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Research Professor　Staff

Daisuke KUMAKI

TEL: 0238-26-3290
E-mail: d_kumaki<at>yz.yamagata-u.ac.jp
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Results

[48] "Cysteine Detection in Water using an Organic Field Effect Transistor (OFET) with a Gold Extended-Gate Electrode"
Tsuyoshi Minami, Tsukuru Minamiki, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito
Jpn. J. Appl. Phys. Accepted.
[47]"An Extended-Gate Organic Field-Effect Transistor for the Detection of Histamine in Water"
Tsukuru Minamiki, Tsuyoshi Minami, Daisuke Yokoyama, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito
Jpn. J. Appl. Phys. Accepted.
[46] "A Label-Free Immunosensor for IgG Based on an Extended-Gate Type Organic Field Effect Transistor"
Tsukuru Minamiki, Tsuyoshi Minami, Ryoji Kurita, Osamu Niwa, Shin-ichi Wakida, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito.
Materials 7, 6843. (2014) (Invited Paper),
[45] "High-Speed operation in printed organic inverter circuits with short channel length"
Yudai Yoshimura, Yasunori Takeda, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito
Organic Electronics, 15 2696?2701 (2014).
[44] "Fully-printed high-performance organic thin-film transistors and circuitry on one-micron-thick polymer films"
Kenjiro Fukuda, Yasunori Takeda, Yudai Yoshimura, Rei Shiwaku, Lam Truc Tran, Tomohito Sekine, Makoto Mizukami, Daisuke Kumaki, and Shizuo Tokito
Nature Communications, 5, 4147 (2014).
[43] "Accurate and reproducible detection of proteins in water using an extended-gate type organic transistor biosensor"
Tsukuru Minamiki, Tsuyoshi Minami, Ryoji Kurita, Osamu Niwa, Shinichi Wakida, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito
Applied Physics Letters, 104, 243703 (2014).
[42] "Synthesis and Thin-Film Transistor Characterization of Narrow-Gap N-type Semiconducting Polymers based on Benzobis (thiadiazole)",
Taisuke Uemura, Masashi Mamada, Ryo Teraoka, Daisuke Kumaki, and Shizuo Tokito,
Chemistry Letters, Vol.43, No.4, pp.402-404 (2014)
[41] " Improvement of mechanical durability on organic TFT with printed electrodes prepared from nanoparticle ink",
Tomohito Sekine, Hideaki Ikeda, Akifumi Kozakai, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito,
Applied Surface Science, Vol.294, pp.20 (2014)
[40] " Fine Patterning Method for Silver Nanoparticle Electrode Using Difference of Hydrophobic and Hydrophilic Surface Properties",
Ryo Sugano, Yasunori Takeda, Yu Kobayashi, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito,
Japanese Journal of Applied Physics, Vol.53, 04EK01 (2014)
[39]“Fully Solution-Processed Flexible Organic Thin Film Transistor Arrays with High Mobility and Exceptional Uniformity",
Kenjiro Fukuda, Yasunori Takeda, Makoto Mizukami, Daisuke Kumaki, and Shizuo Tokito,
Scientific Reports, Vol.4, pp.3947 (2014)
[38]" Synthesis and Thin-Film Transistor Characterization of Narrow-Gap N-type Semiconducting Polymers based on Benzobis(thiadiazole)",
Taisuke Uemura, Masashi Mamada, Ryo Teraoka, Daisuke Kumaki, Shizuo Tokito,
Chemistry Letters, accepted (2014)
[37]"Integrated circuits using fully solution-processed organic TFT devices with printed silver electrodes"
Yasunori Takeda, Yudai Yoshimura, Yu Kobayashi, Daisuke Kumaki, Kenjiro Fukuda, Shizuo Tokito,
Organic Electronics, Vol.14, pp.3362 (2013)
[36]"Synthesis of Semiconducting Polymers through Soluble Precursor Polymers with Thermally Removable Groups and Their Application to Organic Transistors",
Taisuke Uemura, Masashi Mamada, Daisuke Kumaki, Shizuo Tokito,
ACS Macro Letters, 2013, 2, pp830-833 (2013)
[35]"Strain sensitivity and durability in p-type and n-type organic thin-film transistors with printed silver electrodes",
Kenjiro Fukuda, Kenta Hikichi, Tomohito Sekine, Yasunori Takeda, Tsukuru Minamiki, Daisuke Kumaki, and Shizuo Tokito,
Scientific Reports, 3, 2048 (2013)
[34]"Patterning Method for Silver Nanoparticle Electrodes in Fully Solution-Processed Organic Thin-Film Transistors Using Selectively Treated Hydrophilic and Hydrophobic Surfaces",
Kenjiro Fukuda, Yasunori Takeda, Yu Kobayashi, Masahiro Shimizu, Tomohito Sekine, Daisuke Kumaki, Masato Kurihara, Masatomi Sakamoto, and Shizuo Tokito,
Japanese Journal of Applied Physics, 52, 05DB05 (2013)
[33] "Suppression of threshold voltage shifts in organic thin-film transistors with bilayer gate dielectrics",
Kenjiro Fukuda,Tatsuya Suzuki, Takuma Kobayashi, Daisuke Kumaki, Shizuo Tokito,
Physica Status Solidi A,210, 839-844 (2013)
[32]"Profile Control of Inkjet Printed Silver Electrodes and Their Application to Organic Transistors",
Kenjiro Fukuda, Tomohito Sekine, Daisuke Kumaki, Shizuo Tokito,
Applied Materials & Interfaces, Vol.5, pp.3916 (2013)
[31]"Reduced contact resistance and highly stable operation in polymer thin-film transistor with aqueous MoOx solution contact treatment",
Daisuke Kumaki, Yoshihide Fujisaki and Shizuo Tokito,
Organic Electronics, Vol.14, pp.475 (2013)
[30] "Organic integrated circuits using room-temperature sintered silver nanoparticles as printed electrodes",
Kenjiro Fukuda, Tomohito Sekine, Yu Kobayashi, Yasunori Takeda, Masahiro Shimizu, Naoya Yamashita, Daisuke Kumaki, Mitsunori Itoh, Minami Nagaoka, Takami Toda, Sayaka Saito, Masato Kurihara, Masatomi Sakamoto, Shizuo Tokito,
Organic Electronics, Vol.13, pp.3296 (2012)
[29]"Reverse DC bias stress shifts in organic thin-film transistors with gate dielectrics using parylene-C",
Kenjiro Fukuda, Tatsuya Suzuki, Daisuke Kumaki, and Shizuo Tokito,
Physica Status Solidi A, 209, 2073-2077 (2012)
[28]"Stable organic thin-film transistors using full solution-processing and low-temperature sintering silver nanoparticle inks",
Kenjiro Fukuda, Tomohito Sekine, Yu Kobayashi, Daisuke Kumaki, Mitsunori Itoh, Minami Nagaoka, Takami Toda, Sayaka Saito, Masato Kurihara, Masatomi Sakamoto and Shizuo Tokito,
Organic Electronics, Vol.13, pp.1660 (2012)
[27]“Correlation between interdomain carrier hopping and apparent mobility in polycrystalline organic transistors as investigated by electron spin resonance",
Hiroyuki Matsui, Daisuke Kumaki, Eiji Takahashi, Kazuo Takimiya, Shizuo Tokito, and Tatsuo Hasegawa,
PHYSICAL REVIEW B, Vol.85, pp.035308, (2012)
[26]“Organic field-effect transistors based on novel organic semiconductors containing diazaboroles”,
Takahiro Kojima, Daisuke Kumaki, Junich Nishida, Shizuo Tokito, Yoshiro Yamashita,
Journal of Materials Chemistry, Vol.21, pp.6607-66613, (2011)
[25]“Synthesis and FET characteristics of phenylene-vinylene and anthracene-vinylene compounds containing cyano groups”,
Kohei Shoji, Jun-ichi Nishidaida, Daisuke Kumaki, Shizuo Tokito, Yoshiro Yamashita,
Journal of Materials Chemistry, Vol.20, pp.6472-6478, (2010)
[24]“Air-stable n-type organic thin-film transistor array and high gain complementary inverter on flexible substrate”,
Yoshihide Fujisaki, Yoshiki Nakajima, Daisuke Kumaki, Toshihiro Yamamoto, Shizuo Tokito, Takahiro Kono, Jun-ichi Nishida, and Yoshiro Yamashita,
Applied Physics Letters, Vol.97, pp.113303-1-3, (2010)
[23]“Dithienobenzobis (thiadiazole) Based Organic Semiconductors with Low LUMO Levels and Narrow Energy Gaps”,
Takahiro Kouno, Daisuke Kumaki, Junich Nishida, Shizuo Tokito, Yoshiro Yamashita,
Chemical Communications, Vol.46, pp.3265, (2010)
[22]“Novel Semiconducting Quinone for Air-Stable n-Type Organic Field-Effect Transistors”,
Masashi Mamada, Daisuke Kumaki, Junich Nishida, Shizuo Tokito, Yoshiro Yamashita,
Applied Materials and Interfaces, Vol.2, pp.1303, (2010)
[21] “Low-Voltage and Hysteresis-Free N-Type Organic Thin Film Transistor and Complementary Inverter with Bilayer Gate Insulator”,
Yoshihide Fujisaki, Masashi Mamada, Daisuke Kumaki, Shizuo Tokito, Yoshiro Yamashita,
Japanese Journal of Applied Physics, Vol.48, pp.111504, (2009)
[20]“Surface-energy-dependent field-effect mobilities up to 1 cm2/Vs for polymer thin-film transistor”,
Tokiyoshi Umeda, Daisuke Kumaki, Shizuo Tokito,
Journal of Applied Physics, Vol.105, pp.024516-1-5, (2009)
[19]“Influence of H2O and O2 on threshold voltage shift in organic thin-film transistors: Deprotonation of SiOH on SiO2 gate-insulator surface”,
Daisuke Kumaki, Tokiyoshi Umeda, Shizuo Tokito,
Applied Physics Letters, Vol.92, pp.093309-1-3, (2008)
[18]“Reducing the contact resistance of bottom-contact pentacene thin-film transistors by employing a MoOx carrier injection layer”,
Daisuke Kumaki, Tokiyoshi Umeda, Shizuo Tokito,
Applied Physics Letters, Vol.92, pp.013301-1-3, (2008)
[17]“High-mobility bottom-contact thin-film transistor based on anthracene oligomer”,
Daisuke Kumaki, Tokiyoshi Umeda, Toshiyasu Suzuki, Shizuo Tokito,
Organic Electronics, Vol.9, pp.921-924, (2008)
[16]“High Performance Organic Field-Effect Transistors Based on [2,2']Bi[naphtho[2,3-b]thiophenyl] with a Simple Structure”,
Masashi Mamada, Junich Nishida, Daisuke Kumaki, Shizuo Tokito, Yoshiro Yamashita,
Journal of Materials Chemistry, Vol.18, pp.3442-3447, (2008)
[15]“Synthesis, Structure, and Transport Property of Perfluorinated Oligofluorenes”,
Kimitaka Ohkubo, Youichi Sakamoto, Toshiyasu Suzuki, Toshimitsu Tsuzuki, Daisuke Kumaki, Shizuo Tokito,
Chemistry - A European Journal, Vol.14, pp.4472-4474, (2008)
[14]“High air stability of threshold voltage on gate bias stress in pentacene TFTs with a hydroxyl-free and amorphous fluoropolymer as gate insulators”,
Tokiyoshi Umeda, Daisuke Kumaki, Shizuo Tokito,
Organic Electronics, Vol.9, pp.545-549, (2008)
[13]“High Performance n-Type Field-Effect Transistors Based on Indenofluorenedione and Diindenopyrazinedione Derivatives”,
Tomohiro Nakagawa, Daisuke Kumaki, Jun-ichi Nishida, Shizuo Tokito, Yoshiro Yamashita,
Chemistry of Materials, Vol.20, pp.2615-2617, (2008)
[12] “Air stable, high performance pentacene thin-film transistor fabricated on SiO2 gate insulator treated with ?-phenethyltrichlorosilane”,
Daisuke Kumaki, MasayukiYahiro, Youji Inoue, Shizuo Tokito,
Applied Physics Letters, Vol.90, pp.133511-1-3, (2007)
[11]“Significant improvement of electron mobility in organic thin-film transistors based on thiazolothiazole derivative by employing self-assembled monolayer”,
Daisuke Kumaki, Shinji Ando, Satoshi Shimono, Yoshiro Yamashita, Tokiyoshi Umeda, Shizuo Tokito,
Applied Physics Letters, Vol.90, pp.053506-1-3, (2007)
[10]“n-type organic field-effect transistors with high electron mobilities based on thiazole-thiazolothiazole conjugated molecules”,
Masashi Mamada, Junich Nishida, Daisuke Kumaki, Shizuo Tokito, Yoshiro Yamashita,
Chemistry of Materials, Vol.19, pp.5404-5406, (2007)
[ 9]“High-mobility and air-stable organic thin-film transistors with highly　ordered semiconducting polymer films”,
Tokiyoshi Umeda, Daisuke Kumaki, Shizuo Tokito,
Journal of Applied Physics, Vol.101, pp.054517-1-5, (2007)
[ 8]“High-performance and light-emitting n-type organic field-effect transistors based on dithienylbenzothiadiazole and related heterocycles”,
Takahiro Kouno, Daisuke Kumaki, Junich Nishida, Satoshi Sakanoue, Motoyasu Kakida, Hirokazu Tada, Shizuo Tokito, Yoshiro Yamashita,
Chemistry of Materials, Vol.19, pp.1218-1220, (2007)
[ 7] “Small molecule-based organic electrophosphorescent devices fabricated by spin coating”,
Kenichiro Watanabe, Daisuke Kumaki, Toshimitsu Tsuzuki, Eiji Tokunaga, Shizuo Tokito,
Journal of Photopolymer Science and Technology, Vol.20, pp.39-42, (2007)
[ 6]“Synthesis, physical properties and field-effect transistors of novel thiazolothiazole?phenylene co-oligomers”,
Shinji Ando, Daisuke Kumaki, Junich Nishida, Hirokazu Tada, Youji Inoue, Shizuo Tokito, Yoshiro Yamashita,
Journal of Materials Chemistry, Vol.17, pp.553-558, (2007)
[ 5]“Improvement of mobility and stability in pentacene-TFT by chemical surface treatment”,
Daisuke Kumaki, MasayukiYahiro, Youji Inoue, Shizuo Tokito,
Journal of Photopolymer Science and Technology, Vol.19, pp.41-44, (2006)
[ 4]“High performance n- and p-type field-effect transistors based on tetrathiafulvalene derivatives”,
Naraso, Junich Nishida, Daisuke Kumaki, Shizuo Tokito, Yoshiro Yamashita,
Journal of the American Chemical Society, Vol.128, pp.9598-9599, (2006)
[ 3]“Excimer Laser Ablation of Polyacrylamide Gel”,
Katsunori Tsunoda, Daisuke Kumaki, Shinsaku Yoshida, Hirofumi Yajima, Tadahiro Ishii,
Journal of Photopolymer Science and Technology, Vol.13, pp.175-176, (2006)
[ 2]“Organic thin-film diodes with internal charge separation zone”,
Masaya Terai, Daisuke Kumaki, Takeshi Yasuda, Katsuhiko Fujita, Tetsuo Tsutsui,
Current Applied Physics, Vol.5, pp.341-344, (2005)
[ 1]“Characterization of materials ejected by excimer laser ablation of hydrated collagen gel”,
Katsunori Tsunoda, Daisuke Kumaki, Teruo Takahashi, Hirofumi Yajima, Tadahiro Ishii, Hiroshi Itoh,
Applied Surface Science, Vol.197-197, pp.782-785, (2002)
[2]“6 inch-flexible AM-OLED moving image display”,
Shizuo Tokito, Daisuke Kumaki, Yoshiki Nakajima, Tatsuya Takei, Tsuzuki, T. Mitsunori Suzuki, Hirohiko Fukagawa, Toshihiro Yamamoto, Taishiro Kurita,
Flexible Electronics & Displays Conference ECS Trans, pp.23-31 (2009)
[1]“High performance n-type FETs based on heterocyclic ring systems with trifluoromethylphenyl groups”,
Yoshiro Yamashita, Satoshi Shimono, Takahiro Kono, Daisuke Kumaki, Jun-ichi Nishida, Shizuo Tokito,
Proc. SPIE 6658, 66580N (2007)

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