1997 Fiscal Year Annual Research Report

変位電流法による分子膜ナノ界面の誘電・電子的構造の解析と分子形態記録

Research Project

Project/Area Number	09450122
Research Institution	Tokyo Institute of Technology
Principal Investigator	岩本光正東京工業大学, 工学部, 教授 (40143664)
Co-Investigator(Kenkyū-buntansha)	久保田徹郵政省, 通信総合研究所・関西先端研究センター, 主任研究官 (00205139) 真島豊東京工業大学, 大学院・総合理工学研究科, 助手 (40293071)
Keywords	有機分子膜 / 変位電流法 / 表面電位法 / 誘電率 / 双極子 / 電気物性 / 相転移 / 光異性化
Research Abstract	本研究は、申請者の提案した単分子膜の電気物性の評価法である変位電流法を基礎として、各種の外部刺激を分子膜に加えた時に発生するナノ有機膜界面における電子移動による電子状態変化と分子の形態変化に着目して、こうした変化を変位電流や表面電位法により計測して、誘電体電子物性の立場から、双極性分子の物質界面での誘電性、さらには分子膜界面のナノ領域のナノ界面電子移動現象を解き明かす手法を開発することを目的としている。また、この目的より物質界面での電子の微視的移動や分子形態変化の様が定量的に明かとなるので、この結果を踏まえて、超構造分子膜内での電子の微視的変位および双極性分子の形態変化に基づく光・変位電流変換型の記録素子の試作などを行う事を狙って計画されたものである。具体的に、下記のような成果が得られている。 (l)双極性ナノ界面電子物性評価ブラウン運動方程式を基礎として、分子膜の誘電緩和時間や配向度の変化を理論的かつ実験的に評価することができた。また、双極性分子膜の相転移温度の評価、基板効果を考慮した誘電異方性を持つ分子の誘電的構造を理論及び実験的に明らかにできた。 (2)電子性ナノ界面電子物性評価 (1)超構造分子膜内での電子の移動電荷量および移動速度を評価できた。(2)金属と分子膜界面での移動電荷により形成されるナノ界面の空間的電荷分布およびエネルギー準位分布を実験的かつ理論羽的に評価できた。 (3)界面を利用したエレクトロニクスヘの展開 (l)光異性化による分子の形態変化の記録と液晶性極性分子の配向変化に関する基礎的な知見を得た。

Research Products
(32 results)

All Other

All Publications (32 results)

[Publications] C.X.Wu, Y.Mizutani and M.Iwamoto: "Analysis of Thermally Dielectric Relaxation Phenomena in Organic Monolayer Films by Debye Brownian Motion Equation" Jpn.J.Appl.Phys.36. 222-225 (1997)
[Publications] C.X.Wu and M.Iwamoto: "Calculation of Molecular Orientational Order and Maxwell Displacement Current of Biaxial Molecules at the Air-liquid Interface" Jpn.J.Appl.Phys.37. 824-828 (1997)
[Publications] C.X.Wu and M.Iwamoto: "The calculation of the dielectric constant of dielectric anisotropic monolayer films on a material surface" Phys.Rev.B. 55. 10922-10926 (1997)
[Publications] M.Iwamoto and C.X.Wu: "Analysis of dielectric relaxation time of organic monolayer films on a material surface" Phys.Rev.B. 56. 3721-3724 (1997)
[Publications] C.X.Wu, S.Kuragasaki, and M.Iwamoto: "Maxwell displacement current across monolayers with dielectric anisotropy due to biaxiality on a water surface" Jpn.J.Appl.Phys.36. 2775-2780 (1997)
[Publications] M.Iwamoto, W.Y.Kim, and C.X.Wu: "Generation of Maxwell displacement current across nematic liquid crystal cells triggered by conformational change of surface monolayer" J.Chem.Phys.106. 9815-9819 (1997)
[Publications] C.X.Wu and M.Iwamoto: "Analysis of dielectric dispersion property of organic monolayer films on a material surface" Jpn.J.Appl.Phys.36. 5570-5574 (1997)
[Publications] C.X.Wu, W.Y.Kim, S.Kuragasaki, and M.Iwamoto: "Calculation of bipolar molecules at an air-liquid interface" Mol.Cryst.Liq.Cryst.294. 75-78 (1997)
[Publications] M.Iwamoto, T.Kubota, and M.R.Muhamad: "Maxwell displacement current due to phase transitions in liquid crystals on a water surface" Thin Solid Films. 293. 299-302 (1997)
[Publications] M.Iwamoto, A.Sugimura, and Z.C.Ou-Yang: "The behavior of the Maxwell displacement current for a biaxial model of monolayers at the liquid-air interface" Chem.Phys.Lett.274. 505-512 (1997)
[Publications] Y.Majima, Y.Sato, and M.Iwamoto: "Dielectric relaxation phenomena of a liquid crystal monolayers at the air-water interface" Jpn.J.Appl.Phys.36. 5237-5241 (1997)
[Publications] X.B.Xu and M.Iwamoto: "Molecular switching in phospholipid and azobenzene mixed monolayers using Maxwell-displacement-current-measuring technique" Jpn.J.Appl.Phys.36. 7348-7353 (1997)
[Publications] X.B.Xu and M.Iwamoto: "Molecular switching in single azobenzene monolayers" Ferroelectrics. 196. 269-276 (1997)
[Publications] K.H.Park and M.Iwamoto: "Maxwell Displacement Current across Langmuir Phospholipid Monolayers mixed with Azobenzene by photoisomerization" J.Colloid and interface Sci.193. 76- (1997)
[Publications] E.Itoh and M.Iwamoto: "Electronic Density of state in metal/polyimide Langmuir-Blodgett film interface and its temperature dependence" J.Appl.Phys.81. 1790-1797 (1997)
[Publications] E.Itoh and M.Iwamoto: "Charge exchange phenomena and the electronic density of state at metal/Langmuir-Blodgett film interface" Mol.Cryst.Liq.Cryst.294. 189-192 (1997)
[Publications] M.Iwamoto: "Electrostatic properties of electrical insulating ultrathin polyimide films" Ekt. 50. 67-75 (1997)
[Publications] M.Iwamoto and E.Itoh: "Nano-Electrostatic Phenomena in Langmuir-Blodgett Films and Molecular rectification" accepted for publication in Thin Soild Films. (1998)
[Publications] E.Itoh, H.Kokubo, M.Iwamoto, M.Burghard, S.Roth and M.Hanack: "Electrostatic Phenomena in π-conjugated Langmuir-Blodgett Films on Metal electrodes" Jpn.J.Appl.Phys.in press. (1998)
[Publications] E.Itoh, H.kokubo, S.shouriki and M.Iwamoto: "Surface potential of Phthalocyanine Langmuir-Blodgett Films on metal electrodes." J.Appl.Phys.in press. (1998)
[Publications] 高野和也, 岩本光正: "5CB 液晶セルの低周波誘電分散特性" 電子情報通信学会論文誌. 80. 222-225 (1997)
[Publications] Y.Sato, C.X.Wu, Y.Majima and M.Iwamoto: "Determination of the piezoelectric coefficient of monolayers on water surface by Maxwell displacement current measurement" Jpn.Appl.Phys.37. 215-216 (1998)
[Publications] 岩本光正: "有機材料・超薄膜の電子デバイスへの応用" 電子情報通信学会誌. 80. 63-66 (1997)
[Publications] Eiji Itoh and Mitsumasa Iwamoto: "Electron Density of State at Metal/Polyimide Langmuir-Blodgett Film Interface" 5th International Conference on Properties and Application of Dielectric Materials. 04P10. 360-363 (1997)
[Publications] Mitsumasa Iwamoto: "Maxwell Displacement Current across Monolayers and its Application to Monolayer-film Devices" 5th International Conference on Properties and Application of Dielectric Materials. 07O01. 515-518 (1997)
[Publications] Kyung Sup Lee, Tohru Kubota and Mitsumasa Iwamoto: "Generation of Maxwell-displacement current across phospholipid monolayers on a water surface" 5th International Conference on Properties and Application of Dielectric Materials. 07P12. 555-558 (1997)
[Publications] Woo-Yeon Kim and Mitsumasa Iwamoto: "Generation of Maxwell-displacement current and Photoregulation of Liquid Crystal Alignment Using azobenzene monolayers" 5th International Conference on Properties and Application of Dielectric Materials. 07P08. 538-540 (1997)
[Publications] Chen-Xu Wu, Yutaka Majima and Mitsumasa Iwamoto: "Analysis of Dielectric Relaxation Phenomena of Monolayer Films by Monolayer Compression" The Eighth International Conference on Organized Molecular Films. 3-O-7. (1997)
[Publications] Yutaka Majima, Yoko Sato, Chen-Xu Wu and Mitsumasa: "Investigation of Dielectric Relaxation Phenomena in Liquid Crystal Monolayer at the Air-Water Interface" The Eighth International Conference on Organized Molecular Films. 3-P-2. (1997)
[Publications] Chen-Xu Wu and Mitsumasa Iwamoto: "Calculation of the Dielectric Constant of Monolayers with Dielectric Anisotropy" The Eighth International Conference on Organized Molecular Films. 5-P-15. (1997)
[Publications] Mitsumasa Iwamoto and Eiji Itoh: "Nano-metric Electrostatic Phenomena in Langmuir-Blodgett Films and Molecular Rectification" International Workshop on Nano-molecular Electronics '97. P-01. (1997)
[Publications] Xiaobin Xu, Yutaka Majima and Mitsumasa Iwamoto: "Molecular Switching in Phospholipid-azobenzene Mixed Monolayers by Photoisomerization" International Workshop on Nano-molecular Electronics '97. P-26. (1997)

1997 Fiscal Year Annual Research Report

変位電流法による分子膜ナノ界面の誘電・電子的構造の解析と分子形態記録

Principal Investigator

岩本 光正 東京工業大学, 工学部, 教授 (40143664)

Research Products

[Publications] C.X.Wu, Y.Mizutani and M.Iwamoto: "Analysis of Thermally Dielectric Relaxation Phenomena in Organic Monolayer Films by Debye Brownian Motion Equation" Jpn.J.Appl.Phys.36. 222-225 (1997)

[Publications] C.X.Wu and M.Iwamoto: "Calculation of Molecular Orientational Order and Maxwell Displacement Current of Biaxial Molecules at the Air-liquid Interface" Jpn.J.Appl.Phys.37. 824-828 (1997)

[Publications] C.X.Wu and M.Iwamoto: "The calculation of the dielectric constant of dielectric anisotropic monolayer films on a material surface" Phys.Rev.B. 55. 10922-10926 (1997)

[Publications] M.Iwamoto and C.X.Wu: "Analysis of dielectric relaxation time of organic monolayer films on a material surface" Phys.Rev.B. 56. 3721-3724 (1997)

[Publications] C.X.Wu, S.Kuragasaki, and M.Iwamoto: "Maxwell displacement current across monolayers with dielectric anisotropy due to biaxiality on a water surface" Jpn.J.Appl.Phys.36. 2775-2780 (1997)

[Publications] M.Iwamoto, W.Y.Kim, and C.X.Wu: "Generation of Maxwell displacement current across nematic liquid crystal cells triggered by conformational change of surface monolayer" J.Chem.Phys.106. 9815-9819 (1997)

[Publications] C.X.Wu and M.Iwamoto: "Analysis of dielectric dispersion property of organic monolayer films on a material surface" Jpn.J.Appl.Phys.36. 5570-5574 (1997)

[Publications] C.X.Wu, W.Y.Kim, S.Kuragasaki, and M.Iwamoto: "Calculation of bipolar molecules at an air-liquid interface" Mol.Cryst.Liq.Cryst.294. 75-78 (1997)

[Publications] M.Iwamoto, T.Kubota, and M.R.Muhamad: "Maxwell displacement current due to phase transitions in liquid crystals on a water surface" Thin Solid Films. 293. 299-302 (1997)

[Publications] M.Iwamoto, A.Sugimura, and Z.C.Ou-Yang: "The behavior of the Maxwell displacement current for a biaxial model of monolayers at the liquid-air interface" Chem.Phys.Lett.274. 505-512 (1997)

[Publications] Y.Majima, Y.Sato, and M.Iwamoto: "Dielectric relaxation phenomena of a liquid crystal monolayers at the air-water interface" Jpn.J.Appl.Phys.36. 5237-5241 (1997)

[Publications] X.B.Xu and M.Iwamoto: "Molecular switching in phospholipid and azobenzene mixed monolayers using Maxwell-displacement-current-measuring technique" Jpn.J.Appl.Phys.36. 7348-7353 (1997)

[Publications] X.B.Xu and M.Iwamoto: "Molecular switching in single azobenzene monolayers" Ferroelectrics. 196. 269-276 (1997)

[Publications] K.H.Park and M.Iwamoto: "Maxwell Displacement Current across Langmuir Phospholipid Monolayers mixed with Azobenzene by photoisomerization" J.Colloid and interface Sci.193. 76- (1997)

[Publications] E.Itoh and M.Iwamoto: "Electronic Density of state in metal/polyimide Langmuir-Blodgett film interface and its temperature dependence" J.Appl.Phys.81. 1790-1797 (1997)

[Publications] E.Itoh and M.Iwamoto: "Charge exchange phenomena and the electronic density of state at metal/Langmuir-Blodgett film interface" Mol.Cryst.Liq.Cryst.294. 189-192 (1997)

[Publications] M.Iwamoto: "Electrostatic properties of electrical insulating ultrathin polyimide films" Ekt. 50. 67-75 (1997)

[Publications] M.Iwamoto and E.Itoh: "Nano-Electrostatic Phenomena in Langmuir-Blodgett Films and Molecular rectification" accepted for publication in Thin Soild Films. (1998)

[Publications] E.Itoh, H.Kokubo, M.Iwamoto, M.Burghard, S.Roth and M.Hanack: "Electrostatic Phenomena in π-conjugated Langmuir-Blodgett Films on Metal electrodes" Jpn.J.Appl.Phys.in press. (1998)

[Publications] E.Itoh, H.kokubo, S.shouriki and M.Iwamoto: "Surface potential of Phthalocyanine Langmuir-Blodgett Films on metal electrodes." J.Appl.Phys.in press. (1998)

[Publications] 高野和也, 岩本光正: "5CB 液晶セルの低周波誘電分散特性" 電子情報通信学会論文誌. 80. 222-225 (1997)

[Publications] Y.Sato, C.X.Wu, Y.Majima and M.Iwamoto: "Determination of the piezoelectric coefficient of monolayers on water surface by Maxwell displacement current measurement" Jpn.Appl.Phys.37. 215-216 (1998)

[Publications] 岩本光正: "有機材料・超薄膜の電子デバイスへの応用" 電子情報通信学会誌. 80. 63-66 (1997)

[Publications] Eiji Itoh and Mitsumasa Iwamoto: "Electron Density of State at Metal/Polyimide Langmuir-Blodgett Film Interface" 5th International Conference on Properties and Application of Dielectric Materials. 04P10. 360-363 (1997)

[Publications] Mitsumasa Iwamoto: "Maxwell Displacement Current across Monolayers and its Application to Monolayer-film Devices" 5th International Conference on Properties and Application of Dielectric Materials. 07O01. 515-518 (1997)

[Publications] Kyung Sup Lee, Tohru Kubota and Mitsumasa Iwamoto: "Generation of Maxwell-displacement current across phospholipid monolayers on a water surface" 5th International Conference on Properties and Application of Dielectric Materials. 07P12. 555-558 (1997)

[Publications] Woo-Yeon Kim and Mitsumasa Iwamoto: "Generation of Maxwell-displacement current and Photoregulation of Liquid Crystal Alignment Using azobenzene monolayers" 5th International Conference on Properties and Application of Dielectric Materials. 07P08. 538-540 (1997)

[Publications] Chen-Xu Wu, Yutaka Majima and Mitsumasa Iwamoto: "Analysis of Dielectric Relaxation Phenomena of Monolayer Films by Monolayer Compression" The Eighth International Conference on Organized Molecular Films. 3-O-7. (1997)

[Publications] Yutaka Majima, Yoko Sato, Chen-Xu Wu and Mitsumasa: "Investigation of Dielectric Relaxation Phenomena in Liquid Crystal Monolayer at the Air-Water Interface" The Eighth International Conference on Organized Molecular Films. 3-P-2. (1997)

[Publications] Chen-Xu Wu and Mitsumasa Iwamoto: "Calculation of the Dielectric Constant of Monolayers with Dielectric Anisotropy" The Eighth International Conference on Organized Molecular Films. 5-P-15. (1997)

[Publications] Mitsumasa Iwamoto and Eiji Itoh: "Nano-metric Electrostatic Phenomena in Langmuir-Blodgett Films and Molecular Rectification" International Workshop on Nano-molecular Electronics '97. P-01. (1997)

[Publications] Xiaobin Xu, Yutaka Majima and Mitsumasa Iwamoto: "Molecular Switching in Phospholipid-azobenzene Mixed Monolayers by Photoisomerization" International Workshop on Nano-molecular Electronics '97. P-26. (1997)

岩本光正東京工業大学, 工学部, 教授 (40143664)