研究者データベース
前橋 兼三MAEHASHI Kenzoマエハシ ケンゾウ
| ■所属部署名 | 工学研究院 先端物理工学部門 | |||
| ■職名 | 教授 | |||
Last Updated :2025/07/18
業績情報
氏名・連絡先
氏名
マエハシ ケンゾウ, 前橋 兼三, MAEHASHI Kenzoeメールアドレス
maehashi
cc.tuat.ac.jp個人ホームページ
http://web.tuat.ac.jp/~maehashi/index.html
主たる所属・職名
工学研究院 先端物理工学部門, 教授
その他の所属
教育・研究活動状況
- 疾病の早期発見、安心安全社会の実現のために、複雑な生体システムを計測・解析するナノデバイス開発を目指しています。特にグラフェンの微細構造と特殊な伝導特性に着目し、その製作技術、材料の基礎的研究および高感度センサ等の開発を行っています。
担当授業科目
- 特別ゼミII
2023年, 専門科目等 - 生体医用工学II
2023年, 専門科目等 - 臨床医学概論
2023年, 専門科目等 - 生体医用システム工学特別演習Ⅰ
2023年, 専門科目等 - 生体医用システム工学特別演習Ⅱ
2023年, 専門科目等 - 生体医用システム工学特別実験Ⅰ
2023年, 専門科目等 - 生体医用システム工学特別実験Ⅱ
2023年, 専門科目等 - 特別ゼミI
2023年, 専門科目等
科学研究費助成事業
- 基盤研究(B)
分子認識素子変調機構を有する高機能化グラフェンセンサの開発
自 2024年, 至 2026年 - 基盤研究(B)
人工嗅覚受容体ライブラリーを用いた嗅覚センサー開発
自 2022年, 至 2022年 - 基盤研究(B)
DNA機能化グラフェン素子による空中浮遊ウイルスの特異的センシング技術の開発
自 2021年, 至 2023年 - 基盤研究(B)
人工嗅覚受容体ライブラリーを用いた嗅覚センサー開発
自 2021年, 至 2021年 - 基盤研究(B)
エピタキシャルグラフェンによる電荷移動型FETバイオセンサの開発
自 2021年, 至 2021年 - 基盤研究(B)
エピタキシャルグラフェンによる電荷移動型FETバイオセンサの開発
自 2020年, 至 2020年 - 基盤研究(B)
人工嗅覚受容体ライブラリーを用いた嗅覚センサー開発
自 2020年, 至 2020年 - 基盤研究(B)
エピタキシャルグラフェンによる電荷移動型FETバイオセンサの開発
自 2019年, 至 2019年 - 新学術領域研究（研究領域提案型）
新規ナノカーボン材料の表面／界面修飾による特性制御とデバイス応用
自 2017年, 至 2017年 - 基盤研究(B)
機能化グラフェンアレイ構造を用いた高機能イメージバイオセンサの開発
自 2017年, 至 2017年 - 新学術領域研究（研究領域提案型）計画研究
新規ナノカーボン材料の表面／界面修飾による特性制御とデバイス応用
自 2016年, 至 2016年 - 基盤研究（B）
機能化グラフェンアレイ構造を用いた高機能イメージバイオセンサの開発
自 2016年, 至 2016年 - 基盤研究(B)
核形成位置制御法によるグラフェン素子の作製とインフルエンザウイルスの高感度検出
自 2015年, 至 2017年 - 新学術領域研究
新規ナノカーボン材料の表面／界面修飾による特性制御とデバイス応用
自 2015年, 至 2015年 - 基盤研究（B）
機能化グラフェンアレイ構造を用いた高機能イメージバイオセンサの開発
自 2015年, 至 2015年 - 新学術領域研究
新規ナノカーボン材料の表面／界面修飾による特性制御とデバイス応用
自 2014年, 至 2014年
論文
- Accumulation of photoinduced carriers at the SiO2/Si interface observed through graphene transport
Miura, Jin; Inamura, Fumiyuki; Ikuta, Takashi; Maehashi, Kenzo; Ikushima, Kenji
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP Publishing Ltd
The accumulation of photoinduced carriers at the SiO2/Si interface was observed via graphene transport. CVD graphene was transferred to a lightly p-doped silicon substrate with a SiO2 dielectric layer and served as a charge sensor for detecting the accumulation of photoinduced carriers at the SiO2/Si interface. The sample was cooled to 4.2 K to realize an undoped silicon substrate without intrinsic carriers. Photoexcited carriers in the undoped silicon substrate were collected at the SiO2/Si interface via a gate voltage and the carrier polarity was controlled well by the polarity of the gate voltage set during the light illumination. The photoinduced carrier density was determined by the number of photons incident on the silicon substrate with a photon-electron conversion efficiency of about 0.036. These results may provide polarity control of the conduction channel (n- or p-type) in standard Si-MOS structures, paving the way for optically programmable Si-CMOS.
2024年02月29日, 研究論文（学術雑誌）, 共同, 63, 2, 0021-4922, DOI(公開)(r-map) - Identification of Cadmium Compounds in a Solution Using Graphene-Based Sensor Array
Yoshii, Tomoya; Nishitsugu, Fuka; Kikawada, Kazuki; Maehashi, Kenzo; Ikuta, Takashi
SENSORS
MDPI
Rapid detection of heavy metals in solution is necessary to ensure human health and environmental protection. Some heavy-metal compounds are present in solution as compounds instead of as ions owing to their low ionization. Therefore, the development of sensor devices for the detection of heavy-metal compounds is important. In this study, as a proof of concept, we propose a sensor device using graphene and a chelating agent, which were used to develop an identification technique for three types of cadmium compounds. Pristine-graphene and two types of chelator-modified graphene-based sensors were successfully used to detect cadmium compounds at concentrations ranging from 50 to 1000 mu M. The detection time was less than 5 min. The three type of graphene-based sensors responded differently to each cadmium compound, which indicates that they detected cadmium as a cadmium compound instead of as cadmium ions. Furthermore, we successfully identified cadmium compounds by operating these three types of sensors as a sensor array on the same substrate. The results indicate that sensors that focus on heavy-metal compounds instead of heavy-metal ions can be used for the detection of heavy metals in solution.
2023年02月, 研究論文（学術雑誌）, 共同, 23, 3, DOI(公開)(r-map) - Organic Molecular Detection without Debye-Length Limitation by Desorption of Receptor from the Surface of a Graphene Field-Effect Transistor
Sakamoto, Yuri; Ikuta, Takashi; Maehashi, Kenzo
ACS APPLIED NANO MATERIALS
AMER CHEMICAL SOC
Charge-based detection of low concentrations of organic molecules using field-effect transistors (FETs) cannot distinguish between functional groups or detect charges beyond the Debye length. This study uses the desorption of modified molecules on the graphene surface, obtained by changing their solubility in water, to detect the target molecules on the graphene FETs. The thiol-ene reaction, which binds maleimide groups to thiol groups, is used to vary the solubility of the modified molecules in water. N-(1-Pyrenyl) maleimide (PMI) was modified on graphene to immobilize the maleimide groups on graphene in a pi-stack. The modification changed the potential of graphene and shifted the transfer characteristics in the positive direction. Next, a glutathione (GSH) solution rich in hydrophilic groups was introduced under UV irradiation. The reaction of PMI with GSH increased the water solubility of the former, and a relatively weak pi-stack was released, causing PMI to be desorbed from graphene. Consequently, the potential of graphene changed, and the transfer characteristics shifted in the negative direction. From this shift, the graphene FET detected the desorption of PMI from graphene. The FET detected at least 0.1 nM (3.8 pg) of GSH. This method detects the desorption of the modified molecules instead of the adsorption of target molecule having charge. The proposed method can detect low concentrations of target molecules in a solution while circumventing the electric double-layer effect that prevents the detection of charges outside the Debye length. The method can be applied to detect a variety of targets for higly sensitive sensors.
2022年10月28日, 研究論文（学術雑誌）, 共同, 5, 10, DOI(公開)(r-map), 15642, 15650 - 疾病の早期発見，安心安全社会の実現のためのグラフェンセンサ開発
前橋兼三、生田昂
表面技術
表面技術協会
2022年09月, （MISC）総説・解説（学術雑誌）, 共同, 73, 9, 439, 443 - Effect of changing electronic states of molecules on frequency domain of graphene FETs
Oketa, Tomohiro; Ikuta, Takashi; Masai, Hiroshi; Tamaki, Takashi; Terao, Jun; Maehashi, Kenzo
APPLIED PHYSICS EXPRESS
IOP Publishing Ltd
The high surface sensitivity of low-dimensional carbon nanomaterials renders them good candidates for noise detection. Herein, Mg-porphyrin-modified graphene field-effect transistors (FETs) were fabricated, and parts-per-billion concentrations of NO2 were introduced to the devices. When the power spectrum density (PSD) of the Mg-porphyrin-modified graphene was measured in NO2, a specific PSD change near 1000 Hz was observed. This change could be due to the change in the electrical state of Mg-porphyrin caused by NO2 adsorption. This study reveals that frequency-domain measurement of graphene FETs can be used to evaluate changes in the electronic state of molecules.
2022年04月01日, 研究論文（学術雑誌）, 共同, 15, 4, 1882-0778, DOI(公開)(r-map) - Turbostratic stacked graphene-based high-responsivity mid-wavelength infrared detector using an enhanced photogating effect
Shimatani, Masaaki; Ikuta, Takashi; Sakamoto, Yuri; Fukushima, Shoichiro; Ogawa, Shinpei; Maehashi, Kenzo
OPTICAL MATERIALS EXPRESS
OPTICAL SOC AMER
We employ turbostratic stacked chemical vapor deposition (CVD) graphene for a mid-wavelength infrared (MWIR) photodetector using the photogating effect. Turbostratic stacked CVD graphene was fabricated by multiple transfer processes. Graphene field effect transistor-based MWIR photodetectors were developed using an InSb substrate. The effect of the three layers of turbostratic stacked graphene enhanced both the field-effect mobility and MWIR response by approximately three times, compared to that of a conventional single-layer graphene photodetector in vacuum at 77 K. Our results may contribute to the realization of low-cost, mass-producible, high-responsivity graphene-based infrared sensors. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
2022年02月01日, 研究論文（学術雑誌）, 共同, 12, 2, 2159-3930, DOI(公開)(r-map), 458, 467 - Development of an odorant sensor with a cell-free synthesized olfactory receptor and a graphene field-effect transistor
Yoshii, Tomoya; Takayama, Ikumi; Fukutani, Yosuke; Ikuta, Takashi; Maehashi, Kenzo; Yohda, Masafumi
ANALYTICAL SCIENCES
SPRINGERNATURE
Animals sense odorants using olfactory receptors. Many trials have been conducted to develop artificial odorant sensors using olfactory receptors. However, the development has been hindered by the difficulty in obtaining olfactory receptors. In this study, we expressed an olfactory receptor, cOR52, using a wheat germ cell-free synthesis system. The functionality of the expressed cOR52 was confirmed by ligand concentration-dependent interactions with the mini-G protein. The expressed cOR52 was immobilized on a graphene field-effect transistor. The cOR52-modified graphene field-effect transistor exhibited a ligand-specific response between 100 nM and 100 mu M. This approach seems to be applicable for other olfactory receptors. Therefore, it will be possible to develop an odorant sensor equipped with various olfactory receptors by this method.
2022年02月, 研究論文（学術雑誌）, 共同, 38, 2, 0910-6340, DOI(公開)(r-map), 241, 245 - Electrical detection of ppb region NO2 using Mg-porphyrin-modified graphene field-effect transistors
Ikuta, Takashi; Tamaki, Takashi; Masai, Hiroshi; Nakanishi, Ryudai; Endo, Kitaro; Terao, Jun; Maehashi, Kenzo
NANOSCALE ADVANCES
ROYAL SOC CHEMISTRY
The trace detection of NO2 through small sensors is essential for air quality measurement and the health field; however, small sensors based on electrical devices cannot detect NO2 with the desired selectivity and quantitativity in the parts per billion (ppb) concentration region. In this study, we fabricated metalloporphyrin-modified graphene field-effect transistors (FETs). Mg-, Ni-, Cu-, and Co-porphyrins were deposited on the graphene FETs, and the transfer characteristics were measured. With the introduction of NO2 in the ppb concentration region, the FETs of pristine graphene and Ni-, Cu-, and Co-porphyrin-modified graphene showed an insufficient response, whereas the Mg-porphyrin-modified graphene exhibited large voltage shifts in the transport characteristics. This indicates that Mg-porphyrin acts as an adsorption site for NO2 molecules. An analysis of the Dirac-point voltage shifts with the introduction of NO2 indicates that the shifts were well-fitted with the Langmuir adsorption isotherm model, and the limit of detection for NO2 was found to be 0.3 ppb in N-2. The relationship between the mobility and the Dirac-point voltage shift with the NO2 concentration shows that the complex of NO2 and Mg-porphyrin behaves as a point-like charge impurity. Moreover, the Mg-porphyrin-modified graphene FETs show less response to other gases (O-2, H-2, acetic acid, trimethylamine, methanol, and hexane), thus indicating high sensitivity for NO2 detection. Furthermore, we successfully demonstrated the quantitative detection of NO2 in air, which is near the environmental standards. In conclusion, the results of the Mg-porphyrin-modified graphene FETs enable a rapid, easy, and selective detectability.
2021年10月12日, 研究論文（学術雑誌）, 共同, 3, 20, 2516-0230, DOI(公開)(r-map), 5793, 5800 - Electrical Detection of Molecular Transformations Associated with Chemical Reactions Using Graphene Devices
Sakamoto, Yuri; Ikuta, Takashi; Maehashi, Kenzo
ACS APPLIED MATERIALS & INTERFACES
AMER CHEMICAL SOC
This study proposes a method to electrically detect chemical reactions that involve bond changes through reactions on graphene surfaces. To achieve a highly sensitive detection, we focused on the thiol-ene reaction that combines the maleimide and thiol groups. Graphene field-effect transistors (FETs) were used to detect the binding changes of the modified molecules. Graphene has high carrier mobility and is sensitive to changes in the electronic state of its surface. Graphene has been used as a sensor to detect low-concentration targets with high sensitivity. N-(9-Acridinyl)maleimide (NAM) was chosen as the modified molecule to immobilize maleimide on graphene through pi-interaction, and methanethiol (MeSH) was set as the target thiol. The modification of NAM to graphene was first confirmed by attenuated total reflection Fourier transform infrared spectroscopy, and the modification density was 0.5 +/- 0.1/nm(2) through cyclic voltammetry. Owing to a bond exchange, the transfer characteristics of the graphene FET shifted by 2 V to the negative direction after being exposed to MeSH at 10 parts per billion (ppb), equivalent to 0.2 ng, under ultraviolet irradiation. With 5000 ppb of acetic acid, it only shifted 0.7 V. With 1000 ppb of ethanol and 10,000 ppb of methanol, it shifted to the positive direction by 0.4 and 0.6 V, respectively. Because the nontarget molecule showed only a slight response, a thiol-ene chemical reaction was detected. The proposed method can detect the bond-change reaction using an ultralow concentration of MeSH, which indicates that at least 10 ppb (or 0.2 ng) of MeSH was detected by the graphene FET.
2021年09月22日, 研究論文（学術雑誌）, 共同, 13, 37, 1944-8244, DOI(公開)(r-map), 45001, 45007 - Dirac-point Shift of Graphene-FET in the Presence of Ionic Molecules or Surfactants
Miyachi, Mariko; Zhu, Wenchao; Nakae, Toyotaka; Yamanoi, Yoshinori; Ikuta, Takashi; Maehashi, Kenzo; Nishihara, Hiroshi
CHEMISTRY LETTERS
CHEMICAL SOC JAPAN
We previously reported a light-sensing system composed of PSI (photosystem I) and graphene-FET (field effect transistor). The photoresponse could be observed only when surfactants and NaASC (sodium L-ascorbate) were added to the electrolyte. To clarify the properties of graphene-FET as a photosensor, the effect and mechanism of action of surfactants were investigated and discussed. Surfactants with longer alkyl chains can suppress undesired shifts in the Dirac point (charge neutrality point) induced by NaASC.
2021年09月, 研究論文（学術雑誌）, 共同, 50, 9, 0366-7022, DOI(公開)(r-map), 1639, 1642 - Electrical Biosensor Using Graphene Field-Effect Transistor and Small Receptor Molecules
Takao Ono, Yasushi Kanai, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, and Kazuhiko Matsumoto
Carbon Related Materials
2020年10月13日, 研究論文（学術雑誌）, 共同, DOI(公開)(r-map), 91, 101 - First-principles calculation of electronic structure of turbostratic graphene for high-responsivity infrared detection with enhanced photogating effect
Satoshi Okuda; Masaaki Shimatani, Shoichiro Fukushima, Shinpei Ogawa, Takashi Ikuta, and Kenzo Maehashi
Infrared Technology and Applications XLVI
2020年04月23日, 研究論文（学術雑誌）, 共同, DOI(公開)(r-map), 114071J - Ethanol Detection at the Parts per Billion Level with Single-Stranded-DNA-Modified Graphene Field-Effect Transistors
Nozaki, Ryo; Ikuta, Takashi; Ueno, Kinuko; Tsukakoshi, Kaori; Ikebukuro, Kazunori; Maehashi, Kenzo
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
WILEY-V C H VERLAG GMBH
For realizing the early diagnosis of diseases, detection of gases in exhaled breath in parts per billion (ppb) using compact devices is necessary. Herein, single-stranded-DNA-modified graphene field-effect transistors (FETs) are fabricated and the transfer characteristics are measured. The results reveal that shifts in the transfer characteristics are obtained by introducing ethanol gas at the ppb level, indicating that single-stranded-DNA-modified graphene FETs detect the gas at the ppb level. Moreover, by modifying DNA sequence 1 or sequence 2, the positive and negative voltage shifts of transfer characteristics are observed, respectively. In contrast, the shifts are hardly obtained using DNA sequence 3, which has a rigid conformation for adsorption of molecules. These differences in the behaviors of the transfer characteristics are attributed to the change in DNA conformation when gas is adsorbed. Therefore, single-stranded-DNA-modified graphene FETs have considerable potential to detect various gases at a low concentration depending on the design of DNA sequences, enabling their promising applications in disease diagnosis.
2020年02月, 研究論文（学術雑誌）, 共同, 257, 2, 0370-1972, DOI(公開)(r-map) - Selective Detection of Cu2+ Ions by Immobilizing Thiacalix[4]arene on Graphene Field-Effect Transistors
Takagiri, Yuki; Ikuta, Takashi; Maehashi, Kenzo
ACS OMEGA
AMER CHEMICAL SOC
Highly accurate quantitative detection of heavy metals is essential for environmental pollution monitoring and health safety. Here, for selective detection of Cu2+ ions with high sensitivity, thiacalix[4]arene (TCA) immobilized on graphene field-effect transistors (G-FETs) are developed. Our proposed TCA-immobilized G-FETs are successfully used to detect Cu2+ ions at concentrations ranging from 1 mu M to 1 mM via changes in their transfer characteristics. Moreover, the measured transfer characteristics clearly shift only when Cu2+ ions are introduced in the buffer solution despite it containing other metal ions, including those of Na+, Mg2+, Ni2+, and Cd2+; this selective detection of Cu2+ ions is attributed to the planar arrangement of TCA on graphene. Therefore, TCA-immobilized G-FETs selectively detect Cu2+ with high sensitivity.
2020年01月14日, 研究論文（学術雑誌）, 共同, 5, 1, 2470-1343, DOI(公開)(r-map), 877, 881 - High-responsivity turbostratic stacked graphene photodetectors using enhanced photogating
Shimatani, Masaaki; Yamada, Naoki; Fukushima, Shoichiro; Okuda, Satoshi; Ogawa, Shinpei; Ikuta, Takashi; Maehashi, Kenzo
APPLIED PHYSICS EXPRESS
IOP PUBLISHING LTD
High-responsivity graphene photodetectors were fabricated using turbostratic stacked graphene, which provided enhanced photogating. Photogating is a promising means of increasing the responsivity of graphene photodetectors, and this effect is proportional to carrier mobility. Turbostratic stacked graphene exhibits higher carrier mobility than conventional monolayer graphene because it has the same band structure as monolayer graphene while preventing scattering by the underlying SiO2 layer. The photoresponse of these devices at a wavelength of 642;nm was approximately twice that obtained for a conventional monolayer graphene photodetector. The results reported show the feasibility of producing high-responsivity graphene-based photodetectors using a simple fabrication technique.
2019年12月01日, 研究論文（学術雑誌）, 共同, 12, 12, 1882-0778, DOI(公開)(r-map) - Photosensing System Using Photosystem I and Gold Nanoparticle on Graphene Field-Effect Transistor
Nishiori, Daiki; Zhu, Wenchao; Salles, Raphael; Miyachi, Mariko; Yamanoi, Yoshinori; Ikuta, Takashi; Maehashi, Kenzo; Tomo, Tatsuya; Nishihara, Hiroshi
ACS APPLIED MATERIALS & INTERFACES
AMER CHEMICAL SOC
In this study, a light sensor is fabricated based on photosystem I (PSI) and a graphene field-effect transistor (FET) that detects light at a high quantum yield under ambient conditions. We immobilized PSI on a micrometer- sized graphene FET using Au nanoparticles (AuNPs) and measured the I-V characteristics of the modified graphene FET before and after light irradiation. The source-drain current (I-sd) increased upon illumination, exhibiting a photoresponsivity of 4.8 x 10(2) A W-1, and the charge neutrality point of graphene shifted by -12 mV. This system represents the first successful photosensing system based on proteins and a solution-gated graphene FET. The probable mechanism of this negative shift can be explained by the increase in negative charge carriers in graphene induced by a hole trap in the AuNP resulting from electron transfer from the AuNP to PSI. Photoresponses were only observed in the presence of two surface-active agents, n-hexyltrimethylammonium bromide and sodium dodecylbenzenesulfonate, because they caused the formation of a hydrophobic environment on the surface of the graphene. The lipid layer of these agents caused dissociation of ascorbate ions from the graphene sheet, thereby expanding the Debye screening length of the electrolyte solution. The hydrophobic environment above graphene also enhanced hole storage in the AuNP through electron transfer from the AuNP to PSI.
2019年11月13日, 研究論文（学術雑誌）, 共同, 11, 45, 1944-8244, DOI(公開)(r-map), 42773, 42779 - Effective binding of sugar chains to influenza virus on the surface by bovine serum albumin localization
Kawahara, Toshio; Hiramatsu, Hiroaki; Ohmi, Yuhsuke; Sriwilaijaroen, Nongluk; Suzuki, Yasuo; Nakakita, Shin-ichi; Watanabe, Yohei; Ohno, Yasuhide; Maehashi, Kenzo; Ono, Takao; Kanai, Yasushi; Matsumoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
The spread of influenza A virus variants requires continuous monitoring because of the high mutation rate. Given that the surveillance of such mutations is essential, the development and use of highly sensitive sensor systems is required. Host changes can manifest as changes in the binding between viral protein and host sugar chains. We employed sugar chains possessing different coordinations of terminal sialic acid and penultimate galactose groups as detection molecules. To enhance sensitivity, we developed an approach that controls the dispersion of molecules using bovine serum albumin (BSA) localization, and it was found that stable distribution was achieved. Several sugar chains were localized at fixed points on the BSA. The active sugar chain on BSA possessed suitable height as observed by atomic force microscopy. The clustering of sugar chains could also enhance the binding activity. Thus, we were able to enhance the sensitivity and availability of the detection of molecules. (C) 2019 The Japan Society of Applied Physics
2019年08月01日, 研究論文（国際会議プロシーディングス）, 共同, 58, 0021-4922, DOI(公開)(r-map) - Effect of Clustering on the Fluctuation in Binding Activity of Sugar Chains to Influenza Viruses
Toshio Kawahara, S. K. Rupesh, Yasuhide Ohno, Kenzo Maehashi, Kazuhiko Matsumoto, Kazumasa Okamoto, Risa Utsunomiya, Teruaki Matsuba
Proc. 25th International Conference on Noise and Fluctuations
2019年06月18日, 研究論文（国際会議プロシーディングス）, 共同, 248, 251 - Large deformation and rapid response of spatial light modulators fabricated with suspended polymer
Hanabusa, Yuki; Ikuta, Takashi; Maehashi, Kenzo
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
We have fabricated polymer-based spatial light modulators (SLMs) with suspended polymer structures using a dry transfer technique. By applying a driving voltage, modulation of the diffracted light was observed and operation of the SLMs was demonstrated at 1-1000 Hz. At low frequency, response signals based on the viscoelastic properties were observed. On the other hand, at high frequency, a rapid response was obtained owing to the transition of the elastic properties of the polymer. Furthermore, with increasing driving voltage, the deformation depth of the suspended polymer increased and reached approximately 700 nm. Therefore, suspended-polymer-based SLMs are easily fabricated and will operate with a fast response using infrared light. (c) 2019 The Japan Society of Applied Physics
2019年06月01日, 研究論文（国際会議プロシーディングス）, 共同, 58, 0021-4922, DOI(公開)(r-map) - Influence of DNA Sequences on Gas Responses Using DNA-modified Graphene Devices
Ryo Nozaki, Takashi Ikuta, Kinuko Ueno, Kaori Tsukakoshi, Kazunori Ikebukuro, and Kenzo Maehash
Proc. Compound Semiconductor Week
2019年05月19日, 研究論文（国際会議プロシーディングス）, 共同, DOI(公開)(r-map), 18971276 - Effects of low temperature buffer on carbon nano wall's growth
Singh, Rupesh; Kawahara, Toshio; Ohmi, Yuhsuke; Ohno, Yasuhide; Maehashi, Kenzo; Matsumoto, Kazuhiko; Okamoto, Kazumasa; Utsunomiya, Risa; Yoshimura, Masamichi
MATERIALS TODAY COMMUNICATIONS
ELSEVIER SCIENCE BV
Here we introduce the application of low temperature buffer (LTB) layer for the growth of carbon nano walls (CNW) by plasma enhanced chemical vapor deposition (PECVD) method. The facilitation by LTB on the growth of CNW was investigated. The measured electrical properties showed that CNW grown on LTB (L-CNW) has enhanced electrical characteristics compared to as-grown CNW (as-CNW). Raman spectra of L-CNW were compared with as-CNW. The de-convoluted graphitic peaks showed a small deviation from the mean value with regard to change in deposition conditions. The comparison showed enhanced film quality for L-CNW and the graphitization appeared to be more prominent. Moreover, the LTB layer improved the self-alignment of CNWs that enables them to be used as metallic electrodes in surface acoustic wave (SAW) devices and transducers.
2018年12月, 研究論文（学術雑誌）, 共同, 17, 2352-4928, DOI(公開)(r-map), 94, 99 - Development of glutamate biosensor based on the integration on network SWCNT-FET and glutamate-binding protein
Nguyen T. Tung, Trisha D. Farha, Hidekazu Tsutsui, Truong T.N. Lien, Yasuhide Ohno, Kenzo Maehashi, Kazuhiko Matsumoto, Manish Biyani, Phan T. Tue, Yuzuru Takamura
Micro-TAS
2018年11月11日, 共同, 2018, 795, 797 - High-sensitive and selective detection of human-infectious influenza virus using biomimetic graphene field-effect transistor
Takao Ono, Takuya Kawata, Yasushi Kanai, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, Yohei Watanabe, Shin-ichi Nakakita, Yasuo Suzuki, Toshio Kawahara, and Kazuhiko Matsumoto
Device Research Conference - Conference Digest
2018年06月24日, 共同, 2018, 8442255 - Improved sensitivity of a graphene FET biosensor using porphyrin linkers
Kawata, Takuya; Ono, Takao; Kanai, Yasushi; Ohno, Yasuhide; Maehashi, Kenzo; Inoue, Koichi; Matsumoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
Graphene FET (G-FET) biosensors have considerable potential due to the superior characteristics of graphene. Realizing this potential requires judicious choice of the linker molecule connecting the target-specific receptor molecule to the graphene surface, yet there are few reports comparing linker molecules for G-FET biosensors. In this study, tetrakis(4-carboxyphenyl) porphyrin (TCPP) was used as a linker for surface modification of a G-FET and the properties of the device were compared to those of a G-FET device modified with the conventional linker 1-pyrenebutanoic acid succinimidyl ester (PBASE). TCPP modification resulted in a higher density of receptor immunoglobulin E (IgE) aptamer molecules on the G-FET. The detection limit of the target IgE was enhanced from 13nM for the PBASE-modified G-FET to 2.2nM for the TCPP-modified G-FET, suggesting that the TCPP linker is a powerful candidate for G-FET modification. (C) 2018 The Japan Society of Applied Physics
2018年06月, 研究論文（学術雑誌）, 共同, 57, 6, 0021-4922, DOI(公開)(r-map) - Palladium configuration dependence of hydrogen detection sensitivity based on graphene FET for breath analysis
Sakamoto, Yuri; Uemura, Kohei; Ikuta, Takashi; Maehashi, Kenzo
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
We have succeeded in fabricating a hydrogen gas sensor based on palladium-modified graphene field-effect transistors (FETs). The negative-voltage shift in the transfer characteristics was observed with exposure to hydrogen gas, which was explained by the change in work function. The hydrogen concentration dependence of the voltage shift was investigated using graphene FETs with palladium deposited by three different evaporation processes. The results indicate that the hydrogen detection sensitivity of the palladium-modified graphene FETs is strongly dependent on the palladium configuration. Therefore, the palladium-modified graphene FET is a candidate for breath analysis. (C) 2018 The Japan Society of Applied Physics.
2018年04月, 研究論文（国際会議プロシーディングス）, 共同, 57, 4, 0021-4922, DOI(公開)(r-map) - Solid State Devices and Materials FOREWORD
Kageshima, Hiroyuki; Hosoi, Takuji; Iwamoto, Satoshi; Arie, Takayuki; Fujino, Masahisa; Fukuzaki, Yuzo; Harada, Syunta; Ikegami, Masashi; Iwamuro, Noriyuki; Johguchi, Koh; Kakushima, Kuniyuki; Kanaya, Haruichi; Kikuchi, Akihiko; Kinoshita, Kentaro; Kuroda, Rihito; Kurokawa, Yasuyoshi; Maehashi, Kenzo; Maekawa, Keiichi; Makino, Toshiharu; Matsushima, Toshinori; Miyata, Toshitaka; Morioka, Hiroshi; Morioka, Hiroshi; Murugesan, Mariappan; Nagashio, Kosuke; Nagata, Takahiro; Nakatsuka, Osamu; Nishiyama, Nobuhiko; Oiwa, Akira; Okada, Hiroyuki; Ono, Teruo; Sakamoto, Toshitsugu; Sakata, Toshiya; Shirao, Mizuki; Sukegawa, Kazuo; Suzuki, Toshikazu; Suzuki, Hidetoshi; Taima, Tetsuya; Tanaka, Tetsu; Tatsuoka, Kohichi; Tawara, Takehiko; Tsuda, Kunio; Yamamoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
2018年04月, 研究論文（学術雑誌）, 共同, 57, 4, 0021-4922, DOI(公開)(r-map) - Turbostratic stacked CVD graphene for high-performance devices
Uemura, Kohei; Ikuta, Takashi; Maehashi, Kenzo
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
We have fabricated turbostratic stacked graphene with high-transport properties by the repeated transfer of CVD monolayer graphene. The turbostratic stacked CVD graphene exhibited higher carrier mobility and conductivity than CVD monolayer graphene. The electron mobility for the three-layer turbostratic stacked CVD graphene surpassed 10,000cm(2)V(-1)s(-1) at room temperature, which is five times greater than that for CVD monolayer graphene. The results indicate that the high performance is derived from maintenance of the linear band dispersion, suppression of the carrier scattering, and parallel conduction. Therefore, turbostratic stacked CVD graphene is a superior material for high-performance devices. (C) 2018 The Japan Society of Applied Physics
2018年03月, 研究論文（学術雑誌）, 共同, 57, 3, 0021-4922, DOI(公開)(r-map) - Graphene Surface Acoustic Wave Sensor for Simultaneous Detection of Charge and Mass
Okuda, Satoshi; Ono, Takao; Kanai, Yasushi; Ikuta, Takashi; Shimatani, Masaaki; Ogawa, Shinpei; Maehashi, Kenzo; Inoue, Koichi; Matsumoto, Kazuhiko
ACS SENSORS
AMER CHEMICAL SOC
We have combined a graphene field-effect transistor (GFET) and a surface acoustic wave (SAW) sensor on a LiTaO3 substrate to create a graphene surface acoustic wave (GSAW) sensor. When a SAW propagates in graphene, an acoustoelectric current (I-A) flows between two attached electrodes. This current has unique electrical characteristics, having both positive and negative peak values with respect to the electrolyte-gate voltage (V-Eg) in solution. We found that I-A is controlled by V-Eg and the amplitude of the SAW. It was also confirmed that the GSAW sensor detects changes of electrical charge in solution like conventional GFET sensors. Furthermore, the detection of amino-group-modified microbe ads was performed by employing a GSAW sensor in a phthalate buffer solution at pH 4.1. The hole current peak shifted to the lower left in the I-A-V-Eg characteristics. The left shift was caused by charge detection by the GFET and can be explained by an increase of amino groups that have positive charges at pH 4.1. In contrast, the downward shift is thought to be due to a reduction in the amplitude of the propagating SAW because of an increase in the mass loading of microbeads. This mass loading was detected by the SAW sensor. Thus, we have demonstrated that the GSAW sensor is a transducer capable of the simultaneous detection of charge and mass, which indicates that it is an attractive platform for highly sensitive and multifunctional solution sensing.
2018年01月, 研究論文（学術雑誌）, 共同, 3, 1, 2379-3694, DOI(公開)(r-map), 200, 204 - Peptide aptamer-modified single-walled carbon nanotube-based transistors for high-performance biosensors
Nguyen Thanh Tung; Phan Trong Tue; Truong Thi Ngoc Lien; Ohno, Yasuhide; Maehashi, Kenzo; Matsumoto, Kazuhiko; Nishigaki, Koichi; Biyani, Manish; Takamura, Yuzuru
SCIENTIFIC REPORTS
NATURE PUBLISHING GROUP
Biosensors employing single-walled carbon nanotube field-effect transistors (SWCNT FETs) offer ultimate sensitivity. However, besides the sensitivity, a high selectivity is critically important to distinguish the true signal from interference signals in a non-controlled environment. This work presents the first demonstration of the successful integration of a novel peptide aptamer with a liquid-gated SWCNT FET to achieve highly sensitive and specific detection of Cathepsin E (CatE), a useful prognostic biomarker for cancer diagnosis. Novel peptide aptamers that specifically recognize CatE are engineered by systemic in vitro evolution. The SWCNTs were firstly grown using the thermal chemical vapor deposition (CVD) method and then were employed as a channel to fabricate a SWCNT FET device. Next, the SWCNTs were functionalized by noncovalent immobilization of the peptide aptamer using 1-pyrenebutanoic acid succinimidyl ester (PBASE) linker. The resulting FET sensors exhibited a high selectivity (no response to bovine serum albumin and cathepsin K) and label-free detection of CatE at unprecedentedly low concentrations in both phosphate-buffered saline (2.3 pM) and human serum (0.23 nM). Our results highlight the use of peptide aptamer-modified SWCNT FET sensors as a promising platform for near-patient testing and point-of-care testing applications.
2017年12月, 研究論文（学術雑誌）, 共同, 7, 2045-2322, DOI(公開)(r-map) - Lab-on-a-Graphene: Functionalized Graphene Transistors and Their Application for Biosensing
Takao Ono, Yasushi Kanai, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, and Kazuhiko Matsumoto
Carbon-related Materials in Recognition of Nobel Lectures
Springer
2017年09月01日, 研究論文（学術雑誌）, 共同, DOI(公開)(r-map), 79, 90 - Dynamical thermodiffusion model of graphene synthesis on polymer films by laser irradiation and application to strain sensors
Kanai, Yasushi; Ishibashi, Yusuke; Ono, Takao; Inoue, Koichi; Ohno, Yasuhide; Maehashi, Kenzo; Matsumoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
A method of graphene synthesis at a desired position on polymer substrates by laser irradiation has been studied. Polyethylene naphthalate films were used as substrates, on which a thin Ni film was deposited as a catalyst layer. The irradiation of a focused laser made a hole in the Ni film and the graphene was synthesized in the hole by the surface decomposition of the polymer. The laser power dependence of the hole radius was successfully explained by a dynamical model of thermodiffusion. The quality of the laser-synthesized graphene was studied by micro-Raman scattering. Typical ambipolar characteristics of the synthesized graphene were observed in field-effect transistors. We studied the application of the laser-synthesized graphene to strain sensors using the sensitivity of the electric conductance to the strain induced by the bending deformation of substrates. (C) 2017 The Japan Society of Applied Physics
2017年07月, 研究論文（学術雑誌）, 共同, 56, 7, 0021-4922, DOI(公開)(r-map) - The effects of the plasma process for the self-aligned nano-carbon field effect transistors
Toshio Kawahara, S. K. Rupesh, Yasuhide Ohno, Kenzo Maehashi, Kazuhiko Matsumoto, Kazumasa Okamoto, Risa Utsunomiya, Teruaki Matsuba
Proc. 24th International Conference on Noise and Fluctuations
2017年07月, 研究論文（学術雑誌）, 共同, *, * - Zero-bias conductance anomaly in graphene dots
Kanai, Yasushi; Almokhtar, Mohamed; Ono, Takao; Ohno, Yasuhide; Maehashi, Kenzo; Inoue, Kouichi; Matsumoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
We report the Kondo effect in graphene quantum dots. We fabricated graphene quantum dots using CVD graphene. We measured the graphene quantum dots at 20mK in a dilution refrigerator. We detected a zero-bias conductance peak in the Coulomb blockade regime. The zero-bias conductance peak was suppressed under magnetic fields, which indicates the Kondo effect. We evaluated the Kondo temperatures of 4.8K from the zero-bias peak and 3.2K from the tunnel coupling and the charging energy. (C) 2017 The Japan Society of Applied Physics
2017年06月, 研究論文（学術雑誌）, 共同, 56, 6, 0021-4922, DOI(公開)(r-map) - Glycan-functionalized graphene-FETs toward selective detection of human-infectious avian influenza virus
Ono, Takao; Oe, Takeshi; Kanai, Yasushi; Ikuta, Takashi; Ohno, Yasuhide; Maehashi, Kenzo; Inoue, Koichi; Watanabe, Yohei; Nakakita, Shin-ichi; Suzuki, Yasuo; Kawahara, Toshio; Matsumoto, Kazuhiko
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
There are global concerns about threat of pandemic caused by the human-infectious avian influenza virus. To prevent the oncoming pandemic, it is crucial to analyze the viral affinity to human-type or avian-type sialoglycans with high sensitivity at high speed. Graphene-FET (G-FET) realizes such high-sensitive electrical detection of the targets, owing to graphene's high carrier mobility. In the present study, G-FET was functionalized using sialoglycans and employed for the selective detection of lectins from Sambucus sieboldiana and Maackia amurensis as alternatives of the human and avian influenza viruses. Glycan-functionalized G-FET selectively monitored the sialoglycan-specific binding reactions at subnanomolar sensitivity. (C) 2017 The Japan Society of Applied Physics
2017年03月, 研究論文（学術雑誌）, 共同, 56, 3, 0021-4922, DOI(公開)(r-map) - Development of Nano-Carbon Biosensors Using Glycan for Host Range Detection of Influenza Viru
Toshio Kawahara, Hiroaki Hiramatsu, Yasuo Suzuki, Shin-ichi Nakakita, Yasuhide Ohno, Kenzo Maehashi, Kazuhiko Matsumoto, Kazumasa Okamoto, Teruaki Matsuba, and Risa Utsunomiya
Condens. Matter
2016年12月, 研究論文（学術雑誌）, 共同, 1, 7 - グラフェンを用いたバイオセンシング ―DNA検出からインフルエンザ診断まで―
小野尭生、金井康、大野恭秀、前橋兼三、井上恒一、松本和彦
MATERIAL STAGE
2016年08月, 共同, 16, 8, 65, 70 - Graphene device array using transfer-free patterned growth on insulator for an electrolyte-gated sensor
Takashi Ikuta, Takeshi Oe, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, Kazuhiko Matsumoto
Thin Solid Films
2016年08月, 研究論文（学術雑誌）, 共同, 612, 87, 90 - Acoustic carrier transportation induced by surface acoustic waves in graphene in solution
Satoshi Okuda, Takashi Ikuta, Yasushi Kanai, Takao Ono, Shinpei Ogawa, Daisuke Fujisawa, Masaaki Shimatani, Koichi Inoue, Kenzo Maehashi, and Kazuhiko Matsumoto
Appl. Phys. Express
2016年04月, 研究論文（学術雑誌）, 共同, 9, 045104 - Utilizing research into electrical double layers as a basis for the development of label-free biosensors based on nanomaterial transistors
Kenzo Maehashi, Yasuhide Ohno, and Kazuhiko Matsumoto
Nanobiosensors in Disease Diagnosis
2016年01月, 研究論文（学術雑誌）, 共同, 5, 1, 13 - Noise spectroscopy of self-aligned carbon nanowalls
Toshio Kawahara, Yasuhide Ohno, Kenzo Maehashi, Kazuhiko Matsumoto, Kazumasa Okamoto, Risa Utsunomiya, and Teruaki Matsuba
Proc. 23rd International Conference on Noise and Fluctuations
2015年06月, 研究論文（学術雑誌）, 共同, 23, 108–111 - Carbon nanotube single-electron transistors with single-electron charge storages
Kohei Seike, Yasushi Kanai, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, and Kazuhiko Matsumoto
Jpn. J. Appl. Phys.
2015年04月, 研究論文（学術雑誌）, 共同, 54 - Graphene-FET-based gas sensor properties depending on substrate surface conditions
Masatoshi Nakamura, Yasushi Kanai, Yasuhide Ohno, Kenzo Maehashi, Koichi Inoue, and Kazuhiko Matsumoto
Jpn. J. Appl. Phys.
2015年04月, 研究論文（学術雑誌）, 共同, 54, 06FF11/1, 4 - グラフェンデバイスによるバイオセンサへの応用
前橋兼三、松本和彦
BIOINDUSTRY
2015年01月, 共同, 32, 1, 29, 34
著書
研究発表、招待講演等
- グラフェンの合成とセンサを中心にした機能性デバイスの開発
サイエンス＆テクノロジー(2022)
2022年01月26日, 口頭発表（招待・特別） - ナノカーボンのCVD 選択成長とデバイス応用
化学工学会 第32回シンポジウム
2020年11月20日, 口頭発表（招待・特別） - Development of graphene-based highly sensitive sensors
1 & 2DM Conference & Exhibition
2020年01月28日, 口頭発表（招待・特別） - Nanocarbon-based electronic devices and applications
The Second International Conference of Polymeric and Organic Materials
2019年12月18日, 口頭発表（招待・特別） - グラフェンの合成と機能デバイスの新展開
CMCリサーチ
2019年11月27日, 口頭発表（招待・特別） - 機能化グラフェンデバイスを用いたバイオセンシング
応用物理学会秋季学術講演会
2019年09月20日, 口頭発表（招待・特別） - グラフェンデバイスを用いたバイオセンシング
電気化学秋季大会
2019年09月05日, 口頭発表（招待・特別） - Biosensors using graphene-based devices
Graphene 2019
2019年06月26日, 口頭発表（招待・特別） - High-performance graphene devices and applications to biological sensors
EU-Japan Symposium on Application of Graphene and Related 2D Materials
2018年11月22日, 口頭発表（招待・特別） - High-performance graphene devices and applications
Nanotech Malaysia 2018
2018年05月07日, 口頭発表（招待・特別） - 「グラフェンの特性および合成と応用技術」～センサー開発を中心として～
「グラフェンの基礎（構造・特性・作製）と量産技術および応用展開」
2017年10月27日, 口頭発表（招待・特別） - Zero-Bias Conductance Anomaly in Graphene dots
99th International Conference on Nanoscience, Nanotechnology and Advanced Materials
2016年12月27日, その他 - Comparison of Sugar Chains of Sialylglycopeptide and Sialyllactose for the Application of Influenza Bio Sensor
24th International Colloquium on Scanning Probe Microscopy
2016年12月15日, その他 - カーボンナノウォールFET のためのプラズマプロセス
2016 年真空・表面科学合同講演会
2016年11月30日, その他 - インフルエンザウイルス変異監視デバイス開発のための糖鎖分子の検討
日仏生物学会 第185回例会
2016年11月26日, その他 - Plasma process for the improvements of device characteristics for self-aligned nano-carbon FETs
38th International Symposium on Dry Process
2016年11月21日, その他 - Platform for Electrical Measurement of π-Conjugated Polymer Wire with Graphene Nanogap Electrodes
29th Int. Microprocesses and Nanotechnology Conference
2016年11月11日, その他 - Kondo Effect in Graphene Quantum Dots
29th Int. Microprocesses and Nanotechnology Conference
2016年11月11日, その他 - Neuraminidase Assay using Glycan-Functionalized Graphene Field-Effect Transistors
AVS 63rd International Symposium and Exhibition
2016年11月07日, その他 - グラフェンを用いた P3HT 分子ワイヤデバス評価
第7回分子アーキテクトロニクス研究会
2016年10月21日, その他 - グラフェン電極を用いたポリチオフェン分子トランジスタの開発
第7回分子アーキテクトロニクス研究会
2016年10月21日, 口頭発表（招待・特別） - Developments of the nano-carbon bio sensors using glycan for influenza virus
13th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures
2016年10月06日, その他 - Electrical detection of biomolecules using graphene-based devices
PRiME 2016
2016年10月05日, 口頭発表（招待・特別） - Measurement of Enzyme Molecules and Their Reactions Using Graphene-FET Equipped with Microwells
2016 Int. Conf. Solid State Devices and Materials
2016年09月27日, その他 - グラフェン表面弾性波デバイスの溶液中での音響電流制御
第76回応用物理学会秋季学術講演会
2016年09月15日, その他 - ポルフィリンリンカーを用いたグラフェンバイオセンサーの高感度化
第76回応用物理学会秋季学術講演会
2016年09月15日, その他 - グラフェン電界効果トランジスタ上に捕捉した酵素分子の高感度検出
第76回応用物理学会秋季学術講演会
2016年09月15日, その他 - 糖鎖機能化グラフェンFETを用いた抗ウイルス薬効評価のためのノイラミニダーゼ反応計測
第76回応用物理学会秋季学術講演会
2016年09月15日, 口頭発表（招待・特別） - インフルエンザバイオセンサー開発のための糖鎖分子の検討
第76回応用物理学会秋季学術講演会
2016年09月14日, その他 - グラフェン電極を有したP3HT分子ワイヤデバイス
第76回応用物理学会秋季学術講演会
2016年09月14日, その他 - An Application of Graphene Field Effect Transistor to Enzymatic Assay
The 43rd International Symposium on Compound Semiconductor
2016年06月25日, その他 - Detection Kondo effect in Graphene Quantum Dots
The 43rd International Symposium on Compound Semiconductor
2016年06月24日, その他 - Development of highly sensitive sensors based on graphene devices
Tech Scouting Japan
2016年04月25日, 口頭発表（招待・特別） - Position-Controlled graphene Synthesis and Development of Biological Sensors and Molecular Devices
The 11th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems
2016年04月18日, 口頭発表（招待・特別） - Development of biological sensors based on graphene transistors
Global Innovation Research Organization Int. Symp.
2016年03月23日, 口頭発表（一般） - Study on peptide-functionalized single–walled carbon nanotube field effect transistor for aptasensor
第63回応用物理学会春季学術講演会
2016年03月21日, その他 - CVD グラフェンを用いた高感度ストレスセンサの開発
第63回応用物理学会春季学術講演会
2016年03月21日, その他 - 糖鎖機能化グラフェンFET を用いたノイラミニダーゼ反応計測
第63回応用物理学会春季学術講演会
2016年03月21日, その他 - 糖鎖機能化グラフェンFET を用いたノイラミニダーゼ反応計測
第63回応用物理学会春季学術講演会
2016年03月21日, その他 - エッチングフリーな単結晶グラフェンデバイスアレイの作製
第63回応用物理学会春季学術講演会
2016年03月20日, その他 - ウイルス検出のための糖鎖機能化グラフェンFET の修飾糖鎖の検討
第63回応用物理学会春季学術講演会
2016年03月20日, その他 - グラフェンFET を用いた酵素反応計測とピロリ菌検出への応用
第63回応用物理学会春季学術講演会
2016年03月19日, その他 - Electrical Detection of Polymerase Chain Reaction Using Graphene Field-Effect Transistors
28th Int. Microprocesses and Nanotechnology Conference
2015年11月13日, その他 - Position-Controlled Graphene Growth Using Micropatterning on Catalytic Copper Surface
28th Int. Microprocesses and Nanotechnology Conference
2015年11月13日, その他 - Polythiophene-Molecular-Based Transistor with Graphene Nanogap Electrodes
28th Int. Microprocesses and Nanotechnology Conference
2015年11月13日, その他 - Graphen synthesis and development of graphene-based biological sensors
11th Topical Workshop on Heterostructure Microelectronics
2015年11月11日, 口頭発表（招待・特別） - レドックス分子を用いたグラフェンメモリ
第6回分子アーキテクトロニクス研究会
2015年10月24日, ポスター発表 - グラフェン電極を用いたポリチオ分子トジスタの開発
第6回分子アーキテクトロニクス研究会
2015年10月24日, ポスター発表 - 分子の酸化還元応答を利用したグラフェンメモリの開発
第76回応用物理学会春季学術講演会
2015年09月16日, その他 - 低温バッファー層を用いたCNW-FETのノイズ解析
第76回応用物理学会春季学術講演会
2015年09月16日, その他 - Influence of post-annealing process on single-walled carbon nanotube growth and its application for biosensing
第76回応用物理学会春季学術講演会
2015年09月16日, その他 - 糖鎖機能化グラフェンFETを用いたインフルエンザウイルス由来ヘマグルチニンの検出
第76回応用物理学会春季学術講演会
2015年09月15日, その他 - グラフェンナノギャップ電極を用いた分子デバイスの作製
第76回応用物理学会春季学術講演会
2015年09月15日, その他 - ピロリ菌検出のためのグラフェンFETバイオデバイス
第76回応用物理学会春季学術講演会
2015年09月15日, その他 - 電流アニーリングによるグラフェン量子ドットの作製
第76回応用物理学会春季学術講演会
2015年09月15日, その他 - 銅触媒表面のマイクロパターニングによるグラフェンの位置制御成長
第76回応用物理学会春季学術講演会
2015年09月14日, その他 - ポリマーフィルム上のグラフェン直接合成とフレキシブルデバイス応用
第76回応用物理学会春季学術講演会
2015年09月14日, 口頭発表（招待・特別） - Memory effect of redox state on graphene/Al2O3 bilayer
International Workshop on Molecular Architectonics
2015年08月04日, ポスター発表 - グラフェンの特性と応用技術 ～バイオセンサーの開発～
情報機構
2015年07月24日, 口頭発表（招待・特別） - グラフェンのバイオセンサーへの応用とグラフェン合成
ニューダイヤモンドフォーラム
2015年07月23日, 口頭発表（招待・特別） - Direct Graphene Synthesis on Polymer Films and its Application to Flexible Devices
73rd Device Research Conference
2015年06月22日, ポスター発表 - 単層グラフェンを上部電極に利用した単分子膜素子の作製
第62回応用物理学会春季学術講演会
2015年03月14日, その他 - 三脚構造分子をリンカーとしたアプタマー修飾グラフェンFETを用い たIgE検出
第62回応用物理学会春季学術講演会
2015年03月14日, その他 - グラフェン光検出器の高感度化に向けた構造検討
第62回応用物理学会春季学術講演会
2015年03月14日, その他 - グラフェン電極を用いたポリチオフェン誘導体の伝達特性評
第62回応用物理学会春季学術講演会
2015年03月13日, その他 - 糖鎖修飾グラフェンFETを用いたインフルエンザウイルスセンサの開発
第62回応用物理学会春季学術講演会
2015年03月12日, その他 - プラステックフレキシブル基板上でのグラフェン直接合成
第62回応用物理学会春季学術講演会
2015年03月12日, その他 - イオン液体による電気二重層ゲートを用いたカーボンナノチューブ単電子トランジスタの量子状態の制御
第62回応用物理学会春季学術講演会
2015年03月12日, その他 - 修飾したグラフェンFETとDNAの結合および脱離の電気的検出
第62回応用物理学会春季学術講演会
2015年03月11日, その他 - グラフェンデバイスを用いたバイオセンサーの開発とグラフェン形成
グラフェンコンソーシアム第７回研究講演会
2015年02月04日, 口頭発表（招待・特別）
外部研究資金等
委員歴
- 大阪大学
招へい教授
自 20230401, 至 20240331 - 2023 Microprocesses and Nanotechnology Conference
2023 Microprocesses and Nanotechnology Conference プログラム委員
自 202304, 至 202403 - 大阪大学
招へい教授
自 20220401, 至 20230331 - 2022 Microprocesses and Nanotechnology Conference
2022 Microprocesses and Nanotechnology Conference プログラム委員
自 202204, 至 202303 - 日本学術振興会
科学研究費委員会専門委員
自 202204, 至 202303 - 大阪大学
招へい教授
自 202104, 至 202203 - 日本学術振興会
科学研究費委員会専門委員
自 202104, 至 202203 - 2021 Microprocesses and Nanotechnology Conference
2021 Microprocesses and Nanotechnology Conference プログラム委員
自 202104, 至 202203
メディア報道
- 農工大、溶液中のカドミウムを検出するポータブルグラフェンセンサを開発
東京農工大学は2月6日、半導体微細化技術によって小型化したグラフェンセンサと自作のポータブル検出器を利用して、有害物質として知られる重金属「カドミウム」の化合物を溶液中で検出することに成功したと紹介される。
マイナビニュース
自 2023年02月07日, 至 2023年02月07日 - 東京農工大、電子デバイスを利用した溶液中の生体由来分子検出の新手法を発表
従来電子デバイスを利用した溶液中センサで問題となるデバイ遮蔽の影響を受けない新しい分子検出の実証に成功したと紹介される。
日本経済新聞
自 2022年10月03日, 至 2022年10月03日 - 電子デバイスノイズを利用し、分子の電子状態変化を捉えることに農工大が成功
東京農工大学の桶田知宏大学院生、生田昂助教、前橋兼三教授は、通常電子デバイスにおいて邪魔者となるノイズを積極的に利用することで、従来は検出できなかった、分子の電子状態変化を捉えることに成功したと発表したことが紹介される。
マイナビニュース／infoseekニュース／ニコニコニュース
自 2022年03月14日, 至 2022年03月14日 - NO? 定量検出小型センサー
東京農工大学の生田昴助教、前橋兼三教授らが、炭素材料のグラフェンと金属錯体を使って極微量の二酸化窒素（NO?）を定量検出できる高感度小型ガスセンサーを開発したことが紹介される。
日刊工業新聞
自 2021年08月11日, 至 2021年08月11日