transport properties of ionic-liquid gated graphene

• Project/Area Number: 26400361
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Okayama University
• Principal Investigator: Goto Hidenori 岡山大学, 異分野基礎科学研究所, 助教 (90322669)
• Co-Investigator(Renkei-kenkyūsha): KUBOZONO Yoshihiro 岡山大学, 異分野基礎科学研究所, 教授 (80221935)
• Research Collaborator: UESUGI Eri ; AKIYOSHI Hidehiko ; UCHIYAMA Takaki
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: グラフェン / イオン液体 / 電気二重層 / キャリア蓄積 / 分子吸着 / 自己組織化単分子膜 / 電子移動 / ２次元層状物質 / バンド制御 / 分子エレクトロニクス / 量子キャパシタンス / メゾスコピック系物理 / ナノテクノロジー

Outline of Final Research Achievements

Graphene, a single layer of carbon atoms, exhibits unique electronic properties originating from the linear energy dispersion relation. Due to its large specific surface area, electronic properties of graphene are significantly influenced by molecular adsorbates. We experimentally studied the electron transfer process between graphene and molecules by depositing a variety of molecules on graphene. As a result, it was found that the efficiency of carrier doping is determined by the difference of the Fermi energy of graphene and the HOMO/LUMO level of the molecules. It was also suggested that electron-transfer molecules lead to inhomogeneous potential energy in graphene, which may degrade the carrier mobility. This problem is more significant in the doping method than in the conventional gating method using the electric-field effect.

Research Products

• [Journal Article] Recent progress on carbon-based superconductors (2016)
  • Author(s): Yoshihiro Kubozono, Ritsuko Eguchi, Hidenori Goto, Shino Hamao, Takashi Kambe, Takahiro Terao, Saki Nishiyama, Lu Zheng, Xiao Miao, Hideki Okamoto
  • Journal Title: Journal of Physics: Condensed Matter Volume: 28 Issue: 33 Pages: 334001-334001
  • DOI: 10.1088/0953-8984/28/33/334001
  • Peer Reviewed
• [Journal Article] Emergence of superconductivity in (NH3)yMxMoSe2 (M: +I, Na and K) (2016)
  • Author(s): X. Miao, S. Nishiyama, L. Zheng, H. Goto, R. Eguchi, H. Ota, T. Kambe, K. Terashima, T. Yokoya, H. T. L. Nguyen, T. Kagayama, N. Hirao, Y. Ohishi, H. Ishii, Y.-F. Liao, Y. Kubozono
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 29292-29292
  • DOI: 10.1038/srep29292
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Chemical analysis of superconducting phase in K-doped picene (2016)
  • Author(s): T. Kambe, S. Nisiyama, H. L. T. Nguyen, T. Terao, M. Izumi, Y. Sakai, L. Zheng, H. Gotyo, Y. Ito, T. Onji, T. C. Kobayashi, H. Sugino, S. Gohda, H. Okamoto, Y. Kubozono
  • Journal Title: J. Phys.: Condens. Matter 28, 444001 (2016) Volume: 28 Issue: 44 Pages: 444001-444001
  • DOI: 10.1088/0953-8984/28/44/444001
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Photoelectron holographic atomic arrangement imaging of cleaved bimetal-intercalated graphite superconductor surface (2016)
  • Author(s): F. Matsui, R. Eguchi, S. Nishiyama, M. Izumi, E. Uesugi, H. Goto, T. Matsushita, K. Sugita, H. Daimon, Y. Hamamoto, I. Hamada, Y. Morikawa, Y. Kubozono
  • Journal Title: Scientific Reports 6, 36258 (2016) Volume: 6 Issue: 1 Pages: 36258-36258
  • DOI: 10.1038/srep36258
  • NAID: 120005867254
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Superconductivity in (NH3)yNaxFeSe0.5Te0.5 (2016)
  • Author(s): L. Zheng, Y. Sakai, X. Miao, S. Nishiyama, T. Terao, R. Eguchi, H. Goto, Y. Kubozono
  • Journal Title: Phys. Rev. B 94, 174505 (2016) Volume: 94 Issue: 17 Pages: 174505-174505
  • DOI: 10.1103/physrevb.94.174505
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Electrostatic electron-doping yields superconductivity in LaOBiS2 (2016)
  • Author(s): E. Uesugi, S. Nishiyama, H. Goto, H. Ota, Y. Kubozono
  • Journal Title: Appl. Phys. Lett. Volume: 109 Issue: 25 Pages: 252601-252601
  • DOI: 10.1063/1.4972400
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Synthesis and transistor application of the extremely extended phenacene molecule, [9]phenacene (2016)
  • Author(s): Yuma Shimo, Takahiro Mikami, Shino Hamao, Hidenori Goto, Hideki Okamoto, Ritsuko Eguchi, Shin Gohda, Yasuhiko Hayashi, Yoshihiro Kubozono
  • Journal Title: Sci. Rep. Volume: 6 Issue: 1 Pages: 18931-18931
  • DOI: 10.1038/srep21008
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fabrication of new superconducting materials, CaxK1-xCy (0 < x < 1) (2016)
  • Author(s): Huyen T. L. Nguyen, Saki Nishiyama, Masanari Izumi, Lu Zheng, Xiao Miao,Yusuke Sakai, Hidenori Goto, Naohisa Hirao, Yasuo Ohishi, Tomoko Kagayama, Katsuya Shimizu, and Yoshihiro Kubozono
  • Journal Title: Carbon Volume: 100 Pages: 641-646
  • DOI: 10.1016/j.carbon.2016.01.071
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Correlation of superconductivity with crystal structure in (NH3)yCsxFeSe (2016)
  • Author(s): Lu Zheng, Xiao Miao, Yusuke Sakai, Hidenori Goto, Eri Uesugi, Ritsuko Eguchi, Saki Nishiyama, Kunihisa Sugimoto, Akihiko Fujiwara and Yoshihiro Kubozono
  • Journal Title: Phys. Rev. B Volume: 93 Issue: 10 Pages: 104508-104508
  • DOI: 10.1103/physrevb.93.104508
  • NAID: 120006382537
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Transistors fabricated using the single crystals of [8]phenacene (2015)
  • Author(s): Yuma Shimo, Takahiro Mikami, Hiroto T. Murakami, Shino Hamao, Hidenori Goto, Hideki Okamoto, Shin Gohda, Kaori Sato, Antonio Cassinese, Yasuhiko Hayashi, and Yoshihiro Kubozono
  • Journal Title: J. Mater. Chem. C Volume: 3 Issue: 28 Pages: 7370-7378
  • DOI: 10.1039/c5tc00960j
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 1D and 2D Bi compounds in field-effect transistors (2015)
  • Author(s): Eri Uesugi, Saki Nishiyama, Hidehiko Akiyoshi, Hidenori Goto, Yoji Koike, Kazuyoshi Yamada, and Yoshihiro Kubozono
  • Journal Title: Adv. Electron. Mater. Volume: 1 Issue: 8 Pages: 199-199
  • DOI: 10.1002/aelm.201500085
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Emergence of multiple superconducting phases in (NH3)yMxFeSe (M: Na and Li) (2015)
  • Author(s): L. Zheng, X. Miao, Y. Sakai, M. Izumi, H. Goto, S. Nishiyama, E. Uesugi, Y. Kasahara, Y. Iwasa and Y. Kubozono
  • Journal Title: Sci. Rep. Volume: 5 Issue: 1 Pages: 12774-12774
  • DOI: 10.1038/srep12774
  • Peer Reviewed / Open Access
• [Journal Article] Transistor Application of NewPicene-type Molecules, 2,9-Dialkylated Phenanthro[1,2-b:8,7-b’]dithiophenes (2015)
  • Author(s): Yoshihiro Kubozono, Keita Hyodo, Hiroki Mori, Shino Hamao, Hidenori Goto, and Yasushi Nishihara
  • Journal Title: J. Mater. Chem. Volume: C 3 Issue: 10 Pages: 2413-2421
  • DOI: 10.1039/c4tc02413c
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Superconductivity in aromatic hydrocarbons (2015)
  • Author(s): Yoshihiro Kubozono, Hidenori Goto, Taihei Jabuchi, Takayoshi Yokoya, Takashi Kambe, Yusuke Sakai, Masanari Izumi, Lu Zheng, Shino Hamao, Huyen L.T. Nguyen, Masafumi Sakata, Tomoko Kagayama, Katsuya Shimizu
  • Journal Title: Physica C: Superconductivity and its Applications Volume: in press Pages: 199-2015
  • DOI: 10.1016/j.physc.2015.02.015
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Emergence of Double-Dome Superconductivity in Ammoniated Metal-Doped FeSe (2015)
  • Author(s): Masanari Izumi, Lu Zheng, Yusuke Sakai, Hidenori Goto, Masafumi Sakata, Yuki Nakamoto, Huyen L. T. Nguyen, Tomoko Kagayama, Katsuya Shimizu, Shingo Araki, Tatsuo C. Kobayashi, Takashi Kambe, Dachun Gu, Jing Guo, Jing Liu, Yanchun Li, Liling Sun, Kosmas Prassides, and Yoshihiro Kubozono
  • Journal Title: Scientific Reports Volume: 5 Issue: 1 Pages: 9477-9477
  • DOI: 10.1038/srep09477
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Carrier Accumulation in Graphene with Electron Donor/Acceptor Molecules (2015)
  • Author(s): H. Akiyoshi, H. Goto, E. Uesugi, R. Eguchi, Y. Yoshida, G. Saito, Y. Kubozono
  • Journal Title: Adv. Electron. Mater. Volume: 印刷中 Issue: 7 Pages: 1500073-1500073
  • DOI: 10.1002/aelm.201500073
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 数層グラフェンにおけるパリティ効果 (2014)
  • Author(s): 後藤秀徳, 上杉英里, 久保園芳博
  • Journal Title: New Diamond Volume: 114 Pages: 10-14
• [Presentation] 電界効果によるカルコゲナイド層状物質の電子状態の研究 (2017)
  • Author(s): 上杉 英里, 後藤 秀徳, Miao Xiao, He Tong, 太田 弘道, 上野 哲平, 小林 夏野, 秋光 純, 久保園 芳博
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府・豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 自己組織化単分子膜と吸着分子を用いた2層グラフェンのバンドギャップ制御 (2017)
  • Author(s): 内山貴生, 後藤秀徳, 秋吉秀彦, 上杉英里, 江口律子, 長田洋, 西川尚男, 久保園芳博
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府・豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 自己組織化単分子膜と分子吸着を用いた数層グラフェンの電子状態制御 (2016)
  • Author(s): 後藤秀徳, 内山貴生, 秋吉秀彦, 上杉英里, 江口律子, 齋藤軍治, 吉田幸大, 長田 洋, 西川尚男, 久保園芳博
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学（石川県・金沢市）
  • Year and Date: 2016-09-13
• [Presentation] Electron transfer between graphene and adsorbed molecules (2016)
  • Author(s): Hidenori Goto, Hidehiko Akiyoshi, Takaki Uchiyama, Ritsuko Eguchi and Yoshihiro Kubozono
  • Organizer: EMN 2D Materials Meeting
  • Place of Presentation: San Sebastian, Spain
  • Year and Date: 2016-05-19
  • Int'l Joint Research / Invited
• [Presentation] 分子吸着によるグラフェンの電子状態制御 (2016)
  • Author(s): 秋吉秀彦，後藤秀徳，上杉英里，大山晶子，江口律子，久保園芳博，吉田幸大，齋藤軍治，長田洋，西川尚男
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学(宮城県・仙台市)
  • Year and Date: 2016-03-19
• [Presentation] Electronic properties of graphene with molecular adsorption (2016)
  • Author(s): Hidenori Goto
  • Organizer: The 3rd INRS and Okayama University - International Scientific Workshop
  • Place of Presentation: 岡山大学（岡山県・岡山市）
• [Presentation] 有機分子吸着によるグラフェンのキャリア蓄積 (2015)
  • Author(s): 秋吉秀彦，後藤秀徳，上杉英里，江口律子，吉田幸大，齋藤軍治，久保園芳博
  • Organizer: 2015年日本化学会中国四国支部大会
  • Place of Presentation: 岡山大学(岡山県・岡山市)
  • Year and Date: 2015-11-14
• [Presentation] グラフェン/吸着分子間の電子移動過程 (2015)
  • Author(s): 後藤秀徳
  • Organizer: ナノファンクショナルマテリアルシンポジウム
  • Place of Presentation: 岡山大学(岡山県・岡山市)
  • Year and Date: 2015-05-13