Papers - Noda, Kei

Preparation and Photophysical and Photoelectrochemical Properties of a Covalently Fixed Porphyrin-Chemically Converted Graphene Composite

Umeyama, Tomokazu, Mihara, Junya, Tezuka, Noriyasu, Matano, Yoshihiro, Stranius, Kati, Chukharev, Vladimir, Tkachenko, Nikolai V., Lemmetyinen, Helge, Noda, Kei, Matsushige, Kazumi, Shishido, Tetsuya, Liu, Zheng, Hirose-Takai, Kaori, Suenaga, Kazu, Imahori, Hiroshi

CHEMISTRY-A EUROPEAN JOURNAL 18 ( 14 ) 4250 - 4257 2012.04

Research paper (scientific journal),  ISSN  0947-6539

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Real-time investigation on photocatalytic oxidation of gaseous methanol with nanocrystalline WO3-TiO2 composite films

Sadale, Shivaji B., Noda, Kei, Kobayashi, Kei, Yamada, Hirofumi, Matsushige, Kazumi

THIN SOLID FILMS 520 ( 10 ) 3847 - 3851 2012.03

Research paper (scientific journal),  ISSN  0040-6090

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A Photoconductive, Thiophene-Fullerene Double-Cable Polymer, Nanorod Device

Imahori, Hiroshi, Kitaura, Shinji, Kira, Aiko, Hayashi, Hironobu, Nishi, Masayuki, Hirao, Kazuyuki, Isoda, Seiji, Tsujimoto, Masahiko, Takano, Mikio, Zhe, Zhang, Miyato, Yuji, Noda, Kei, Matsushige, Kazumi, Stranius, Kati, Tkachenko, Nikolai V., Lemmetyinen, Helge, Qin, Lidong, Hurst, Sarah J., Mirkin, Chad A.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS 3 ( 4 ) 478 - 481 2012.02

Research paper (scientific journal),  ISSN  1948-7185

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Thermal Conversion of Precursor Polymer to Low Bandgap Conjugated Polymer Containing Isothianaphthene Dimer Subunits

Umeyama, Tomokazu, Hirose, Kohei, Noda, Kei, Matsushige, Kazumi, Shishido, Tetsuya, Hayashi, Hironobu, Matano, Yoshihiro, Ono, Noboru, Imahori, Hiroshi

JOURNAL OF PHYSICAL CHEMISTRY C 116 ( 1 ) 1256 - 1264 2012.01

Research paper (scientific journal),  ISSN  1932-7447

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Hall-effect Measurement of Organic Semiconductor Layers Using Micro-scale Electrode Chips

Noda Kei, Matsushige Kazumi, Sugawara Akira, Wada Yasuo, Watahiki Tsutomu, Kiyosu Takahiro

IEEJ Transactions on Electronics, Information and Systems 132 ( 9 ) 1398 - 1401 2012

ISSN  0385-4221

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<p>A new micro-electrode structure for Hall-effect measurements of organic semiconductor layers was proposed. The equations for the Hall-effect measurements based on the van der Pauw method indicate that narrower electrode gaps can decrease the resistance between contact points and enable Hall-effect measurement even for higher resistance materials such as organic semiconductors. According to this “scaling rule”, we fabricated a new electrode chip which consists of four small finger electrodes with a gap of micrometer-scale between diagonally opposite electrodes. In order to demonstrate the validity of this concept, Hall-effect measurements for FeCl₃-doped poly(3,4-ethylenedioxythiophene) (PEDOT) was performed using this new electrode structure, revealing that a 10-µm-gap electrode chip is effective for evaluating carrier concentration of down to around 10¹⁹ cm^-3. These Hall electrode chips are quite useful for quantitative analysis of carrier concentration and ca rier mobility in organic semiconductor materials.</p>

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High-purity hydrogen generation by ultraviolet illumination with the membrane composed of titanium dioxide nanotube array and Pd layer

Hattori, Masashi, Noda, Kei, Matsushige, Kazumi

APPLIED PHYSICS LETTERS 99 ( 12 ) 123107-1 - 123107-3 2011.09

Research paper (scientific journal),  ISSN  0003-6951

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Molecular doping effect in bottom-gate, bottom-contact pentacene thin-film transistors

Wakatsuki, Yusuke, Noda, Kei, Wada, Yasuo, Toyabe, Toru, Matsushige, Kazumi

JOURNAL OF APPLIED PHYSICS 110 ( 5 ) 054505-1 - 054505-6 2011.09

Research paper (scientific journal), Joint Work,  ISSN  0021-8979

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Intricate photocatalytic decomposition behavior of gaseous methanol with nanocrystalline tungsten trioxide films in high vacuum

Sadale, Shivaji B., Noda, Kei, Kobayashi, Kei, Matsushige, Kazumi

APPLIED SURFACE SCIENCE 257 ( 23 ) 10300 - 10305 2011.09

Research paper (scientific journal),  ISSN  0169-4332

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Comparison of Electrochemical Impedance Spectroscopy between Illumination and Dark Conditions

Adachi, Motonari, Noda, Kei, Tanino, Ryo, Adachi, Jun, Tsuchiya, Katsumi, Mori, Yasushige, Uchida, Fumio

CHEMISTRY LETTERS 40 ( 8 ) 890 - 892 2011.08

Research paper (scientific journal),  ISSN  0366-7022

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Investigation of electron trapping behavior in n-channel organic thin-film transistors with ultrathin polymer passivation on SiO2 gate insulator

Tanida, Shinji, Noda, Kei, Kawabata, Hiroshi, Matsushige, Kazumi

SYNTHETIC METALS 160 ( 13-14 ) 1574 - 1578 2010.07

Research paper (scientific journal),  ISSN  0379-6779

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Ultrathin polymer gate buffer layer for air-stable, low-voltage, n-channel organic thin-film transistors

Tanida, Shinji, Noda, Kei, Kawabata, Hiroshi, Matsushige, Kazumi

POLYMERS FOR ADVANCED TECHNOLOGIES 21 ( 7 ) 528 - 532 2010.07

Research paper (scientific journal),  ISSN  1042-7147

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Hydrogen production from gas phase photocatalytic decomposition of methanol using Pt-supported nanocrystalline WO3 films

Shivaji B. Sadale, Kei Noda, Kei Kobayashi, Kazumi Matsushige

Physica Status Solidi C 8   552 - 554 2010.05

Research paper (international conference proceedings), Accepted

Gas phase photocatalytic decomposition of alcohols with titanium dioxide nanotube arrays in high vacuum

Masashi Hattori, Kei Noda, Kei Kobayashi, Kazumi Matsushige

Physica Status Solidi C 8   549 - 551 2010.05

Research paper (international conference proceedings), Accepted

N-channel operation of pentacene thin-film transistors with ultrathin polymer gate buffer layer

Noda, Kei, Tanida, Shinji, Kawabata, Hiroshi, Matsushige, Kazumi

SYNTHETIC METALS 160 ( 1-2 ) 83 - 87 2010.01

Research paper (scientific journal),  ISSN  0379-6779

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Organosilane self-assembled multilayer formation based on activation of methyl-terminated surface with reactive oxygen species generated by vacuum ultra-violet excitation of atmospheric oxygen molecules

Kim, Young-Jong, Han, Jiwon, Sano, Hikaru, Lee, Kyung-Hwang, Noda, Kei, Ichii, Takashi, Murase, Kuniaki, Matsushige, Kazumi, Sugimura, Hiroyuki

APPLIED SURFACE SCIENCE 256 ( 5 ) 1507 - 1513 2009.12

Research paper (scientific journal),  ISSN  0169-4332

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N-channel thin-film transistors based on 1,4,5,8-naphthalene tetracarboxylic dianhydride with ultrathin polymer gate buffer layer

Tanida, Shinji, Noda, Kei, Kawabata, Hiroshi, Matsushige, Kazumi

THIN SOLID FILMS 518 ( 2 ) 571 - 574 2009.11

Research paper (scientific journal),  ISSN  0040-6090

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Alkyl and Alkoxyl Monolayers Directly Attached to Silicon: Chemical Durability in Aqueous Solutions

Sano, Hikaru, Maeda, Hajime, Ichii, Takashi, Murase, Kuniaki, Noda, Kei, Matsushige, Kazumi, Sugimura, Hiroyuki

LANGMUIR 25 ( 10 ) 5516 - 5525 2009.05

Research paper (scientific journal),  ISSN  0743-7463

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Photocatalytic hydrogen production from gas-phase methanol and water with nanocrystalline TiO₂ thin films in high vacuum

Noda Kei, Hattori Masashi, Amari Kouichi, Kobayashi Kei, Horiuchi Toshihisa, Matsushige Kazumi

Materials Research Society Symposium Proceedings 1056   7 - 12 2008

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<p>Photocatalytic hydrogen production with gas-phase reactions in high vacuum was examined for nanocrystalline anatase-type titanium dioxide (TiO₂) thin films. The hydrogen generation process on platinized TiC₂ specimens was investigated using a quadrupole mass spectrometer at a real-time scale under various partial pressures of gaseous methanol and water. As a result, hydrogen generation was successfully detected under ultraviolet (UV) ray illumination even in high vacuum (-10^-7 Torr). And the amount of produced H₂ largely depends on the temperature of TiO₂ samples, probably due to different surface states of TiO₂. This study suggests the possibility of new high-speed H₂ production system with gas-phase photocatalytic reactions.</p>

Flexible programmable logic gate using organic ferroelectric multilayer

Horie, Satoshi, Noda, Kei, Yamada, Hirofumi, Matsushige, Kazumi, Ishida, Kenji, Kuwajima, Shuichiro

APPLIED PHYSICS LETTERS 91 ( 19 ) 193506-1 - 193506-3 2007.11

Research paper (scientific journal),  ISSN  0003-6951

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Real-time detection of photocatalytic hydrogen production for platinized titanium dioxide thin films in high vacuum

Noda, Kei, Hattori, Masashi, Amari, Kouichi, Kobayashi, Kei, Horiuchi, Toshihisa, Matsushige, Kazurni

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS &amp; EXPRESS LETTERS 46 ( 29-32 ) L749 - L751 2007.08

Research paper (scientific journal),  ISSN  0021-4922

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