名前：坂本謙二（主任研究員）

趣味：ゴルフ、スキー、ジム通い

略歴
1982年3月　千葉県立佐倉高等学校卒業
1986年3月　東北大学通信工学科卒業
1988年3月　東北大学大学院工学研究科電子工学専攻（工学修士）
1991年3月　東北大学大学院工学研究科電子工学専攻（工学博士）
1990年4月〜1991年5月　日本学術振興会特別研究員
1991年6月〜2003年12月　東北大学電気通信研究所・助手
2001年2月〜　理化学研究所フォトダイナミクスリサーチセンター・非常勤研究員（兼任）
2004年1月〜　現職

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業績リスト

査読付き原著論文:
1) K. Sakamoto, G. Mizutani, Y. Kondo, and S. Ushioda, “Growth of a Polycrystalline Nitrobenzene Film on Ni(111) Surface Studied by Raman Scattering”, Surf. Sci. 221, No.1-2, 61-68 (1989).
2) Y. Kondo, G. Mizutani, K. Sakamoto, and S. Ushioda, “Raman Scattering Study of Surface Band-bending at the NEA Cs/p-GaAs(110) Surface”, Mater. Sci. Eng. B 7, No.3, 177-181 (1990).
3) M. Kuwahara, G. Mizutani, K. Sakamoto, and S. Ushioda, “Absolute Raman Scattering Cross-section of Surface Adsorbed Cu-phthalocyanine Molecules”, Surf. Sci. 242, No.1-3, 544-548 (1991).
4) K. Sakamoto, G. Mizutani, and S. Ushioda, “Crystallization of Nitrobenzene Multilayers on Ni(111) Studied by Raman Scattering”, Surf. Sci. 259, no.1-2, 79-84 (1991).
5) K. Sakamoto, G. Mizutani, and S. Ushioda, “Absolute Raman Scattering Cross-section of Surface Adsorbed Layer: Amorphous Nitrobenzene Layer on Ni(111)”, Phys. Rev. B 48, No.12, 8993-9005 (1993).
6) J. Murota, T. Maeda, K. Goto, K. Sakamoto, K. Aizawa, S. Ushioda, and S. Ono, “Si/Si1-xGex/Si Heterostructure Growth by Ultraclean Low-temperature LPCVD for the Fabrication of Novel Heterodevice”, J. Phys. IV, Colloq. (France) 3, No. C3, 403-410 (1993).
7) K. Sakamoto, R. Arafune, N. Ito, S. Ushioda, Y. Suzuki, and S. Morokawa, “Molecular Orientation of Rubbed and Unrubbed Polyimide Films Determined by Polarized Infrared Absorption”, Jpn. J. Appl. Phys. 33, No. 9B, L1323-1326 (1994).
8) K. Sakamoto, R. Arafune, N. Ito, S. Ushioda, Y. Suzuki, and S. Morokawa, “Determination of Molecular Orientation of Very Thin Rubbed and Unrubbed Polyimide Films”, J. Appl. Phys. 80, No. 1, 431-439 (1996).
9) T. Yamauchi, Y. Sonoda, K. Sakamoto, S. Ushioda, H. Sano, J. Sakai, and G. Mizutani, “Surface SHG and Photoemission from Cs, O2/p-GaAs Coadsorbed System”, Surf. Sci. 363, 385-390 (1996).
10) K. Sakamoto, R. Arafune, S. Ushioda, Y. Suzuki, and S. Morokawa, “Molecular Orientation of Polyimide Films Determined by an Optical Retardation Method”, Appl. Surf. Sci. 100/101, 124-128 (1996).
11) K. Sakamoto, H. Hashizume, M. Nagafusa, H. Sato, and S. Ushioda, “UV Resonant Raman Spectra of Nitrobenzene Adsorbed on Ni(111)”, Surf. Sci. 368, 292-295 (1996).
12) R. Arafune, K. Sakamoto, D. Yamakawa, and S. Ushioda, “Pretilt Angles of Liquid Crystals in Contact with Rubbed Polyimide Films with Different Chain Inclinations”, Surf. Sci. 368, 208-212 (1996).
13) K. Sakamoto, R. Arafune, and S. Ushioda, “Incident Angle Dependence of the Infrared Absorbance of Thin Polyimide Films on CaF2 and Si Substrates”, Appl. Spectrosc. 51, No. 4, 541-544 (1997).
14) R. Arafune, K. Sakamoto, and S. Ushioda, “Correlation between the Pretilt Angle of Liquid Crystal and the Inclination Angle of the Polyimide Backbone Structure”, Appl. Phys. Lett. 71, No. 19, 2755-2757 (1997).
15) K. Sakamoto, N. Abe, R. Arafune, and S. Ushioda, “Orientation of the Backbone Structure of Polyimide with Alkyl Side-Chains: Determination by Infrared Absorption Spectroscopy”, Mol. Cryst. Liq. Cryst. 299, 169-174 (1997).
16) K. Sakamoto, K. Usami, W. Watanabe, R. Arafune, and S. Ushioda, “Surface Anisotropy of Polyimide Film Irradiated with Linearly Polarized Ultraviolet Light”, Appl. Phys. Lett. 72, No. 15, 1832-1834 (1998).
17) S. Kambe, I. Shime, S. Ohshima, K. Okuyama, and K. Sakamoto, “Crystal Structure and Electronic Properties of BaBiOy (2.5 ? y ? 2.9) and Ba1-xLaxBiO3 (0 ? x ? 0.5) “ Solid State Ionics 108, No. 1-4, 307-313 (1998).
18) R. Arafune, K. Sakamoto, S. Ushioda, S. Tanioka, and S. Murata, “Importance of Rubbing-induced Inclination of Polyimide Backbone Structures for Determination of the Pretilt Angle of Liquid Crystals”, Phys. Rev. E 58, No. 5, 5914-5918 (1998).
19) K. Sakamoto, N. Ito, R. Arafune, and S. Ushioda, “Determination of the Molecular Orientation of Very Thin Films on Solid Substrates: Surface Liquid Crystal Layers and Rubbed Polyimide Films”, Vib. Spectrosc. 19, No. 1, 51-59 (1999).
20) K. Kumagai, K. Sakamoto, K. Usami, R. Arafune, Y. Nakabayashi, and S. Ushioda, “Molecular Orientation of Liquid Crystal Monolayers on Polyimide Films Exposed to Linearly Polarized UV Light”, Jpn. J. Appl. Phys. 38, No. 6A, 3615-3618 (1999).
21) K. Sakamoto, K. Usami, R. Arafune, and S. Ushioda, “Dichroism of a Polyimide Chain for Ultraviolet Light”, Mol. Cryst. Liq. Cryst. 329, 393-400 (1999).
22) R. Arafune, K. Sakamoto, and S. Ushioda, “A Model of Inclined Orientation of Polyimide Backbone Structures in Rubbed Films”, Mol. Cryst. Liq. Cryst. 329, 153-160 (1999).
23) K. Sakamoto, K. Usami, T. Araya, and S. Ushioda, “Anisotropic Molecular Orientation of Poly [4, 4’-oxydiphenylene-1,2,3,4-cyclobutanetetracarboxyimide] Films Irradiated with Linearly Polarized UV Light”, Jpn. J. Appl. Phys. 38, No. 12A, L1435-1438 (1999).
24) N. Ito, K. Sakamoto, R. Arafune, and S. Ushioda, “Relation between the Molecular Orientations of a Very Thin Liquid Crystal Layer and an Underlying Rubbed Polyimide Film”, J. Appl. Phys. 88, No. 6, 3235-3241 (2000).
25) K. Usami, K. Sakamoto, and S. Ushioda, “Anisotropic Decomposition of Polyimide Molecules Induced by Irradiation of Linearly Polarized UV Light”, Mol. Cryst. Liq. Cryst. 347, 25-35 (2000).
26) K. Usami, K. Sakamoto, and S. Ushioda, “Influence of Molecular Structure on Anisotropic Photoinduced Decomposition of Polyimide Molecules”, J. Appl. Phys.89, No. 10, 5339-5342 (2001).
27) R. Arafune, K. Sakamoto, K. Meguro, M. Satoh, A. Arai, and S. Ushioda, “Multiple-fiber Collection System for Scanning Tunneling Microscope Light Emission Spectroscopy”, Jpn. J. Appl. Phys. 40, No. 9A, 5450-5453 (2001).
28) K. Usami, K. Sakamoto, and S. Ushioda, “Cyclobutane Ring Cleavage of CBDA-ODA Polyimide Molecules Induced by Linearly Polarized UV Light”, Mol. Cryst. Liq. Cryst. 368, 453-460 (2001).
29) R. Arafune, K. Sakamoto, and S. Ushioda, “Effect of a Cleaning Treatment on the Orientational Distribution of Polyimide Backbone Structures in Rubbed Films and on the Pretilt Angle of Liquid Crystals”, Mol. Cryst. Liq. Cryst. 368, 633-641 (2001).
30) K. Meguro, K. Sakamoto, R. Arafune, M. Satoh, and S. Ushioda, “Origin of Multiple Peaks in the Light Emission Spectra of Au(111) Surface Induced by the Scanning Tunneling Microscope”, Phys. Rev. B 65, No. 16, 165405-1-165405-8 (2002).
31) K. Sakamoto, K. Meguro, R. Arafune, M. Satoh, Y. Uehara, and S. Ushioda, “Light Emission Spectra of the Monolayer-island of C60 Molecules on Au(111) Induced by Scanning Tunneling Microscope”, Surf. Sci. 502-503, 149-155 (2002).
32) K. Sakamoto, K. Usami, M. Kikegawa, and S. Ushioda, “Alignment of Polyamic Acid Molecules Containing Azobenzene in the Backbone Structure: Effects of Polarized UV Light Irradiation and Subsequent Thermal Imidization”, J. Appl. Phys. 93, No. 2, 1039-1043 (2003).
33) K. Usami, K. Sakamoto, and S. Ushioda, “Relation between Molecular Orientation of Liquid Crystal Monolayer and the Underlying Polyimide Film Exposed to Linearly Polarized Ultraviolet Light”, J. Appl. Phys. 93, No. 12, 9523-9528 (2003).
34) K. Sakamoto, K. Usami, T. Kanayama, M. Kikegawa, and S. Ushioda, "Photoinduced Inclination of Polyimide Molecules Containing Azobenzene in the Backbone Structure", J. Appl. Phys. 94, No. 4, 2302-2307 (2003).
35) K. Usami, K. Sakamoto, and S. Ushioda, “Change of In-plane Anisotropy of UV Irradiated Polyimide Films Caused by Washing Treatment”, Mol. Cryst. Liq. Cryst. 400, 71-78 (2003).
36) K. Usami, K. Sakamoto, and S. Ushioda, “Anisotropic Molecular Orientation of Liquid Crystal Monolayer in Contact with UV-irradiated Polyimide Film”, Mol. Cryst. Liq. Cryst. 412, 219-227 (2004).
37) K. Sakamoto, K. Usami, M. Kikegawa, and S. Ushioda, “In-plane Molecular Order of a Photo-oriented Polyamic Acid Film: Enhancement upon Thermal Imidization”, Mol. Cryst. Liq. Cryst. 412, 293-299 (2004).
38) K. Sakamoto, K. Usami, T. Sasaki, T. Kanayama, and S. Ushioda, "Optical alignment control of polyimide molecules containing azobenzene in the backbone structure", Thin Solid Films 464-465, 416-419 (2004).
39) K. Sakamoto, K. Usami, T. Sasaki, and S. Ushioda, "Pretilt angle of liquid crystals induced by photo-aligned films of polyimide containing azobenzene in the backbone structure", IEICE Trans. Electron. E87-C, No. 11, 1936-1942 (2004).
40) K. Sakamoto, K. Usami, T. Sasaki, Y. Uehara, and S. Ushioda, "Inclined alignment of polyimide backbone structures induced by single exposure of un-polarized light", submitted to Mol. Cryst. Liq. Cryst.
41) K. Usami, K. Sakamoto, Y. Uehara, and S. Ushioda, "Stability of photo-induced alignment of polyimide backbone structure containing azobenzene", submitted to Mol. Cryst. Liq. Cryst.
42) K. Usami, K. Sakamoto, Y. Uehara, and S. Ushioda, "Relation between molecular orientations of liquid crystal monolayer and underlying polyimide film”, submitted to Appl. Phys. Lett.

国際会議プロシーディングス
1) K. Sakamoto, G. Mizutani, M. Kuwahara, and S. Ushioda, “Absolute Raman Scattering Cross-section of Surface Adsorbed Molecules”, Proceedings of 12th International Conference on Raman Spectroscopy, ed. J. R. Durig and J. F. Sullivan (John Wiley & Sons, Chichester, 1990) pp. 336-337.
2) K. Sakamoto, G. Mizutani, and S. Ushioda, “Absolute Raman Scattering Cross-section of Amorphous Nitrobenzene Layer on Ni(111)”, Proceedings of 13th International Conference on Raman Spectroscopy, ed. W. Kiefer, M. Cardona, G. Schaack, F. W. Schneider, and H. W. Schrotter (John Wiley & Sons, Chichester, 1992) pp. 674-675.
3) S. Suto, K. Sakamoto, and E. Burstein, “Raman Scattering by Phenazine Molecules at Noble Metal Electrodes in Acidic Solution”, Proceedings of 13th International Conference on Raman Spectroscopy, ed. W. Kiefer, M. Cardona, G. Schaack, F. W. Schneider, and H. W. Schrotter (John Wiley & Sons, Chichester, 1992) pp. 688-689.
4) K. Sakamoto, J. Murota, T. Maeda, K. Goto, S. Ushioda, and S. Ono, “Diffusion of Ge atoms in Si/Si1-xGex/Si(100) Hetero-structures observed by Raman scattering”, Proceedings of International Conference on Advanced Microelectronic Device and Processing (March 3-5, 1994, Sendai, Japan) pp. 449-452.
5) T. Maeda, J. Murota, K. Sakamoto, K. Aizawa, S. Ushioda, and S. Ono, “Growth of Si/Si1-xGex/Si Heterostructure by Ultraclean Low-temperature LPCVD”, Proceedings of 12th International Symposium on Chemical Vapor Deposition, ed. K. F. Jensen and G. W. Cullen (The Electrochemical Society, Pennington, NJ, 1992) PV. 93-2, pp. 127-133.
6) K. Sakamoto, S. Ushioda, J. Murota, T. Maeda, K. Goto, and S. Ono, “Interdiffusion in Si0.3Ge0.7/Si(100) Single Quantum Wells Studied by Raman Scattering”, Proceedings of 14th International Conference on Raman Spectroscopy, ed. N. -T. Yu and X. -Y. Li (John Wiley & Sons, Chichester, 1994) pp. 366-367.
7) K. Sakamoto, K. Usami, T. Sasaki, T. Kanayama, and S. Ushioda, "Pretilt Angle Control of Liquid Crystals by Photo-Aligned Films of Polyimide Containing Azobenzene in the Backbone Structure", Proceedings of the 10th International Display Workshops (Dec. 3-5, 2003, Fukuoka International Congress Center, Fukuoka, Japan) pp. 93-96.

解説・著書
1) 坂本謙二，潮田資勝，”ラマン分光”，表面科学 13, no.2, 79-87(1992).
2) 潮田資勝，坂本謙二，”ラマン散乱分光法”，固体表面の物理　表面新物質相（学会出版センター, 1992）, pp. 260-265.
3) 潮田資勝，坂本謙二，”有機吸着層相転移”，固体表面の物理　表面新物質相（学会出版センター, 1992）, pp. 412-416.
4) 坂本謙二，潮田資勝，”124. 表面増強ラマン散乱法:SERS”，表面分析図鑑　（共立出版, 1994）, pp. 50-51.
5) 坂本謙二，潮田資勝，”６章　表面増強ラマン散乱”，表面の電子励起（丸善, 1996）pp. 133-168.
6) 荒船竜一，坂本謙二，潮田資勝，”偏光赤外分光法によるラビングされたポリイミド膜の配向解析”，Molecular Electronics and Bioelectronics（応用物理学会，有機分子・バイオエレクトロニクス分科会、会誌） 9, no.4, 186-191(1998).
7) 潮田資勝，上原洋一，坂本謙二，鶴岡　徹，”走査型トンネル顕微鏡の発光分光による表面ナノ物性計測”，まてりあ 41, no. 12 848-849 (2002).
特許：名称，出願番号，出願人，発明者
１） 「走査型トンネル顕微鏡発光集光装置」，特願平１１−２８９７６３，科学技術振興機構，荒船竜一、坂本謙二、潮田資勝
２） 「液晶配向膜、液晶配向剤、及び液晶表示素子」，特願２００４−５３２２０，チッソ株式会社、理化学研究所，坂本謙二、宇佐美清章、潮田資勝
受賞
1994年3月　トーキン科学技術振興事業団研究奨励賞「表面吸着分子層のラマン散乱断面積の絶対値測定」