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Research Output 1990 2019

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2000
4 Citations (Scopus)

Computational and experimental studies of azobenzene dendrons for non-linear optical applications

Yokoyama, S., Mashiko, S., Yamaguchi, Y. & Yokomichi, Y., Aug 1 2000, In : Polymers for Advanced Technologies. 11, 8-12, p. 692-697 6 p.

Research output: Contribution to journalArticle

Dendrimers
Azobenzene
Chromophores
Molecular dynamics
Harmonic generation
13 Citations (Scopus)

Current-voltage characteristics with a step structure of metal/polyirnide/rhodamine-dendrirner/polyimide/ metal junction

Noguchü, Y., Majima, Y., Iwamoto, M., Kubota, T., Yokoyama, S., Nakahama, T. & Mashiko, S., Jan 1 2000, In : IEICE Transactions on Electronics. E83-C, 7, p. 1076-1080 5 p.

Research output: Contribution to journalArticle

Rhodamines
Current voltage characteristics
Polyimides
Metals
Coulomb blockade
159 Citations (Scopus)

Intermolecular coupling enhancement of the molecular hyperpolarizability in multichromophoric dipolar dendrons

Yokoyama, S., Nakahama, T., Otomo, A. & Mashiko, S., Apr 5 2000, In : Journal of the American Chemical Society. 122, 13, p. 3174-3181 8 p.

Research output: Contribution to journalArticle

Dendrimers
Azobenzene
Chromophores
Macromolecules
Optical Rotation
1 Citation (Scopus)

Molecular assembled structure and nonlinar optical property of azobenzene dendrimers

Yokoyama, S. & Mashiko, S., Jan 1 2000, In : KOBUNSHI RONBUNSHU. 57, 10, p. 637-645 9 p.

Research output: Contribution to journalArticle

Dendrimers
Azobenzene
optical property
energetics
Optical properties
4 Citations (Scopus)

Molecular design of novel azobenzene dendrimers

Yamaguchi, Y., Yokomichi, Y., Yokoyama, S. & Mashiko, S., Aug 1 2000, In : Polymers for Advanced Technologies. 11, 8-12, p. 674-684 11 p.

Research output: Contribution to journalArticle

Dendrimers
Azobenzene
Chloroform
Chlorine compounds
Molecular dynamics
51 Citations (Scopus)

Supernarrowing mirrorless laser emission in dendrimer-doped polymer waveguides

Otomo, A., Yokoyama, S., Nakahama, T. & Mashiko, S., Dec 11 2000, In : Applied Physics Letters. 77, 24, p. 3881-3883 3 p.

Research output: Contribution to journalArticle

dendrimers
waveguides
waveguide lasers
polymers
rhodamine
1998
25 Citations (Scopus)

Second harmonic generation of dipolar dendrons in the assembled thin films

Yokoyama, S., Nakahama, T., Otomo, A. & Mashiko, S., Jan 1 1998, In : Thin Solid Films. 331, 1-2, p. 248-253 6 p.

Research output: Contribution to journalArticle

Dendrimers
Harmonic generation
harmonic generations
Thin films
thin films
1997
11 Citations (Scopus)
Langmuir Blodgett films
Langmuir-Blodgett films
Macromolecules
macromolecules
Dendrimers
43 Citations (Scopus)

Preparation and assembled structure of dipolar dendrons based electron donor/acceptor azobenzene branching

Yokoyama, S., Nakahama, T., Otomo, A. & Mashiko, S., Jan 1 1997, In : Chemistry Letters. 11, p. 1137-1138 2 p.

Research output: Contribution to journalArticle

Dendrimers
Fatty Acids
Electrons
azobenzene
2 Citations (Scopus)

The preparation, orientation and electronic structure of poly(p-phenylenevinylene) (PPV) monolayers on silicon surfaces

Keil, M., Rajagopal, A., Yokoyama, S., Sotobayashi, H., Bradshaw, A. M., Kakimoto, M. A. & Imai, Y., Dec 1 1997, In : Zeitschrift fur Physikalische Chemie. 202, 1-2, p. 87-102 16 p.

Research output: Contribution to journalArticle

Silicon
Electronic structure
Monolayers
Polymers
X ray absorption spectroscopy
1996
17 Citations (Scopus)

Absolute orientation of pendant chromophores attached to the polymer backbone in monolayers at interfaces studied by phase measurement of second-harmonic generation

Kajikawa, K., Yamada, T., Yokoyama, S., Okada, S., Matsuda, H., Nakanishi, H., Kakimoto, M. A., Imai, Y., Takezoe, H. & Fukuda, A., Jan 24 1996, In : Langmuir. 12, 2, p. 580-583 4 p.

Research output: Contribution to journalArticle

Phase measurement
Chromophores
Harmonic generation
chromophores
Monolayers

Morphology study of polyamic acid alkyl amine salts and polyimide Langmuir-Blodgett films by atomic force microscopy

Kakimoto, M. A., Yokoyama, S. & Imai, Y., Aug 1996, In : Unknown Journal. 37, 2, p. 565-566 2 p.

Research output: Contribution to journalArticle

atomic force microscopy
Langmuir Blodgett films
Polyimides
Amines
Atomic force microscopy
2 Citations (Scopus)

STM studies of polyimide monolayers on gold{111} surfaces

Yokoyama, S., Keil, M., Sotobayashi, H., Bradshaw, A. M., Kakimoto, M., Imai, Y. & Lamont, C. L. A., Dec 1 1996, In : Zeitschrift fur Physikalische Chemie. 196, 1, p. 43-54 12 p.

Research output: Contribution to journalArticle

polyimides
Polyimides
Gold
Monolayers
Polymers
7 Citations (Scopus)

Surface observation of Langmuir-Blodgett films of polyamic acid alkylamine salts and polyimide by atomic force microscopy and friction force microscopy

Yokoyama, S., Kakimoto, M. & Imai, Y., Aug 15 1996, In : Synthetic Metals. 81, 2-3, p. 265-270 6 p.

Research output: Contribution to journalArticle

Langmuir Blodgett films
Langmuir-Blodgett films
polyimides
Polyimides
Atomic force microscopy
8 Citations (Scopus)

Surface structure and orientation of polyamic acid alkylamine salt Langmuir-Blodgett films having an azobenzene pendant unit

Yokoyama, S., Kakimoto, M. A., Imai, Y., Yamada, T., Kajikawa, K., Takezoe, H. & Fukuda, A., Jan 1 1996, In : Thin Solid Films. 273, 1-2, p. 254-257 4 p.

Research output: Contribution to journalArticle

Azobenzene
Langmuir Blodgett films
Langmuir-Blodgett films
Surface structure
Salts
1995
43 Citations (Scopus)

Azimuthal Photoregulation of a Liquid Crystal with an Azobenzene-Modified Polyimide Langmuir-Blodgett Monolayer

Akiyama, H., Kudo, K., Ichimura, K., Yokoyama, S., Kakimoto, M. A. & Imai, Y., Mar 1 1995, In : Langmuir. 11, 3, p. 1033-1037 5 p.

Research output: Contribution to journalArticle

Liquid Crystals
Azobenzene
polyimides
Polyimides
Liquid crystals
3 Citations (Scopus)

The structure of PMDA-PDA polyimide monolayers adsorbed on gold surfaces

Keil, M., Paggel, J. J., Schedel-Niedrig, T., Yokoyama, S., Sotobayashi, H. & Bradshaw, A. M., Jan 1 1995, In : Applied Surface Science. 90, 3, p. 377-381 5 p.

Research output: Contribution to journalArticle

Personal digital assistants
Polyimides
Gold
Monolayers
Scanning tunneling microscopy
1994
3 Citations (Scopus)

Displacement current generation across single monolayers of polyamic acids having pendant groups at the air-water interface

Naruse, H., Iwamoto, M., Yokoyama, S., Kakimoto, M. A. & Imai, Y., Apr 15 1994, In : Thin Solid Films. 242, 1-2, p. 220-222 3 p.

Research output: Contribution to journalArticle

Monolayers
surface water
acids
Acids
Water
22 Citations (Scopus)

Further investigation of the preparation process of poly(p-phenylenevinylene) Langmuir-Blodgett films

Wu, A., Yokoyama, S., Watanabe, S., Kakimoto, M. A., Imai, Y., Araki, T. & Iriyama, K., May 15 1994, In : Thin Solid Films. 244, 1-2, p. 750-753 4 p.

Research output: Contribution to journalArticle

Langmuir Blodgett films
Langmuir-Blodgett films
Heat treatment
preparation
Sulfides
14 Citations (Scopus)

Imidization Process in a Dye-Labeled Poly(amic acid) Langmuir-Blodgett Film Studied by Optical Second-Harmonic Generation

Yamada, T., Yokoyama, S., Kajikawa, K., Ishikawa, K., Takezoe, H., Fukuda, A., Kakimoto, M. A. & Imai, Y., Apr 1 1994, In : Langmuir. 10, 4, p. 1160-1163 4 p.

Research output: Contribution to journalArticle

Langmuir Blodgett films
Langmuir-Blodgett films
Harmonic generation
harmonic generations
Coloring Agents
9 Citations (Scopus)

Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer

Yokoyama, S., Yamada, T., Kajikawa, K., Kakimoto, M. A., Imai, Y., Takezoe, H. & Fukuda, A., Dec 1 1994, In : Langmuir. 10, 12, p. 4599-4605 7 p.

Research output: Contribution to journalArticle

Siloxanes
polysiloxanes
Azobenzene
Self assembled monolayers
polyimides
12 Citations (Scopus)

Observation of phase‐separated polymeric LB films using scanning probe microscopy

Yuba, T., Yokoyama, S., Kakimoto, MA. A. & Imai, Y., Jan 1 1994, In : Advanced Materials. 6, 11, p. 888-889 2 p.

Research output: Contribution to journalArticle

Scanning probe microscopy
Polymer films
Polyimides
Phase separation
Microscopic examination
19 Citations (Scopus)

Photochemically Inducible and Erasable Dichroism by Molecular Reorientation of an Azobenzene Pendant Unit in a Polyimide Langmuir‒Blodgett Film

Yokoyama, S., Kakimoto, M. A. & Imai, Y., Dec 1 1994, In : Langmuir. 10, 12, p. 4594-4598 5 p.

Research output: Contribution to journalArticle

Azobenzene
Dichroism
polyimides
Polyimides
dichroism
5 Citations (Scopus)

Photochemical memory system in polyimide Langmuir-Blodgett film with azobenzene pendant group

Yokoyama, S., Kakimoto, M. A. & Imai, Y., Apr 15 1994, In : Thin Solid Films. 242, 1-2, p. 183-186 4 p.

Research output: Contribution to journalArticle

Photoisomerization
Azobenzene
Langmuir Blodgett films
Langmuir-Blodgett films
polyimides
1993
13 Citations (Scopus)
group dynamics
Optical anisotropy
Photoisomerization
Azobenzene
Langmuir Blodgett films
25 Citations (Scopus)

Preparation and In-Plane Anisotropic Photobleaching Properties of Polyimide Langmuir-Blodgett Films Having a Photoresponsive p-Nitroazobenzene Pendant Group

Yokoyama, S., Kakimoto, M. A. & Imai, Y., Jan 1 1993, In : Langmuir. 9, 4, p. 1086-1091 6 p.

Research output: Contribution to journalArticle

Photobleaching
Langmuir Blodgett films
Langmuir-Blodgett films
polyimides
Polyimides
1990
4 Citations (Scopus)

Synthesis of ultra‐thin films of aromatic polymers at air/water interface

Ueda, T., Yokoyama, S., Watanabe, M., Sanui, K. & Ogat, N., Nov 1990, In : Journal of Polymer Science Part A: Polymer Chemistry. 28, 12, p. 3221-3230 10 p.

Research output: Contribution to journalArticle

Aromatic polymers
Ultrathin films
Polymers
Water
Air