1999 Fiscal Year Annual Research Report

ナノメトリック有機分子膜の線形および非線形誘電分極率評価装置の開発

Research Project

Project/Area Number	09555095
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)	米田勝実日本レーザ電子株式会社, 代表取締役真島豊東京工業大学, 工学部, 助教授 (40293071)
Keywords	変位電流 / SHG / 誘電現象 / 非線型誘電物性 / 有機単分子膜 / 液晶 / オーダ・パラメータ / 緩和時間
Research Abstract	ほぼ当初の計画を達成できたと考えている。具体的な研究成果を要約すると以下のようになる。 (1)単分子膜の線形誘電率評価システムの開発、分子膜の構造変化と線形誘導率の評価 (1) 分子として生体膜関連のりん脂質分子、剛直性の分子として液晶関連のシアノビフェニール系の分子に着目し、水面上で形成される単分子膜の圧力刺激に対する変位電流を計測した。結果を踏まえて、分子膜モデル(ハードコアモデル)を用いて変位電流波形の解析を行い誘電緩和時間の評価を行うことができた。また、分子膜配向度をあらわす一次のオーダパラメータS_1を決定することができた。 (2) キラルな構造を持つ分子により構成される分子膜に特徴的な変位電流の検出、波形と分子の関係を理論的に明らかにすることができた。 (3) 混合キラル分子膜の相転移現象と分子膜パターンの関係を理論的に結びつけた。 (2)分子膜配向度評価法の確立 (非線形誘電率評価システム) 〔1〕シスートランス異性化によって流れる変位電流応答を解析し、マクロ的な立場から3状態モデルと変位電流の関係を明らかにすることができた。さらに、量子論的考察もできた。〔2〕水面上単分子膜からの光第2次高調波(SHG)を検出するシステムを構築した。5CB液晶性分子膜の構造対称性をC_<∞,v>と見立てて解析し、1次と3次の配向度S_1,S_3を独立に評価する方法を考案した。 [3] 構造対称性C_∞を有する分子膜の非線型感受率テンソルと分子配向度パラメータS_1,S_3との関係を理論的に結びつけることができた。さらに、キラルおよびアキラルな分子膜からのSHGについての解析をすることができ、開発したシステムを有効に活用できる見通しを得た。 (3) 界面を利用したエレクトロニクスへの展開弾性体理論を用いて界面分子の液晶への伝搬の様子を理論的に解析した。また、光透過率と容量の同時測定からこの様子を実験的に明らかにすることができた。

Research Products
(30 results)

All Other

All Publications (30 results)

[Publications] C.X.Wu and M.Iwamoto: "The calculation of the dielectric constant of dielectric anisotropic monolayer films on a material surface"Phys. Rev.. B55. 10922-10926 (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] M.Iwamoto and C.X.Wu: "Analysis of dielectric relaxation time of organic monolayer films on a material surface"Phys. Rev.. B56. 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 comformational 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] Y.Majima,Y.Sato and M.Iwamoto: "Dielectric relaxation phenomena of a liquid crystal monolayer at the airwater interface"Jpn. J. Appl. Phys.. 36. 5237-5241 (1997)
[Publications] Xiaobin Xu and Mitsumasa Iwamoto: "Molecular switching in phospholipid and azobenzene mixed monolayers using Maxwell-displacement-current-measuring technique"Jpn. J. Appl. Phys. 36. 7348-7353 (1997)
[Publications] Chen-Xu WU and Mitsumasa IWAMOTO: "Polar orientational phase transition in smectic monolayers induced by monolayer compression"Phys. Rev. E,. 57. 5740-5743 (1998)
[Publications] Yoko SATO,Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Determination of the piezoelectric coefficient of monolayers on water surface by Maxwell-displacement-current measurement"Jpn. J. Appl. Phys.. 37. 215-216 (1998)
[Publications] Yoko SATO,Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Determination of Dielectric Relaxation Time of Langmuir-films by a Whole-curve Method Using Maxwell Displacement Current"Jpn. J. Appl. Phys.. 37. 5655-5658 (1998)
[Publications] Mitsumasa IWAMOTO,Chen-Xu WU and Yoshinobu MIZUTANI: "Analysis of thermally stimulated Maxwell-displacement current across organic monolayers"J. Appl. Phys.. 83. 4891-4896 (1998)
[Publications] Yutaka MAJIMA,Yoko SATO,Chen-Xu WU and Mitsumasa IWAMOTO: "Investigation of Dielectric Relaxation Phenomena in Liquid Crystal Monolayer at the Air-Water Interface"Thin Solid Films. 327-329. 232-235 (1998)
[Publications] Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Analysis of Dielectric Relaxation Phenomena of Monolayer Films by Monolayer Compression"Thin Silid Films. 327-329. 228-231 (1998)
[Publications] Chen-Xu WU and Mitsumasa IWAMOTO: "Calculation of the dielectric constant of monolayers with dielectric anisotropy with a consideration of molecular configuration"Thin Solid Films. 327-329. 395-398 (1998)
[Publications] Mitsumasa IWAMOTO,Chen-Xu WU and Zhong-can OU-YANG: "Separation of chiral phases by compression: kinetic localization of the enantiomers in a monolayer of racemic amphiphilies viewed as cholesteric liquid crystals"Chem. Phys. Lett.. 285. 306-312 (1998)
[Publications] Yutaka MAJIMA,Keisuke KATO,Mitsumasa IWAMOTO and Kunihiro ICHIMURA: "Investigation of dynamic orientational process of nematic liquid crystals triggered by conformational change of surface monolayer"IEICE Trans.Electron. E81-C. 1070-1076 (1998)
[Publications] Keun-Ho PARK and Mitsumasa IWAMOTO: "Maxwell displacement current across Langmuir phospholipid and azobenzene mixed monolayers by photoisomerization"Mol.Cryst.Liq. Cryst. 316. 145-148 (1998)
[Publications] Chen-Xu WU,Zhong-can Ou-yang,and Mitsumasa IWAMOTO: "Polar orientational phase transition and differential dielectric constant of smectic monolayer films"J. Chem. Phys.. 109. 4552-4561 (1998)
[Publications] Xiaobin XU,Yutaka Majima and Mitsumasa IWAMOTO: "Molecular switching in phospholipid-azobenzene mixed monolayers by photoisomerization"Thin Solid Films. 331. 239-247 (1998)
[Publications] 福澤雅弘、吉武隆一、岩本光正: "水面上アゾベンゼン混合単分子膜の光変位電流"電気学会論文誌. 118-A. 1332-1340 (1998)
[Publications] Mitsumasa Iwamoto,Chen-xu Wu and Ou-yang,Zhong-can: "Pattern formation and chiral phase separation :Racemic monolayer viewd as Bragg-Williams binary cholesterics"Physical Review. E59. 586-591 (1999)
[Publications] Ou-yang Zhong-can,Xiao-Bin Xu,Chen-xu Wu and Mitsumasa Iwamoto: "Molecular twist transition in chiral and racemic phospholipid monolayers detected by Maxwell-displacement-current-measurements"Physicul Review. E59. 2105-2109 (1999)
[Publications] Wei Zhao,Chen-Xu Wu,Mitsumasa Iwamoto,Ou-Yang Zhong-can: "Modelingl analysis of molecular chiral effect detected by Maxwell-displacement-current measurements"J. Chem. Phys.. 110. 12131-12140 (1999)
[Publications] Yoko Sato,Chem-Xu Wo,Yutaka Majima,Mitsumasa Iwamoto: "Analysis of the Dielectric Relaxation Property of Phospholipid Monolayers by Maxwell Displacement Current Measurement"J. Colloid and Interface Science. 218. 118-121 (1999)
[Publications] Mitsumasa Iwamoto,Chen-Xu Wu,Ou-yang Zhong-can: "Tilting phase transition of Langmuir monolayers :a competition between steric repulsion and interaction of dipolar molecules with liquid surface"Chem. Phys. Lett.. 312. 7-13 (1999)
[Publications] Mitsumasa Iwamoto,Keisuke Kato,Astusi Matsumura,Yutaka Majima: "Orientational Transition of P-penty-p'-cyano-biphenyle Triggered by Conformational Change of surface Azobenzene Monolayar"Jpn. J. Appl. Phys.. 38. 5984-5990 (1999)
[Publications] Wei-Zhao,Chen-Xu Wu,Mitsumasa Iwamoto: "Rate-equation theory of azobenzene monolayer photoisomerization"Chem. Phys. Lett. 312. 572-577 (1999)

1999 Fiscal Year Annual Research Report

ナノメトリック有機分子膜の線形および非線形誘電分極率評価装置の開発

Principal Investigator

岩本 光正 東京工業大学, 工学部, 教授 (40143664)

Research Products

[Publications] C.X.Wu and M.Iwamoto: "The calculation of the dielectric constant of dielectric anisotropic monolayer films on a material surface"Phys. Rev.. B55. 10922-10926 (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] M.Iwamoto and C.X.Wu: "Analysis of dielectric relaxation time of organic monolayer films on a material surface"Phys. Rev.. B56. 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 comformational 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] Y.Majima,Y.Sato and M.Iwamoto: "Dielectric relaxation phenomena of a liquid crystal monolayer at the airwater interface"Jpn. J. Appl. Phys.. 36. 5237-5241 (1997)

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

[Publications] Chen-Xu WU and Mitsumasa IWAMOTO: "Polar orientational phase transition in smectic monolayers induced by monolayer compression"Phys. Rev. E,. 57. 5740-5743 (1998)

[Publications] Yoko SATO,Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Determination of the piezoelectric coefficient of monolayers on water surface by Maxwell-displacement-current measurement"Jpn. J. Appl. Phys.. 37. 215-216 (1998)

[Publications] Yoko SATO,Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Determination of Dielectric Relaxation Time of Langmuir-films by a Whole-curve Method Using Maxwell Displacement Current"Jpn. J. Appl. Phys.. 37. 5655-5658 (1998)

[Publications] Mitsumasa IWAMOTO,Chen-Xu WU and Yoshinobu MIZUTANI: "Analysis of thermally stimulated Maxwell-displacement current across organic monolayers"J. Appl. Phys.. 83. 4891-4896 (1998)

[Publications] Yutaka MAJIMA,Yoko SATO,Chen-Xu WU and Mitsumasa IWAMOTO: "Investigation of Dielectric Relaxation Phenomena in Liquid Crystal Monolayer at the Air-Water Interface"Thin Solid Films. 327-329. 232-235 (1998)

[Publications] Chen-Xu WU,Yutaka MAJIMA and Mitsumasa IWAMOTO: "Analysis of Dielectric Relaxation Phenomena of Monolayer Films by Monolayer Compression"Thin Silid Films. 327-329. 228-231 (1998)

[Publications] Chen-Xu WU and Mitsumasa IWAMOTO: "Calculation of the dielectric constant of monolayers with dielectric anisotropy with a consideration of molecular configuration"Thin Solid Films. 327-329. 395-398 (1998)

[Publications] Mitsumasa IWAMOTO,Chen-Xu WU and Zhong-can OU-YANG: "Separation of chiral phases by compression: kinetic localization of the enantiomers in a monolayer of racemic amphiphilies viewed as cholesteric liquid crystals"Chem. Phys. Lett.. 285. 306-312 (1998)

[Publications] Yutaka MAJIMA,Keisuke KATO,Mitsumasa IWAMOTO and Kunihiro ICHIMURA: "Investigation of dynamic orientational process of nematic liquid crystals triggered by conformational change of surface monolayer"IEICE Trans.Electron. E81-C. 1070-1076 (1998)

[Publications] Keun-Ho PARK and Mitsumasa IWAMOTO: "Maxwell displacement current across Langmuir phospholipid and azobenzene mixed monolayers by photoisomerization"Mol.Cryst.Liq. Cryst. 316. 145-148 (1998)

[Publications] Chen-Xu WU,Zhong-can Ou-yang,and Mitsumasa IWAMOTO: "Polar orientational phase transition and differential dielectric constant of smectic monolayer films"J. Chem. Phys.. 109. 4552-4561 (1998)

[Publications] Xiaobin XU,Yutaka Majima and Mitsumasa IWAMOTO: "Molecular switching in phospholipid-azobenzene mixed monolayers by photoisomerization"Thin Solid Films. 331. 239-247 (1998)

[Publications] 福澤雅弘、吉武隆一、岩本光正: "水面上アゾベンゼン混合単分子膜の光変位電流"電気学会論文誌. 118-A. 1332-1340 (1998)

[Publications] Mitsumasa Iwamoto,Chen-xu Wu and Ou-yang,Zhong-can: "Pattern formation and chiral phase separation :Racemic monolayer viewd as Bragg-Williams binary cholesterics"Physical Review. E59. 586-591 (1999)

[Publications] Ou-yang Zhong-can,Xiao-Bin Xu,Chen-xu Wu and Mitsumasa Iwamoto: "Molecular twist transition in chiral and racemic phospholipid monolayers detected by Maxwell-displacement-current-measurements"Physicul Review. E59. 2105-2109 (1999)

[Publications] Wei Zhao,Chen-Xu Wu,Mitsumasa Iwamoto,Ou-Yang Zhong-can: "Modelingl analysis of molecular chiral effect detected by Maxwell-displacement-current measurements"J. Chem. Phys.. 110. 12131-12140 (1999)

[Publications] Yoko Sato,Chem-Xu Wo,Yutaka Majima,Mitsumasa Iwamoto: "Analysis of the Dielectric Relaxation Property of Phospholipid Monolayers by Maxwell Displacement Current Measurement"J. Colloid and Interface Science. 218. 118-121 (1999)

[Publications] Mitsumasa Iwamoto,Chen-Xu Wu,Ou-yang Zhong-can: "Tilting phase transition of Langmuir monolayers :a competition between steric repulsion and interaction of dipolar molecules with liquid surface"Chem. Phys. Lett.. 312. 7-13 (1999)

[Publications] Mitsumasa Iwamoto,Keisuke Kato,Astusi Matsumura,Yutaka Majima: "Orientational Transition of P-penty-p'-cyano-biphenyle Triggered by Conformational Change of surface Azobenzene Monolayar"Jpn. J. Appl. Phys.. 38. 5984-5990 (1999)

[Publications] Wei-Zhao,Chen-Xu Wu,Mitsumasa Iwamoto: "Rate-equation theory of azobenzene monolayer photoisomerization"Chem. Phys. Lett. 312. 572-577 (1999)

岩本光正東京工業大学, 工学部, 教授 (40143664)