Direct Observation of Poly(macromonomer) by Scanning Tunneling Microscopy^*1

• Unayama Shin–ichi

  Department of Applied Physics, School of Engineering, The University of Tokyo, Tokyo 113, Japan

• Nakajima Ken

  Department of Applied Physics, School of Engineering, The University of Tokyo, Tokyo 113, Japan

• Ikehara Takayuki

  Department of Applied Physics, School of Engineering, The University of Tokyo, Tokyo 113, Japan

• Nishi Toshio

  Department of Applied Physics, School of Engineering, The University of Tokyo, Tokyo 113, Japan

• Tsukahara Yasuhisa

  Department of Materials Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606, Japan

書誌事項

タイトル別名

• Direct Observation of Poly(macromonomer) by Scanning Tunneling Microscopy.

抄録

Direct observation of a single molecule of poly(macromonomer) adsorbed on a highly oriented pyrolytic graphite was carried out by scanning tunneling microscopy (STM). The poly(macromonomer) studied is multibranched polystyrene possessing very dense polystyrene side chains of uniform molecular weight, which was prepared by polymerization of polystyrene macromonomers. It was revealed that the polystyrene side chains of the poly(macromonomer) extended from the main chain and were observed as an array of parallel lines on the graphite. The interval between the side chains was estimated as 0.42±0.03 nm. This value indicates that the main chain does not have an all-trans conformation but a TG⁺TG^- conformation of the staggered model with alternate arrangement of the side chains, although the main chain is highly extended. We also observed an intramolecular structure, i.e., phenyl groups in the side chain. The distance between the two nearest-neighbor phenyl groups in the same side chain was observed as approximately 0.30 nm, indicating that each side chain is adsorbed on the graphite surface with strong intra- and intermolecular interactions. It was also confirmed by STM that the polymerization of macromonomers took place to form poly(macromonomer) in spite of the extremely high segment density.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 35 (4A), 2280-2283, 1996

  The Japan Society of Applied Physics

キーワード

• poly(macromonomer)
• highly oriented pyrolytic graphite
• scanning tunneling microscopy
• multibranched polystyrene
• staggered model

詳細情報

• CRID: 1390001206244894208
• NII論文ID: 30021825939
• NII論文ID: 110003905153
• NII論文ID: 210000039142
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.35.2280
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.35.2280
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.35.2280/pdf
• 本文言語コード: en
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• 抄録ライセンスフラグ: 使用不可