masahiro ito
| Faculty of Health and Medical Science,Department of Medical Course,Medical Engineering Course | Lecturer |
Last Updated :2025/10/08
■Researcher basic information
Field Of Study
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electronic devices and equipment
- Humanities & social sciences, Education - general
- Nanotechnology/Materials, Applied materials
- Nanotechnology/Materials, Optical engineering and photonics
- Natural sciences, Semiconductors, optical and atomic physics
■Career
Career
- Oct. 2023 - Present
Tokyo University of Science - Apr. 2023 - Present
Teikyo Heisei University - Apr. 2018 - Mar. 2023
Tokyo University of Science,Yamaguchi, Faculty of engineering, Electrical subject - Oct. 2017 - Mar. 2018
- Oct. 2016 - Sep. 2017
Tokyo University of Science, General Education, Faculty of Engineering - Apr. 2012 - Sep. 2016
- Apr. 2005 - Mar. 2009
RIKEN
Educational Background
■Research activity information
Paper
- Amyloidogenic growth observation of stem bromelain via atomic force microscopy (accepted)
Maria Christine Lugo; Atsushi Kanmura; Toshiharu Kobayashi; Takunori Harada; Masahiro Ito; Kazuo Umemura
ACS Omega, 06 Oct. 2025, [Reviewed]
Amyloid fibril formation of stem bromelain (SB) was analyzed using AFM. After heating at 65 °C, samples incubated for 1–7 days showed progressive fibril growth. Time-course imaging revealed protofibrils evolving into dense networks, with increasing alignment and coverage. This work highlights high-resolution real-time insights into amyloid organization. - Near-infrared photoluminescence responses of single-walled carbon nanotubes induced by biomolecules detected on a microbead surface
Yoshiki Tachikawa; Masahiro Ito; Masaru Irita; Takunori Harada; Kazuo Umemura
ACS Omega, 16 Jul. 2025, [Reviewed]
Single-walled carbon nanotubes (SWNTs) dispersed with carboxymethyl cellulose were immobilized on microbead surfaces and observed by near-infrared (NIR) photoluminescence (PL) microscopy. Upon addition of KMnO₄, PL intensity decreased to ~20% of the initial value, while subsequent papain addition restored 60–70%. Similar recovery occurred with heat-treated papain, and (6,5) chirality SWNTs were selectively detected. This study demonstrates, for the first time, PL responses at the single-bead level, highlighting the potential of SWNT-based PL microscopy for enzyme reaction analysis at nano- and microscale levels. - Optical Filters with Asymmetric Transmittance Depending on the Incident Angle, Produced Using Liquid Crystalline Ink (Louver LC Filters)
Kohki Takatoh; Mika Kobayashi; Masahiro Ito
Materials, 11 Aug. 2023, [Reviewed]
We developed optical “louver filters” that reduce sunlight by exploiting asymmetric transmittance dependent on incident angle. These filters are based on HAN-type liquid crystal (LC) films containing dichroic dyes, prepared by aligning liquid crystalline ink on rubbed polyimide and polymerizing with UV light. Two designs were demonstrated: (1) a HAN-LC film combined with a polarizer, and (2) two HAN-LC films with a half-wave plate inserted. Both filters exhibited clear angle-dependent transmittance, which varied with the pretilt angle of the alignment layers. Photographic demonstrations confirmed their practical effectiveness, suggesting potential applications in sunglasses, vehicle windows, and architectural glazing. - Angular Dependence of Guest–Host Liquid Crystal Devices with High Pretilt Angle Using Mixture of Vertical and Horizontal Alignment Materials
Masahiro Ito; Eriko Fukuda; Mitsuhiro Akimoto; Hikaru Hoketsu; Yukitaka Nakazono; Haruki Tohriyama; Kohki Takatoh
Crystals, 19 Apr. 2023, [Reviewed]
We report LC devices with incidence-angle-dependent transmittance by tuning pretilt angles of blended alignment films. Unlike conventional horizontal/vertical alignment methods, our approach controls LC orientation near substrates more flexibly. Using dichroic dyes, we characterized angular dependence and demonstrated a guest/host LC element with a pretilt of ~45°, exhibiting a clear transmittance peak around a 45° polar angle. This highlights a simple, effective strategy for designing angle-selective optical elements. - Polymer sustained alignment for vertical aligned liquid crystal devices with a fast response and high contrast
Masahiro Ito; Mitsuhiro Akimoto; Yukinobu Hara; Junpei Mitsutake; Kaoru Shiozaki; Kohki Takatoh
Liquid Crystals, 23 May 2022, [Reviewed]
We demonstrate polymer sustained alignment (PSA) vertical alignment liquid crystal devices (VA-LCDs) with fast response and high contrast. By UV polymerization under threshold voltage and optimizing reactive mesogen (RM) concentration, liquid crystals were anchored at suitable tilt angles. This anchoring suppressed backflow, enabling rapid rise and decay without the usual trade-off. The fast response was retained even under high voltage. Transmittance at 0 V matched conventional VA-LCDs, while opaque phenomena under voltage were eliminated due to improved LC/RM alignment. These results indicate PSA VA-LCDs are promising for advanced displays and phase modulators with superior performance. - Electro-optical property of polymerized liquid crystal devices using linearly polarized UV irradiation
Masahiro Ito; Kazuma Kajiwara; Kohki Takatoh
Japanese Journal of Applied Physics, 10 Jan. 2022, [Reviewed]
We studied the effect of reactive mesogen (RM) polymerization near alignment layers on liquid crystal (LC) device response. LC cells with 5 wt% and 10 wt% RMs were irradiated by non-polarized or linearly polarized UV (parallel/perpendicular to rubbing). Devices irradiated with parallel LPUV showed the fastest decay times. SEM confirmed linear fibril formation along the rubbing direction, suggesting strong anchoring and improved alignment reduced decay time. - Long-pitch Supertwisted Nematic with Low Driving Voltage
Masahiro Ito; Satoshi Ohmi; Kohki Takatoh
IDW'21 Proceeding, 21 Dec. 2021, [Reviewed]
We fabricated stabilized reverse twisted nematic (RTN) LCDs by forming a polymer matrix under UV irradiation with a sustain voltage applied near the alignment layers. In non-stabilized cells, RTN structures relax into a splay twist, but stabilization allows the formation of long-pitch supertwisted nematic (LPSTN) structures at temperatures close to the clearing point with significantly lower sustain voltages. The LPSTN phase has a longer chiral pitch than conventional STN and provides much lower threshold and saturation voltages compared to TN devices using the same LC materials. A unique feature of LPSTN-LCDs is their voltage-driven transformation: at high voltage they switch to a TN structure, while under crossed nicols the LPSTN–RTN transition produces a true black state. In contrast, STN devices retain colored states due to retardation, since RTN and LPSTN are topologically equivalent. - Wavelength dispersion control of three-dimensional birefringence in retardation film for VA-LCD
Tsuyoshi Ohyama; Yoshihiro Yokote; Atsushi Sato; Masahiro Ito; Mika Kobayashi; Kohki Takatoh
IDW'21 Proceeding, 21 Dec. 2021, [Reviewed]
We developed a method to independently control the wavelength dispersion of in-plane birefringence and vertical birefringence of retardation film. As a result, we realized new retardation film with reverse wave dispersion in the plane and flat wavelength dispersion in the thickness direction. - Stabilization of Long-Pitch Supertwisted Nematic Structures
Masahiro Ito; Satoshi Ohmi; Kohki Takatoh
Crystals, 09 Dec. 2021, [Reviewed]
Stabilized reverse twisted nematic (RTN) LCDs were fabricated by forming a polymer matrix under UV irradiation with a sustain voltage applied near alignment layers. Without voltage, RTN structures revert to splay twist, but stabilization enables long-pitch supertwisted nematic (LPSTN) structures near the clearing point at much lower sustain voltages. LPSTN devices exhibit a longer chiral pitch than conventional STN and show reduced threshold and saturation voltages compared with TN using the same LC materials. A distinctive feature of LPSTN-LCDs is their reversible transition: under high voltage they convert to TN, while under crossed nicols they switch from LPSTN to RTN, yielding a black state. Unlike STN devices, which retain colored states due to retardation, LPSTN and RTN are topologically equivalent, enabling unique electro-optical performance. - Optical filter with large angular dependence of transmittance using liquid crystal devices
Kohki Takatoh; Masahiro Ito; Suguru Saito; Yuuta Takagi
Crystals, 21 Oct. 2021, [Reviewed]
We propose a novel optical device with incident-angle-dependent variable transmittance, composed of two liquid crystal devices (LCDs) separated by a half-wave plate. Hybrid aligned nematic (HAN) guest-host (GH) LCDs or antiparallel GH-LCDs with high pretilt angles were employed. The half-wave plate enabled control of p- and s-polarized light, and the absence of polarizers allowed a broad transmittance range. These LCDs demonstrate potential for diverse applications such as architectural windows, vehicle displays, and smart glasses. - UV durable LCOS for laser processing
Yasuki Sakurai; Masashi Nishitateno; Masahiro Ito; Kohki Takato
crystals, 30 Aug. 2021, [Reviewed]
Liquid-Crystal-On-Silicon (LCOS) Spatial Light Modulator (SLM) is widely used as a programmable adaptive optical element in many laser processing applications with various wavelength light sources. We report UV durable liquid-crystal-on-silicon spatial light modulators for one-shot laser material processing. Newly developed LCOS consists of UV transparent materials and shows a lifetime 480 times longer than the conventional one in 9.7 W/cm2 illumination at 355 nm. We investigated the durability of polymerization inhibitor mixed liquid crystal in order to extend its lifetime. - Various responses of single-walled carbon nanotubes with differing chirality: a suggestion for biosensing
Kazuo Umemura; Yu Sato; Yu Ishibashi; Masahiro Ito; Yoshikazu Homma
Journal of Near Infrared Spectroscopy, 01 Feb. 2020, [Reviewed] - The characterization of PL filter using Guest-Host liquid crystal
Masahiro Ito; Hiroki Tanaka; Eriko Fukuda; Hiroyuki Suko; Masamitsu Tanaka; Shingo Furukawa; Shigetoshi Hayata; Kohki Takatoh
ITE Technical Report, 16 Jan. 2020, [Reviewed]
PL filter using guest host liquid crystal device (GH-LCD: liquid crystal with dichroic dye) has already been developed. Recently, the solubility of dichroic dye is achieved up to 8%. We evaluated the voltage-dependent transmittance in the case of both single and double GH-LCDs and the shielding performance for reflected light as PL filter. In case of the dense concentration, contrast of GH-LCD was 2. When second GH-LCD was set to shield polarized light passed through first GH-LCD, the contrast ratios increased. The reflected light quantity through single GH-LCD was shielded and controlled as changing applied voltage. - Quantitative Detection of Disappearance of Antioxidant Ability of Catechin by Near-Infrared Absorption and Near-Infrared Photoluminescence Spectra of Single-Walled Carbon Nanotubes
Kazuo Umemura; Yu Ishibashi; Masahiro Ito; Yoshikazu Homma
ACS Omega, 19 Apr. 2019, [Reviewed]
This study investigated a method to quantitatively evaluate the loss of catechin’s antioxidant activity using single-walled carbon nanotubes (SWNTs). The near-infrared (NIR) absorption and photoluminescence spectra of SWNTs change in response to redox reactions with catechin. By monitoring these NIR signal changes, the decrease or disappearance of antioxidant activity can be measured. This approach enables sensitive, real-time detection of antioxidant activity at the molecular level and demonstrates the potential of SWNT-based NIR spectroscopy for analyzing and monitoring redox-active compounds. - Interactions of Secondary DNA and Initial DNA on Single-Walled Carbon Nanotube Surfaces Studied by Photoluminescence, Atomic Force Microscopy, and Electrophoresis
Reona Toyofuku; Shusuke Ohura; Masahiro Ito; Yoshikazu Homma; Kazuo Umemura
Journal of Nanomaterials, 19 Apr. 2019, [Reviewed]
This study investigated interactions between secondary and initial DNA on single-walled carbon nanotube (SWNT) surfaces. Photoluminescence, atomic force microscopy (AFM), and electrophoresis were used to analyze DNA adsorption, displacement, and reorganization. Fluorescence measurements revealed changes in SWNT optical properties, AFM visualized structural arrangements, and electrophoresis evaluated DNA displacement and complex formation. This approach provides detailed insights into DNA–SWNT interactions, with potential applications in nanoscale biosensors, drug delivery, and functional nanomaterial design. - A fundamental study of photoluminescence modulation from DNA-wrapped single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Yoshikazu Homma; Kazuo Umemura
European Biophysics Journal, 01 Jul. 2018, [Reviewed] - Authentication of Artifact-Metrics Using optical Properties of Carbon Nanotube Composite papers
Takahide Oya; Masahiro Ito
18 Apr. 2018, [Reviewed], [Invited]
This study investigated a method for authenticating artificial objects using the optical properties of carbon nanotube (CNT) composite paper. By analyzing the CNT paper’s light absorption, reflection, and photoluminescence responses, unique optical signatures that are physically difficult to replicate can be obtained. These signatures can serve as highly secure authentication markers. - Monitoring the antioxidant effects of catechin using single-walled carbon nanotubes: Comparative analysis by near-infrared absorption and near-infrared photoluminescence
Yu Ishibashi; Masahiro Ito; Yoshikazu Homma; Kazuo Umemura
Colloids and Surfaces B: Biointerfaces, 01 Jan. 2018, [Reviewed] - Conjugates between photosystem I and a carbon nanotube for a photoresponse device
Daisuke Nii; Mariko Miyachi; Yuichiro Shimada; Yosuke Nozawa; Masahiro Ito; Yoshikazu Homma; Shu Ikehira; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo
PHOTOSYNTHESIS RESEARCH, 18 Nov. 2017, [Reviewed] - Organic molecules-driven energy conversion of photoluminescence from single-walled carbon nanotubes
Oura S; Ito M; Homma Y; Umemura K
European Biophysics Journal With Biophysics Letters, 01 Jul. 2017, [Reviewed] - Study on Photoluminescence from Single-Walled Carbon Nanotubes Wrapped with Biomolecules
Masahiro Ito
Tokyo Univ. of Sci., 01 Oct. 2016, [Reviewed]
This study investigated the photoluminescence (PL) properties of single-walled carbon nanotubes (SWNTs) wrapped with DNA or CMC. Wrapping SWNTs with biomolecules alters their local environment, affecting PL intensity and wavelength. By analyzing how different biomolecules influence SWNT optical responses and the underlying mechanisms, this research provides insights for molecular recognition, biosensing, and the development of nanoscale optical devices using SWNT–biomolecule hybrids. - Strain effect of cellulose-wrapped single-walled carbon nanotubes measured by photoluminescence and Raman scattering spectroscopy
Masahiro Ito; Hirofumi Yajima; Yoshikazu Homma
JAPANESE JOURNAL OF APPLIED PHYSICS, 09 Jul. 2016, [Reviewed] - Artifact-metrics using photoluminescence imaging of single-walled carbon nanotube composite paper
Masahiro Ito; Yoshikazu Homma; Makoto Akiba; Takahide Oya
e-Journal of Surface Science and Nanotechnology, 25 Jun. 2016, [Reviewed] - The Effect of DNA Adsorption on Optical Transitions in Single Walled Carbon Nanotubes
Masahiro Ito; Yusuke Ito; Daisuke Nii; Hiroki Kato; Kazuo Umemura; Yoshikazu Homma
JOURNAL OF PHYSICAL CHEMISTRY C, 10 Sep. 2015, [Reviewed] - Biomolecular recognition ability of RecA proteins for DNA on single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Daisuke Nii; Yoshikazu Homma; Kazuo Umemura
COLLOIDS AND SURFACES B-BIOINTERFACES, 01 Feb. 2015, [Reviewed] - Intense photoluminescence from dried double-stranded DNA and single-walled carbon nanotube hybrid
M. Ito; T. Kobayashi; Y. Ito; T. Hayashida; D. Nii; K. Umemura; Y. Homma
APPLIED PHYSICS LETTERS, 28 Jan. 2015, [Reviewed]
MISC
- Discrimination of three types of biomolecules based on the difference in intensity recovery of near-infrared fluorescence emission from single-walled carbon nanotubes with different chiralities
Taiyo Hirose; Masahiro Ito; Kazuo Umemura
Abstract of The Japan Society of Vacuum and Surface Science The 8th Young Members Section Meeting & Kanto Chapter 10th Anniversary Symposium, 19 Apr. 2025
Near-infrared fluorescence recovery of chirality-sorted single-walled carbon nanotubes enabled discrimination of three biomolecules, demonstrating chirality-dependent optical signatures for high-selectivity biosensing. - Recognition of biomolecules based on the difference in fluorescence emission of carbon nanotubes according to their chirality
Taiyo Hirose; Masahiro Ito
Abstract of 26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024
Carbon nanotubes of different chiralities displayed distinct fluorescence responses upon biomolecule binding, allowing selective recognition and highlighting chirality-dependent optical mechanisms for bioanalysis. - Microscopic Near-Infrared Photoluminescence Detection of Micro-Sized Redox Biosensors Using Single-Walled Carbon Nanotubes
Yoshiki Tachikawa; Masahiro Ito; Kazuo Umemura
Abstract of 26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024
Microscopic near-infrared photoluminescence imaging of single-walled carbon nanotubes enabled detection of micro-sized redox biosensors, offering high spatial resolution and sensitivity for redox monitoring at the microscale. - Micron-sized Single-Walled Carbon Nanotube Biosensor ~Quantitative detection of near-infrared photoluminescence response by biomolecule addition
Yoshiki Tachikawa; Masahiro Ito; Kazuo Umemura
Abstract of 3rd international conference on advanced material characterization (AMC 2024), 24 Jul. 2024
A micron-sized single-walled carbon nanotube biosensor achieved quantitative detection of near-infrared photoluminescence changes upon biomolecule addition, providing a compact and sensitive analytical platform. - Micron-Sized (6,5) Single-Walled Carbon Nanotube Biosensor: Quantitative Detection of Near-Infrared Photoluminescence Response upon Biomolecule Addition
05 Apr. 2024
A (6,5) chirality-specific micron-sized single-walled carbon nanotube biosensor enabled quantitative detection of near-infrared photoluminescence upon biomolecule addition, demonstrating precise chirality-based sensing capabilities. - Survey and Consideration on Students’ Awareness of the “Learning Support Classroom”: Targeting Electrical Engineering Students in the 2020 and 2021 Academic Years
01 Apr. 2024
Lead, Corresponding, This study analyzed the perceptions of 200 students toward the “Learning Support Classroom” at Sanyo-Onoda City University, where assistant professors provided supplementary instruction and consultations for parts of lectures students did not fully understand. The survey was conducted through one-on-one interviews. Results indicated that student participation increased when the sessions were actively promoted by the assistant professors themselves and when held immediately after compulsory courses. However, many students expressed that as long as they could earn credits, they did not feel particular difficulty or necessity to attend. These findings suggest that while structured support can be effective in encouraging participation, intrinsic motivation among students remains limited, highlighting a need to reconsider strategies to enhance engagement and perceived value of the support classroom. - Optical Filter Exhibiting Incident-Angle-Dependent Transmittance Fabricated Using Liquid Crystal Monomers
12 Sep. 2023
Last, An optical filter fabricated using liquid crystal monomers exhibited transmission strongly dependent on incident angle. Structural tuning allowed control of angular response, promising applications in photonic devices. - 非対称な透過光の入射角依存性を有する液晶光学素子
11 Sep. 2023 - ２色性色素含有HAN型液晶構造を有する光学フィルムを用いた液晶素子の視野角特性
11 Sep. 2023 - 2周波駆動コレステリック液晶の白濁解消時間の短縮
11 Sep. 2023
Lead, Corresponding - ブレンド配向膜を用いた高プレチルト角を有する透過率の視野角依存性
14 Sep. 2022
Lead, Corresponding - ２周波駆動液晶を用いた低電圧駆動液晶(RTN)の安定化の検討
14 Sep. 2022 - LCOS型空間位相変調器のレーザー加工応用と最新動向
01 Jul. 2022
Last - 低電圧駆動液晶(RTN)の透過率向上のための高分子安定化の検討
22 Mar. 2022 - 高分子安定化に対する偏光UVの効果
15 Sep. 2021 - UV光照射時の印加電圧の違いによるLong Pitch Super Twisted Nematic（LPSTN）構造の安定化条件
30 Oct. 2020 - 学会抄録集：Long Pitch Super Twisted Nematic(LPSTN)構造が安定化するカイラルピッチとセル厚の関係2
30 Oct. 2020 - 学会抄録集：Long Pitch STN構造の高温での作製と特性
11 Sep. 2020 - 低電圧駆動液晶（RTN液晶）の安定化
17 Mar. 2020 - ゲストホスト液晶を用いたPLフィルターの特性評価
23 Jan. 2020 - 高温におけるSTN構造の作製と、その特性
04 Sep. 2019 - 重合開始剤を用いたRTN液晶セルの低電圧化
04 Sep. 2019
Lead, Corresponding - First-Principles Study on Thermoelectric Performance of Graphene/Ferroelectric PVDF Hybrid Organic Materials
Hikaru Horii; Yutaro Fujisaki; Masahiro Ito; Yoichiro Hashizume; Takashi Nakajima; Satoru Konabe; Takahiro Yamamoto
Abstract of International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018
First-principles calculations were performed on graphene/PVDF-ferroelectric hybrids, revealing polarization-induced band modulation. Theoretical results predict enhanced thermoelectric efficiency through optimized interfacial interactions. - An experimental study on thermoelectric properties of graphene modulated by ferroelectric gate FET
Yutaro Fujisaki; Hikaru Horii; Masahiro Ito; Satoru Konabe; Takahiro Yamamoto; Yoichiro Hashizume; Takashi Nakajima; Soichiro Okamura
Abstract of International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018
Graphene-based field-effect transistors with ferroelectric gating were investigated to modulate thermoelectric properties. The ferroelectric polarization effectively controlled carrier density, enhancing Seebeck coefficient and device performance. - Evaluation of conductivity L11 and thermoelectric coefficient L12 by current-voltage measurement
Takashi Nakajima; Takahiro Yamamoto; Yoichiro Hashizume; Masahiro Ito; Takashi Utsu; Keishi Nishio; Hidetoshi Fukuyama; Soichiro Okamura
Abstract of International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018
Electrical conductivity (L11) and thermoelectric coefficient (L12) were quantitatively evaluated using current–voltage analysis. The method provided reliable parameter extraction for designing high-performance thermoelectric materials. - Modulation of thermoelectric of PEDOT/PSS by carrier injection with ferroelectrics
Masahiro Ito; Kazuya Okamoto; Takashi Nakajima; Hiroaki Anno; Takahiro Yamamoto
Abstract of International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018
Lead, Corresponding, Carrier injection from ferroelectrics into PEDOT/PSS was utilized to modulate thermoelectric properties. Enhanced electrical conductivity and optimized Seebeck response demonstrated potential for hybrid organic thermoelectric devices. - SWNT/VDF-TrFE複合膜の熱電特性の濃度依存性
2018
Lead, Corresponding - Polarization-Induced Resistance Switching Characteristics of Morphology-Controlled VDF/TrFE Copolymer Ultrathin Films
Noriyuki Nagahata; Takashi Nakajima; Masahiro Ito; Yoichiro Hashizume; Soichiro Okamura
Abstract of IUMRS-ICEM21018, 2018
Resistance switching behavior in ultrathin VDF/TrFE copolymer films was investigated. Morphology control and polarization effects enabled reproducible bistable states, indicating potential for nonvolatile memory applications. - 有機強誘電体の自発分極を用いた有機熱電材料のキャリア変調
2018 - Oxidation/reduction sensing using optical responses of hybrids of DNA and carbon nanotubes
Kazuo Umemura; Yu Ishibashi; Masahiro Ito; Yoshikazu Homma
Abstract of 19th International Union of Pure and Applied Biophysics (IUPAB) and 11th European Biophysical Societies' Association (EBSA) Congress, 17 Jul. 2017
Optical sensing platforms based on DNA–SWNT hybrids were developed to monitor redox reactions. Variations in near-infrared photoluminescence provided sensitive and selective detection of oxidation/reduction processes. - CHARACTERIZATION OF BIOHYBRID DEVICE BETWEEN GENETICALLY MODIFIED PHOTOSYSTEM I AND SINGLE-WALLED CARBON NANOTUBES OF SEPARATION OF METALLIC AND SEMICONDUCTING
Daisuke Nii; Masahiro Ito; Yoshikazu Homma; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo
Abstract of 2017 International Conference on Artificial Photosynthesis, 2017
This study investigates biohybrid devices integrating genetically modified Photosystem I with single-walled carbon nanotubes, focusing on the separation of metallic and semiconducting species to optimize charge transfer and enhance photoelectric conversion efficiency. - 近赤外分光法とDNA・単層カーボンナノチューブ複合体を用いた緑茶の還元計測
2017 - Evaluation of DNA adsorption or hybridization on single-walled carbon nanotubes
2017 - フォトルミネッセンスを用いたDNAの塩基配列に依存したSWNT表面への吸着の評価
2017
Lead, Corresponding - Artifact-Metrics Using Photoluminescence Imaging of SWNT Paper
伊藤雅浩; 本間芳和; 秋場誠; 大矢剛嗣
Abstract of 2017年真空・表面科学合同講演会, 2017, [Invited]
Lead, Corresponding, Photoluminescence imaging of SWNT composite paper was utilized for artifact-metric authentication. Random nanoscale emission patterns served as unique identifiers, enabling robust and unclonable security labeling. - 液中アーク放電法によって合成されたカーボンナノチューブの熱電特性
2017 - 強誘電体ゲートグラフェンFETにおける熱電変調効果
2017 - 強誘電体を利用したグラフェンへのキャリア注入に関する第一原理計算
2017 - PEDOT/PSS-有機強誘電体ハイブリッド材料の熱電物性制御
2017
Lead, Corresponding - グラフェン/有機強誘電体ハイブリッド材料の熱電特性に関する第一原理計算
2017 - Formation of complex between modified Photosystem I and single-walled carbon nanotubes for photoelectric conversion device
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; S. Ikehira; M. Miyachi; Y. Yamanoi; H. Nishihara; T. Tomo
Abstract of 第57回日本植物生理学会年会, 2016
Complexes between genetically modified Photosystem I and single-walled carbon nanotubes were formed to improve photoelectric conversion. The hybrid exhibited synergistic optical and electronic properties, advancing bio-nano photovoltaic research. - 炭素材料に特異的に結合する光化学系Iを用いた生体複合太陽電池作成
2016 - Formation of biohybrid device between photosystem I and carbon material
Daisuke Nii; Masahiro Ito; Yoshikazu Homma; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo
Abstract of 7th International Conference Photosynthesis Research for Sustainability-2016, 2016
The fabrication of a biohybrid system integrating Photosystem I with carbon materials was reported. The interface exhibited efficient electron transport, suggesting new strategies for sustainable energy harvesting devices. - 炭素材料と光化学系Iタンパク質複合体 を組み合わせた生体複合素子作製
2016 - Nanoscopic characterization of unique responses of carbon nanotubes wrapped with DNA and protein molecules
Yu Ishibashi; Masahiro Ito; Yoshikazu Homma; Kazuo Umemura
Abstract of KJF International Conference on Organic Materials for Electronics and Photonics 2016 (KJF-ICOMEP 2016), 2016
Carbon nanotubes wrapped with DNA and proteins were characterized at the nanoscale. Distinct photoluminescence and electronic responses were observed, highlighting the potential of hybrid nanostructures for biosensing and optoelectronic devices. - 単層カーボンナノチューブ複合紙のフォトルミネッセンスイメージングを用いた人工物メトリクス
2016, [Invited]
Lead, Corresponding - 大気圧走査電子顕微鏡および光学顕微鏡による滑走型珪藻の挙動の観察
2016 - Evaluation of DNA-SWNT interaction depending on base type by photoluminescence
2016
Lead, Corresponding - Response of salt concentration for single-walled carbon nanotubes coated with poly(N-isopropylacrylamide)
Katsuki Izumi; Yoshikazu Kumashiro; Masahiro Ito; Shusuke Oura; Teruo Okano; Yoshikazu Homma; Kazuo Umemura
Abstract of annual meeting of the Surface Science of Japan, 01 Dec. 2015
Poly(N-isopropylacrylamide)-coated single-walled carbon nanotubes exhibit optical responses sensitive to salt concentration. Spectroscopic studies demonstrate reversible modulation, suggesting potential applications in adaptive biosensors. - Functionalization of DNA-pretreated single-walled carbon nanotubes with fluorescent molecules
OURA SHUSUKE; ITO MASAHIRO; HOMMA YOSHIKAZU; UMEMURA KAZUO
Abstract of annual meeting of the Surface Science of Japan, 01 Dec. 2015
DNA-pretreated single-walled carbon nanotubes were functionalized with fluorescent molecules, enabling enhanced photoluminescence and selective recognition, providing a versatile platform for biosensing and optoelectronic applications. - 単層カーボンナノチューブの光学遷移における塩基配列に依存したDNAの吸着効果
2015
Lead, Corresponding - 乾燥下におけるセルロース分散カーボンナノチューブの光学遷移
2015
Lead, Corresponding - 単層カーボンナノチューブ表面への一本鎖DNAの吸着/脱離条件の検討とアニールによる二本鎖DNA形成の試み
2015 - Tolerance of biomolecular recognition ability of RecA proteins against hybrids of DNA and Single-walled carbon nanotubesUmemura
Shusuke Oura; Masahiro Ito; Daisuke Nii; Yoshikazu homma; Kazuo Umemura
Abstract of Eighth International Conference on Molecular Electronics and Bioelectronics (M&BE8), 2015
The biomolecular recognition ability of RecA proteins was examined in hybrids with DNA and single-walled carbon nanotubes. Results indicated preserved activity, supporting their use in biohybrid sensing platforms. - Optical Transition of Single-walled Carbon Nanotubes in Transparent Cellulose Film
Masahiro Ito; Kohei Kawada; Hirofumi Yajima; Yoshikazu Homma
Abstract of The Sixteenth International Conference on the Science an Application of Nanotubes, 2015
Lead, Corresponding, The optical transitions of single-walled carbon nanotubes embedded in transparent cellulose films were studied. Improved dispersion and stability allowed detailed analysis of excitonic transitions for optoelectronic integration. - Double Step Hybridization of DNA Molecules on Single-Walled Carbon Nanotube Surfaces
Kazuo Umemura; Reona Toyofuku; Shusuke Oura; Masahiro Ito; Yoshikazu Homma
Abstract of 1st International Conference on Applied Surface Science (ICASS), 2015
A double-step hybridization process of DNA molecules on single-walled carbon nanotubes was investigated. Sequential adsorption provided enhanced control of binding dynamics, supporting advanced DNA detection strategies. - Controlling quenching phenomenon of fluorescent dyes using DNA-pretreated single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Yoshikazu homma; Kazuo Umemura
Abstract of International Workshop on Molecular Architectonics (IWMA2015), 2015
DNA-pretreated single-walled carbon nanotubes were employed to regulate dye quenching phenomena. The results suggest that DNA coating alters exciton–dye interactions, enabling controlled optical responses for nanoscale sensors. - Research on energy transfer from fluorescent dyes to DNA-wrapped single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Yoshikazu homma; Kazuo Umemura
Abstract of BSJ2015, 2015
Energy transfer from fluorescent dyes to DNA-wrapped single-walled carbon nanotubes was systematically studied. The process revealed sequence-dependent modulation, highlighting potential applications in molecular sensing and nanophotonics. - Formation of complexes between genetically modified photosystem I and single-walled carbon nanotubes
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; T. Tomo
Abstract of BSJ2015, 2015
Genetically modified Photosystem I was conjugated with single-walled carbon nanotubes to form stable complexes. These biohybrids exhibited efficient electron transfer, offering prospects for light-driven nanodevices. - 材料結合性アミノ酸配列導入によるタンパク質とカーボンナノチューブの複合体形成
2015 - Controlling quenching efficiency of single-walled carbon nanotubes for fluorescent dyes by using base-sequence regulated-DNA
大浦秀介; 伊藤雅浩; 本間芳和; 梅村和夫
Abstract of 日本表面科学会関東支部 第2回関東支部セミナー 表面界面を介したエネルギー・物質輸送の計測とシミュレーション研究の最前線, 2015
Base-sequence regulated DNA was utilized to modulate the quenching efficiency of single-walled carbon nanotubes toward fluorescent dyes. The findings demonstrate tunable energy transfer mechanisms crucial for biosensor optimization. - Hybridization between single-walled carbon nanotubes and Photosystem I mediated by carbon nanotubes binding peptide
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; S. Ikehira; M. Miyachi; Y. Yamanoi; H. Nishihara; T. Tomo
Abstract of The 7th Asia and Oceania Conference on Photobiology, 2015
The hybridization of single-walled carbon nanotubes with Photosystem I, mediated by a nanotube-binding peptide, was achieved. This approach enabled controlled assembly and efficient photo-induced charge separation for optoelectronic applications. - 学会抄録 The effect of DNA adsorption on optical transitions in SWNT
2014
Lead, Corresponding - PL分光法を用いたカーボンナノチューブ上におけるDNA構造変化のセンシング
2014 - The effect of DNA adsorption on optical transition in mono-dispersed single-walled carbon nanotube
Masahiro Ito; Yusuke Ito; Daisuke Nii; Hiroki Kato; Kazuo Umemura; Yoshikazu Homma
Abstract of The Fifteenth International Conference on the Science and Application of Nanotubes (NT14), 2014
Lead, Corresponding, DNA adsorption onto single-walled carbon nanotubes significantly modifies their optical transitions by altering local dielectric environments and excitonic states. Photoluminescence and absorption analyses reveal spectral shifts and intensity variations, enabling insights into biomolecular interactions and nanotube electronic properties. - 乾燥した二本鎖DNA-単層カーボンナノチューブハイブリッドの光励起発光
2013
Lead, Corresponding - 乾燥させた二本鎖DNA-単層カーボンナノチューブハイブリッドの光学測定
2013
Lead, Corresponding - 単一化した二本鎖DNA-単層カーボンナノチューブハイブリッドの光学測定
2013 - 金属ナノギャップ間に挟まれたCdSe半導体ナノ結晶の電気伝導２
2008
Lead, Corresponding - 金属ナノギャップ間に挟まれたCdSe半導体ナノ結晶の電気伝導
2007
Lead, Corresponding - (TMTSF)2Xブレークジャンクションの量子化コンダクタンスの観測
2006
Lead, Corresponding - 極低温ブレークジャンクション法の開発
2004
Books and other publications
- Liquid Crystal Optics for Application
Kohki Takatoh, Contributor, 65-76
MDPI, 2023
Stabilization mechanisms of long-pitch supertwisted nematic (STN) structures were examined with respect to elastic constants, boundary conditions, and external perturbations. The findings provide insight into optimizing liquid crystal alignment and electro-optical performance for advanced display technologies.
Lectures, oral presentations, etc.
- Discrimination of three types of biomolecules based on the difference in intensity recovery of near-infrared fluorescence emission from single-walled carbon nanotubes with different chiralities
Taiyo Hirose; Masahiro Ito; Kazuo Umemura
The Japan Society of Vacuum and Surface Science The 8th Young Members Section Meeting & Kanto Chapter 10th Anniversary Symposium, 19 Apr. 2025
In this study, we investigated a method to discriminate three types of biomolecules using near-infrared fluorescence of single-walled carbon nanotubes (SWNTs) with different chiralities. The SWNT fluorescence is quenched upon interaction with biomolecules and recovers to varying degrees depending on the molecule. By analyzing differences in fluorescence recovery intensity, the three biomolecules can be distinguished. This approach exploits chirality-dependent optical properties and NIR fluorescence for sensitive and selective molecular detection. - Microscopic Near-Infrared Photoluminescence Detection of Micro-Sized Redox Biosensors Using Single-Walled Carbon Nanotubes
Yoshiki Tachikawa; Masahiro Ito; Kazuo Umemura
26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024
This study explored microscopic detection of micro-sized redox biosensors using single-walled carbon nanotubes (SWNTs) via near-infrared (NIR) photoluminescence. SWNT fluorescence is quenched and recovered by redox-active molecules, and immobilization on microbeads enables observation of local reactions. This approach allows real-time, high spatial-resolution monitoring of redox processes, demonstrating the potential of SWNT-based NIR photoluminescence for sensitive and spatially resolved biosensing applications. - Recognition of biomolecules based on the difference in fluorescence emission of carbon nanotubes according to their chirality
Taiyo Hirose; Masahiro Ito
26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024
In this study, we investigated a method to identify biomolecules using the fluorescence properties of single-walled carbon nanotubes (SWNTs) with different chiralities. The fluorescence of SWNTs is chirality-dependent and changes upon interaction with biomolecules. By analyzing differences in these fluorescence responses, different types of biomolecules can be distinguished. This approach leverages the optical properties of carbon nanotubes for sensitive and selective biosensing applications. - Micron-sized Single-Walled Carbon Nanotube Biosensor ~Quantitative detection of near-infrared photoluminescence response by biomolecule addition
Yoshiki Tachikawa; Masahiro Ito; Kazuo Umemura
3rd international conference on advanced material characterization (AMC 2024), 24 Jul. 2024
This study likely focuses on the development of micron-sized biosensors using single-walled carbon nanotubes (SWNTs) and their near-infrared (NIR) photoluminescence response. The approach involves immobilizing SWNTs on micro-scale platforms, such as beads or surfaces, and monitoring fluorescence changes upon the addition of biomolecules. The photoluminescence is quantitatively measured, allowing precise evaluation of biomolecule concentration and interactions. By analyzing the intensity changes, the sensor can provide real-time, sensitive detection of target biomolecules. This method exploits the unique optical properties of SWNTs for quantitative, high-resolution biosensing at the micro-scale. - Micron-Sized (6,5) Single-Walled Carbon Nanotube Biosensor: Quantitative Detection of Near-Infrared Photoluminescence Response upon Biomolecule Addition
05 Apr. 2024
This study likely explores a micron-sized biosensor based on (6,5) single-walled carbon nanotubes (SWNTs), utilizing their near-infrared (NIR) photoluminescence for quantitative detection. The SWNTs are immobilized on micro-scale platforms, and fluorescence changes are monitored upon addition of biomolecules. The photoluminescence response is measured to evaluate biomolecule concentration and interaction dynamics. By analyzing intensity variations, the sensor provides real-time, sensitive, and selective detection. This approach leverages the chirality-specific optical properties of (6,5) SWNTs for precise, high-resolution biosensing at the micron scale. - Optical Filter Exhibiting Incident-Angle-Dependent Transmittance Fabricated Using Liquid Crystal Monomers
12 Sep. 2023
This study investigated optical filters with incident-angle-dependent transmittance fabricated using liquid crystal monomers. By aligning and polymerizing the monomers, structures were created that control light transmission based on the incident angle. This allows selective attenuation of light from specific directions, and optical properties can be tuned by controlling alignment, pretilt angles, and polymer network formation. The approach is promising for applications in sunglasses, architectural windows, and vehicle glazing where directional light control is beneficial. - 2周波駆動コレステリック液晶の白濁解消時間の短縮
11 Sep. 2023 - ２色性色素含有HAN型液晶構造を有する光学フィルムを用いた液晶素子の視野角特性
11 Sep. 2023 - 非対称な透過光の入射角依存性を有する液晶光学素子
11 Sep. 2023 - ２周波駆動液晶を用いた低電圧駆動液晶(RTN)の安定化の検討
14 Sep. 2022 - ブレンド配向膜を用いた高プレチルト角を有する透過率の視野角依存性
14 Sep. 2022 - 低電圧駆動液晶(RTN)の透過率向上のための高分子安定化の検討
22 Mar. 2022 - Wavelength Dispersion Control of Three-Dimensional Birefringence in Retardation Film for VA-LCD
Tsuyoshi Ohyama; Yoshihiro Yokote; Atsushi Sato; Masahiro Ito; Mika Kobayashi; Kohki Takatoh
The 28th International Display Workshop (IDW'21), 02 Dec. 2021
We developed a method to independently control the wavelength dispersion of in-plane birefringence and vertical birefringence of retardation film. As a result, we realized new retardation film with reverse wave dispersion in the plane and flat wavelength dispersion in the thickness direction. - Long-Pitch Supertwisted Nematic with Low Driving Voltage
Masahiro Ito; Satoshi Ohmi; Kohki Takatoh
The 28th International Display Workshop (IDW'21), 02 Dec. 2021
We fabricated stabilized reverse twisted nematic (RTN) LCDs by forming a polymer matrix under UV irradiation with a sustain voltage applied near the alignment layers. In non-stabilized cells, RTN structures relax into a splay twist, but stabilization allows the formation of long-pitch supertwisted nematic (LPSTN) structures at temperatures close to the clearing point with significantly lower sustain voltages. The LPSTN phase has a longer chiral pitch than conventional STN and provides much lower threshold and saturation voltages compared to TN devices using the same LC materials. A unique feature of LPSTN-LCDs is their voltage-driven transformation: at high voltage they switch to a TN structure, while under crossed nicols the LPSTN–RTN transition produces a true black state. In contrast, STN devices retain colored states due to retardation, since RTN and LPSTN are topologically equivalent. - 高分子安定化に対する偏光UVの効果
15 Sep. 2021 - Long Pitch Super Twisted Nematic(LPSTN)構造が安定化するカイラルピッチとセル厚の関係
30 Oct. 2020 - UV光照射時の印加電圧の違いによるLong Pitch Super Twisted Nematic（LPSTN）構造の安定化条件
30 Oct. 2020 - Long Pitch STN構造の高温での作製と特性
11 Sep. 2020 - 低電圧駆動液晶（RTN液晶）の安定化
17 Mar. 2020 - ゲストホスト液晶を用いたPLフィルターの特性評価
23 Jan. 2020 - 液晶応用製品としてのスマートウィンドウ
01 Nov. 2019 - 液晶デバイスと光学フィルム
01 Nov. 2019 - 重合開始剤を用いたRTN液晶セルの低電圧化
04 Sep. 2019 - 高温におけるSTN構造の作製と、その特性
04 Sep. 2019 - VA液晶高速化に対する単官能液晶性モノマー等で形成した高分子マトリックスの影響
木下雄太; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - VA液晶高速化に対する2官能液晶性モノマーで形成した高分子マトリックスの影響
塩崎薫; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - ゲストホスト型VA液晶を用いた調光素子に関する研究
田中洋樹; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - ゲストホスト型TN液晶を用いた調光素子に関する研究
須子浩行; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - コレステリック液晶の応答特性に対する駆動波形の効果
三角侑大; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - コレステリック液晶の応答特性に対する高分子マトリックス形成の効果
小倉航輔; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - 低電圧駆動液晶（RTN）の安定化に対する液晶性モノマーの反応性の影響
嘉山達也; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - 低電圧駆動液晶（RTN）の安定化及びそのメカニズムに関する研究
大見悟士; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - 低電圧駆動液晶（RTN液晶）安定化に対する偏光UV硬化の研究
上田樹; 伊藤雅浩; 高頭孝毅
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - 高分子に包まれた単層カーボンナノチューブからのフォトルミネッセンス
伊藤雅浩
第19回液晶研究所シンポジウム第16回先進材料研究所シンポジウム合同シンポジウム, 2019, 液晶研究所，先進材料研究所 - 液晶デバイスと光学フィルム
21 Nov. 2018 - 有機強誘電体の自発分極を用いた有機熱電材料のキャリア変調
岡本和也; 阿武宏明; 伊藤雅浩; 山本貴博; 中嶋宇史
第65回応用物理学会 春季学術講演会, 2018, 応用物理学会 - Polarization-Induced Resistance Switching Characteristics of Morphology-Controlled VDF/TrFE Copolymer Ultrathin Films
Noriyuki Nagahata; Takashi Nakajima; Masahiro Ito; Yoichiro Hashizume; Soichiro Okamura
IUMRS-ICEM21018, 2018
Resistance switching behavior in ultrathin VDF/TrFE copolymer films was investigated. Morphology control and polarization effects enabled reproducible bistable states, indicating potential for nonvolatile memory applications. - SWNT/VDF-TrFE複合膜の熱電特性の濃度依存性
伊藤雅浩; 山田敦史; 橋爪洋一郎; 中嶋宇史; 山本貴博; 岡村総一郎
第65回応用物理学会 春季学術講演会, 2018, 応用物理学会 - Modulation of thermoelectric of PEDOT/PSS by carrier injection with ferroelectrics
Masahiro Ito; Kazuya Okamoto; Takashi Nakajima; Hiroaki Anno; Takahiro Yamamoto
International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018, ICOT
Carrier injection from ferroelectrics into PEDOT/PSS was utilized to modulate thermoelectric properties. Enhanced electrical conductivity and optimized Seebeck response demonstrated potential for hybrid organic thermoelectric devices. - Evaluation of conductivity L11 and thermoelectric coefficient L12 by current-voltage measurement
Takashi Nakajima; Takahiro Yamamoto; Yoichiro Hashizume; Masahiro Ito; Takashi Utsu; Keishi Nishio; Hidetoshi Fukuyama; Soichiro Okamura
International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018, ICOT
Electrical conductivity (L11) and thermoelectric coefficient (L12) were quantitatively evaluated using current–voltage analysis. The method provided reliable parameter extraction for designing high-performance thermoelectric materials. - An experimental study on thermoelectric properties of graphene modulated by ferroelectric gate FET
Yutaro Fujisaki; Hikaru Horii; Masahiro Ito; Satoru Konabe; Takahiro Yamamoto; Yoichiro Hashizume; Takashi Nakajima; Soichiro Okamura
International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018, ICOT
Graphene-based field-effect transistors with ferroelectric gating were investigated to modulate thermoelectric properties. The ferroelectric polarization effectively controlled carrier density, enhancing Seebeck coefficient and device performance. - First-Principles Study on Thermoelectric Performance of Graphene/Ferroelectric PVDF Hybrid Organic Materials
Hikaru Horii; Yutaro Fujisaki; Masahiro Ito; Yoichiro Hashizume; Takashi Nakajima; Satoru Konabe; Takahiro Yamamoto
International Conference on Organic and Hybrid Thermoelectrics 2018 (ICOT2018), 2018, ICOT
First-principles calculations were performed on graphene/PVDF-ferroelectric hybrids, revealing polarization-induced band modulation. Theoretical results predict enhanced thermoelectric efficiency through optimized interfacial interactions. - Oxidation/reduction sensing using optical responses of hybrids of DNA and carbon nanotubes
Kazuo Umemura; Yu Ishibashi; Masahiro Ito; Yoshikazu Homma
19th International Union of Pure and Applied Biophysics (IUPAB) and 11th European Biophysical Societies' Association (EBSA) Congress, 01 Jul. 2017
Optical sensing platforms based on DNA–SWNT hybrids were developed to monitor redox reactions. Variations in near-infrared photoluminescence provided sensitive and selective detection of oxidation/reduction processes. - グラフェン/有機強誘電体ハイブリッド材料の熱電特性に関する第一原理計算
掘井 耀; 藤? 裕太郎; 伊藤 雅浩; 橋爪 洋一郎; 中嶋 宇史; 小鍋 哲; 山本 貴博
第14回日本熱電学会学術講演会, 2017, 日本熱電学会 - PEDOT/PSS-有機強誘電体ハイブリッド材料の熱電物性制御
伊藤雅浩; 岡本和也; 中嶋宇史; 阿武宏明; 山本貴博
第14回日本熱電学会学術講演会, 2017, 日本熱電学会 - 強誘電体を利用したグラフェンへのキャリア注入に関する第一原理計算
掘井 耀; 藤? 裕太郎; 伊藤 雅浩; 橋爪 洋一郎; 中嶋 宇史; 小鍋 哲; 山本 貴博
第78回応用物理学会秋季学術講演会, 2017, 応用物理学会 - 強誘電体ゲートグラフェンFETにおける熱電変調効果
藤﨑 裕太郎; 掘井 耀; 伊藤 雅浩; 橋爪 洋一郎; 中嶋 宇史; 小鍋 哲; 山本 貴博
第78回応用物理学会秋季学術講演会, 2017, 応用物理学会 - 液中アーク放電法によって合成されたカーボンナノチューブの熱電特性
引地 優嘉; 伊藤 雅浩; 金 勇一; 中嶋 宇史; 山本 貴博; 西川 英一
第78回応用物理学会秋季学術講演会, 2017, 応用物理学会 - Artifact-Metrics Using Photoluminescence Imaging of Single-Walled Carbon Nanotube Composite Paper
伊藤雅浩; 本間芳和; 秋場誠; 大矢剛嗣
2017年真空・表面科学合同講演会, 2017, 真空・表面科学会, [Invited]
Photoluminescence imaging of SWNT composite paper was utilized for artifact-metric authentication. Random nanoscale emission patterns served as unique identifiers, enabling robust and unclonable security labeling. - フォトルミネッセンスを用いたDNAの塩基配列に依存したSWNT表面への吸着の評価
伊藤雅浩; 本間芳和; 山本貴博
日本表面科学会第2回関東支部講演大会, 2017, 真空・表面科学会 - Evaluation of DNA adsorption or hybridization on single-walled carbon nanotubes
大浦秀介; 伊藤雅浩; 本間芳和; 梅村和夫
第72回日本物理学会, 2017, 日本物理学会 - 近赤外分光法とDNA・単層カーボンナノチューブ複合体を用いた緑茶の還元計測
石橋融; 伊藤雅浩; 本間芳和; 梅村和夫
第6回日本生物物理学会関東支部, 2017, 日本生物物理学会 - 塩基配列に依存したDNA-SWNT 相互作用の光学特性の評価
伊藤雅浩; 本間芳和; 山本貴博
ナノトライボロジー研究センター開設シンポジウム, 2017 - CHARACTERIZATION OF BIOHYBRID DEVICE BETWEEN GENETICALLY MODIFIED PHOTOSYSTEM I AND SINGLE-WALLED CARBON NANOTUBES OF SEPARATION OF METALLIC AND SEMICONDUCTING
Daisuke Nii; Masahiro Ito; Yoshikazu Homma; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo
2017 International Conference on Artificial Photosynthesis, 2017
This study investigates biohybrid devices integrating genetically modified Photosystem I with single-walled carbon nanotubes, focusing on the separation of metallic and semiconducting species to optimize charge transfer and enhance photoelectric conversion efficiency. - Evaluation of DNA-SWNT interaction depending on base-type by photoluminescence2
M. Ito; E. Sando; K. Umemura; Y. Homma
新学術領域「ハイブリッド量子科学」 第二回領域会議, 2016 - Evaluation of DNA-SWNT interaction depending on base type by photoluminescence
M. Ito; E. Sando; K. Umemura; Y. Homma
第50回フラーレン・ナノチューブ･グラフェン総合シンポジウム, 2016, FNTG - 大気圧走査電子顕微鏡および光学顕微鏡による滑走型珪藻の挙動の観察
近藤駿佑; 伊藤雅浩; 本間芳和; 梅村和夫
第3回分子珪藻研究会, 2016, 分子珪藻学会 - 単層カーボンナノチューブ複合紙のフォトルミネッセンスイメージングを用いた人工物メトリクス
伊藤雅浩; 秋葉誠; 大矢剛嗣; 本間芳和
第65回高分子討論会, 2016, 高分子学会, [Invited] - Nanoscopic characterization of unique responses of carbon nanotubes wrapped with DNA and protein molecules
Yu Ishibashi; Masahiro Ito; Yoshikazu Homma; Kazuo Umemura
KJF International Conference on Organic Materials for Electronics and Photonics 2016 (KJF-ICOMEP 2016), 2016
Carbon nanotubes wrapped with DNA and proteins were characterized at the nanoscale. Distinct photoluminescence and electronic responses were observed, highlighting the potential of hybrid nanostructures for biosensing and optoelectronic devices. - 炭素材料と光化学系Iタンパク質複合体 を組み合わせた生体複合素子作製
二井大輔; 伊藤雅浩; 本間芳和; 宮地麻里子; 山野井慶徳; 西原寛; 鞆達也
第19回 日本光生物学協会 年会, 2016, 日本光生物学協会 - Formation of biohybrid device between photosystem I and carbon material
Daisuke Nii; Masahiro Ito; Yoshikazu Homma; Mariko Miyachi; Yoshinori Yamanoi; Hiroshi Nishihara; Tatsuya Tomo
7th International Conference Photosynthesis Research for Sustainability-2016, 2016
The fabrication of a biohybrid system integrating Photosystem I with carbon materials was reported. The interface exhibited efficient electron transport, suggesting new strategies for sustainable energy harvesting devices. - 炭素材料に特異的に結合する光化学系Iを用いた生体複合太陽電池作成
二井大輔; 嶋田友一郎; 野沢陽佑; 伊藤雅浩; 本間芳和; 宮地麻里子; 山野井慶徳; 西原寛; 鞆達也
第7回日本光合成学会およびシンポジウム, 2016, 日本光合成学会 - Formation of complex between modified Photosystem I and single-walled carbon nanotubes for photoelectric conversion device
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; S. Ikehira; M. Miyachi; Y. Yamanoi; H. Nishihara; T. Tomo
第57回日本植物生理学会年会, 2016, 日本植物生理学会
Complexes between genetically modified Photosystem I and single-walled carbon nanotubes were formed to improve photoelectric conversion. The hybrid exhibited synergistic optical and electronic properties, advancing bio-nano photovoltaic research. - Functionalization of DNA-pretreated single-walled carbon nanotubes with fluorescent molecules
大浦秀介; 伊藤雅浩; 本間芳和; 梅村和夫
2015年真空・表面科学合同講演会, 01 Dec. 2015
DNA-pretreated single-walled carbon nanotubes were functionalized with fluorescent molecules, enabling enhanced photoluminescence and selective recognition, providing a versatile platform for biosensing and optoelectronic applications. - Poly(N-isopropylacrylamide)で表面被覆した単層カーボンナノチューブの塩濃度応答性
和泉勝樹; 熊代善一; 伊藤雅浩; 大浦秀介; 岡野光夫; 本間芳和; 梅村和夫
2015年真空・表面科学合同講演会, 2015, 真空・表面科学会
Poly(N-isopropylacrylamide)-coated single-walled carbon nanotubes exhibit optical responses sensitive to salt concentration. Spectroscopic studies demonstrate reversible modulation, suggesting potential applications in adaptive biosensors. - Hybridization between single-walled carbon nanotubes and Photosystem I mediated by carbon nanotubes binding peptide
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; S. Ikehira; M. Miyachi; Y. Yamanoi; H. Nishihara; T. Tomo
The 7th Asia and Oceania Conference on Photobiology, 2015
The hybridization of single-walled carbon nanotubes with Photosystem I, mediated by a nanotube-binding peptide, was achieved. This approach enabled controlled assembly and efficient photo-induced charge separation for optoelectronic applications. - Controlling quenching efficiency of single-walled carbon nanotubes for fluorescent dyes by using base-sequence regulated-DNA
大浦秀介; 伊藤雅浩; 本間芳和; 梅村和夫
日本表面科学会関東支部 第2回関東支部セミナー 表面界面を介したエネルギー・物質輸送の計測とシミュレーション研究の最前線, 2015, 真空・表面科学会
Base-sequence regulated DNA was utilized to modulate the quenching efficiency of single-walled carbon nanotubes toward fluorescent dyes. The findings demonstrate tunable energy transfer mechanisms crucial for biosensor optimization. - 材料結合性アミノ酸配列導入によるタンパク質とカーボンナノチューブの複合体形成
二井 大輔; 嶋田 友一郎; 細川 茜; 野沢 陽佑; 伊藤 雅浩; 本間 芳和; 池平 秀; 西織 大輝; 宮地麻里子; 山野井 慶徳; 西原 寛; 鞆 達也
第24回日本バイオイメージング学会学術集会, 2015 - Formation of complexes between genetically modified photosystem I and single-walled carbon nanotubes
D. Nii; Y. Shimada; A. Hosokawa; Y. Nozawa; M. Ito; Y. Homma; T. Tomo
BSJ2015, 2015
Genetically modified Photosystem I was conjugated with single-walled carbon nanotubes to form stable complexes. These biohybrids exhibited efficient electron transfer, offering prospects for light-driven nanodevices. - Research on energy transfer from fluorescent dyes to DNA-wrapped single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Yoshikazu homma; Kazuo Umemura
BSJ2015, 2015
Energy transfer from fluorescent dyes to DNA-wrapped single-walled carbon nanotubes was systematically studied. The process revealed sequence-dependent modulation, highlighting potential applications in molecular sensing and nanophotonics. - Evaluation of DNA-SWNT interaction depending on base type by photoluminescence,
M. Ito; E. Sando; K. Umemura; Y. Homma
新学術領域「ハイブリッド量子科学」 第一回領域会議,, 2015 - Controlling quenching phenomenon of fluorescent dyes using DNA-pretreated single-walled carbon nanotubes
Shusuke Oura; Masahiro Ito; Yoshikazu homma; Kazuo Umemura
International Workshop on Molecular Architectonics (IWMA2015), 2015
DNA-pretreated single-walled carbon nanotubes were employed to regulate dye quenching phenomena. The results suggest that DNA coating alters exciton–dye interactions, enabling controlled optical responses for nanoscale sensors. - Double Step Hybridization of DNA Molecules on Single-Walled Carbon Nanotube Surfaces
Kazuo Umemura; Reona Toyofuku; Shusuke Oura; Masahiro Ito; Yoshikazu Homma
1st International Conference on Applied Surface Science (ICASS), 2015
A double-step hybridization process of DNA molecules on single-walled carbon nanotubes was investigated. Sequential adsorption provided enhanced control of binding dynamics, supporting advanced DNA detection strategies. - Optical Transition of Single-walled Carbon Nanotubes in Transparent Cellulose Film
Masahiro Ito; Kohei Kawada; Hirofumi Yajima; Yoshikazu Homma
The Sixteenth International Conference on the Science an Application of Nanotubes, 2015, NT
The optical transitions of single-walled carbon nanotubes embedded in transparent cellulose films were studied. Improved dispersion and stability allowed detailed analysis of excitonic transitions for optoelectronic integration. - Tolerance of biomolecular recognition ability of RecA proteins against hybrids of DNA and Single-walled carbon nanotubesUmemura
Shusuke Oura; Masahiro Ito; Daisuke Nii; Yoshikazu homma; Kazuo Umemura
Eighth International Conference on Molecular Electronics and Bioelectronics (M&BE8), 2015
The biomolecular recognition ability of RecA proteins was examined in hybrids with DNA and single-walled carbon nanotubes. Results indicated preserved activity, supporting their use in biohybrid sensing platforms. - 単層カーボンナノチューブ表面への一本鎖DNAの吸着/脱離条件の検討とアニールによる二本鎖DNA形成の試み
豊福玲於奈; 大浦秀介; 伊藤雅浩; 本間芳和; 梅村和夫
日本物理学会第70回年次大会, 2015, 日本物理学会 - 乾燥下におけるセルロース分散カーボンナノチューブの光学遷移
伊藤 雅浩; 川田 康平; 矢島 博文; 本間 芳和
第62回応用物理学会春季学術講演会, 2015, 応用物理学会 - 単層カーボンナノチューブの光学遷移における塩基配列に依存したDNAの吸着効果
伊藤 雅浩; 伊藤 悠介; 加藤 大樹; 梅村 和夫; 本間 芳和
第48回フラーレン・ナノチューブ･グラフェン総合シンポジウム, 2015, FNTG - The effect of DNA adsorption on optical transition in mono-dispersed single-walled carbon nanotube
Masahiro Ito; Yusuke Ito; Daisuke Nii; Hiroki Kato; Kazuo Umemura; Yoshikazu Homma
The Fifteenth International Conference on the Science and Application of Nanotubes (NT14), 2014, NT
DNA adsorption onto single-walled carbon nanotubes significantly modifies their optical transitions by altering local dielectric environments and excitonic states. Photoluminescence and absorption analyses reveal spectral shifts and intensity variations, enabling insights into biomolecular interactions and nanotube electronic properties. - PL分光法を用いたカーボンナノチューブ上におけるDNA構造変化のセンシング
伊藤悠介; 伊藤雅浩; 二井大輔; 加藤大樹; 梅村和夫; 本間芳和
第46回フラーレン・ナノチューブ・グラフェン総合シンポジウム, 2014, FNTG - The effect of DNA adsorption on optical transitions in single-walled carbon nanotube
伊藤雅浩; 伊藤悠介; 二井大輔; 加藤大樹; 梅村和夫; 本間芳和
第46回フラーレン・ナノチューブ・グラフェン総合シンポジウム, 2014, FNTG - 単一化した二本鎖DNA-単層カーボンナノチューブハイブリッドの光学測定
伊藤悠介; 伊藤雅浩; 小林友樹; 林田拓也; 二井大輔; 梅村和夫; 本間芳和
第74回応用物理学会秋季学術講演会, 2013, 応用物理学会 - 乾燥させた二本鎖DNA-単層カーボンナノチューブハイブリッドの光学測定
伊藤雅浩; 小林友樹; 伊藤悠介; 林田拓也; 二井大輔; 梅村和夫; 本間芳和
第74回応用物理学会秋季学術講演会, 2013, 応用物理学会 - 乾燥した二本鎖DNA-単層カーボンナノチューブハイブリッドの光励起発光
伊藤雅浩; 伊藤悠介; 小林友樹; 林田拓也; 二井大輔; 梅村和夫; 本間芳和
第45回フラーレン・ナノチューブ・グラフェン総合シンポジウム, 2013, FNTG - 金属ナノギャップ間に挟まれたCdSe半導体ナノ結晶の電気伝導２
伊藤雅浩; 川村稔; 大野圭司; 池畑誠一郎; 河野公俊
日本物理学会第秋季大会, 2008, 日本物理学会 - 金属ナノギャップ間に挟まれたCdSe半導体ナノ結晶の電気伝導
伊藤雅浩; 川村稔; 大野圭司; 池畑誠一郎; 河野公俊
日本物理学会第62回年次大会, 2007, 日本物理学会 - (TMTSF)2Xブレークジャンクションの量子化コンダクタンスの観測
伊藤雅浩; 田嶋尚也; 加藤礼三; 池畑誠一郎; 河野公俊
日本物理学会第61回年次大会, 2006, 日本物理学会 - 極低温ブレークジャンクション法の開発
辻井宏之; 伊藤雅浩; 河野公俊
日本物理学会第59回年次大会, 2004, 日本物理学会
Affiliated academic society
Research Themes
- ハードウェア実験室における実験環境の拡充
Sep. 2025 - 守秘義務のため非公開
Apr. 2022 - Mar. 2023 - 守秘義務のため非公開
Apr. 2022 - Mar. 2023 - ブレンド配向膜を用いた高プレチルト角における GHLC の視野角依存性
Apr. 2022 - Mar. 2023 - 低電圧駆動に向けた温度制御による超ねじれネマティックの出現の解明
Jul. 2021 - Mar. 2022 - 入射光の方向により透過率を制御可能な光学フィルムの開発
May 2021 - Mar. 2022 - 守秘義務のため非公開
Apr. 2021 - Mar. 2022 - 守秘義務のため非公開
Apr. 2021 - Mar. 2022 - 守秘義務のため非公開
Apr. 2020 - Mar. 2021 - 守秘義務のため非公開
Apr. 2020 - Mar. 2021 - 守秘義務のため非公開
Apr. 2020 - Mar. 2021 - 守秘義務のため非公開
Apr. 2020 - Mar. 2021 - 守秘義務のため非公開
Apr. 2020 - Mar. 2021 - 液晶応用製品としてのスマートウィンドウ
Apr. 2019 - Mar. 2021 - 守秘義務のため非公開
Apr. 2019 - Mar. 2020 - 守秘義務のため非公開
Apr. 2019 - Mar. 2020 - 守秘義務のため非公開
Apr. 2019 - Mar. 2020 - 守秘義務のため非公開
Oct. 2018 - Mar. 2020 - 守秘義務のため非公開
Apr. 2018 - Mar. 2019 - 守秘義務のため非公開
Apr. 2018 - Mar. 2019 - 守秘義務のため非公開
Apr. 2018 - Mar. 2019
Industrial Property Rights
- 特願17/794,048(PCT/JP2021/026990), LIQUID CRYSTAL DEVICE, OPTICAL SYSTEM, SPATIAL PHASE MODULATOR, AND LIQUID CRYSTAL DEVICE MANUFACTURING METHOD
Sakurai; Yasuki Nishitateno; Masashi Takatou; Koki Ito; Masahiro - 特願PCT/KR2021/010230, RESIN LAYER, RESIN LAYER PREPARATION METHOD, AND LIQUID CRYSTAL PANEL
- 特願PCT/JP2021/026990, 液晶デバイス、光学システム、空間位相変調器、及び液晶デバイスの製造方法
- 特願PCT/JP2021/022835, 光学素子及びアイウェア
- 特願2020-132159, 樹脂膜、樹脂膜の作成方法および液晶パネル
- 特願2020-104044, 光学素子及びアイウエア
- 特願2020-021227, 樹脂膜、樹脂膜の作成方法および液晶パネル
- 特願2016-256799, DNA-SWNT(DNAで被覆した単層カーボンナノチューブ)とフォトルミネッセンス測定法を用いた参加・還元反応の高感度・高速センシング
Social Contribution Activities
- 帝京平成大学オープンキャンパス模擬講義
09 Aug. 2025 - JFA 大宮アルディージャ対ベガルタ仙台 担架係
organizing_member
10 May 2025 - 帝京平成大学オープンキャンパス模擬講義
25 Aug. 2024 - 帝京平成大学オープンキャンパス模擬講義
20 Jul. 2024 - JFA 大宮アルディージャ対いわてグルージャ盛岡 担架係
organizing_member
29 Jun. 2024 - JFA 大宮アルディージャ対AC長野パルセイロ 担架係
organizing_member
01 Jun. 2024 - 帝京平成大学オープンキャンパス模擬講義
24 Mar. 2024 - JFA 大宮アルディージャ対V・ファーレン長崎 担架係
organizing_member
26 Aug. 2023 - JFA レノファ山口対町田ゼルビア 担架係
organizing_member
04 May 2022 - JFA レノファ山口対町田ゼルビア 担架係
organizing_member
11 Sep. 2021 - 真空ショー
15 Nov. 2018 - 15 Nov. 2018 - 明暗を自在にコントロールできる光～偏光について～
lecturer
24 Aug. 2018 - 24 Aug. 2018 - JFA 大宮アルディージャ対サンフレッチェ広島 担架係
organizing_member
20 Mar. 2016 - カーボンナノチューブの光学特性(仮)
demonstrator
29 Jan. 2014 - 31 Jan. 2014 - 極低温における液体ヘリウム（超流動）実習補助
demonstrator
Aug. 2005 - Aug. 2005 - 液体ヘリウムを使う超流動
demonstrator
20 Mar. 2005 - 21 Mar. 2005
Others
- 電気・電子工学実験ガイダンス資料
Sep. 2024 - 「情報リテラシー・DS概論」のための資料と、講義資料
Apr. 2024 - Lecture Materials for Electrical Engineering
Apr. 2023
It is an exercise material for students to solve electrical engineering problems. It is an explanation of the fundamentals of electrical engineering and a collection of problems. - 電気工学実験指導書「電気回路シミュレーション」
Apr. 2023
■Achievement List
Lectures, oral presentations, etc.
- Microscopic Near-Infrared Photoluminescence Detection of Micro-Sized Redox Biosensors Using Single-Walled Carbon Nanotubes
Yoshiki Tachikawa, Masahiro Ito, Kazuo Umemura, 26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024, 17 Oct. 2024 - 19 Oct. 2024, Not exist, English, Philippines, International conferences, Not International Collabolation, Verbal presentations (general), The Samahang Pisika ng Visayas at Mindanao (SPVM) ?The Physics Society of Southern Philippines, University of Santo toma, Manira, Philippines
Url - Recognition of biomolecules based on the difference in fluorescence emission of carbon nanotubes according to their chirality
Taiyo Hirose, Masahiro Ito, 26th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 18 Oct. 2024, 17 Oct. 2024 - 24 Oct. 2024, Not exist, English, Philippines, International conferences, Not International Collabolation, Verbal presentations (general), The Samahang Pisika ng Visayas at Mindanao (SPVM) ?The Physics Society of Southern Philippines, University of Santo Tomas, Manila, Philippines
Url - Micron-sized Single-Walled Carbon Nanotube Biosensor ~Quantitative detection of near-infrared photoluminescence response by biomolecule addition
Yoshiki Tachikawa, Masahiro Ito, Kazuo Umemura, 3rd international conference on advanced material characterization (AMC 2024), 24 Jul. 2024, 24 Jul. 2024 - 26 Jul. 2024, Not exist, English, Thailand, International conferences, Not International Collabolation, Poster sessions, SG LAB FORUM (Singapore based professional non-profit organization), BANGKOK, THAILAN
Url - 05 Apr. 2024, 05 Apr. 2024 - 05 Apr. 2024, Not exist, Japanese, Japan, Domestic conferences, Not International Collabolation, Poster sessions
Url - 11 Sep. 2023, 11 Sep. 2023 - 13 Sep. 2023, Not exist, Japanese, Japan, Domestic conferences, Not International Collabolation, Poster sessions
Url - 11 Sep. 2023, 11 Sep. 2023 - 13 Sep. 2023, Not exist, Japanese, Japan, Domestic conferences, Not International Collabolation, Poster sessions
Url - 11 Sep. 2023, 11 Sep. 2023 - 13 Sep. 2023, Not exist, Japanese, Japan, Domestic conferences, Not International Collabolation, Poster sessions
Url - 13 Sep. 2023, 11 Sep. 2023 - 13 Sep. 2023, Not exist, Japanese, Japan, Domestic conferences, Not International Collabolation, Verbal presentations (general)
Url
