Prof. Matthew Tirrell セミナー

Prof. Matthew Tirrell (University of Chicago and Argonne National Laboratory) は高分子物理の世界的研究者です。

今回、Tirrell 先生のご来日の機会にご講演いただけることになりました。是非ともご参加下さいますようお願い申しあげます。

日時:2017年10月20日(金曜日)14:00~15:30

場所:京都大学宇治キャンパス おうばくプラザセミナー室1,2 (アクセス) (おうばくプラザ見取図)

講演題目: Polyelectrolytes in multivalent ionic media: New physics and new materials

講演概要: Multi-valent interactions in systems of polyelectrolytes can exhibit dramatic, non-monotonic effects, for example, switching forces from repulsive to attractive, and back to repulsive again, in some cases. We have been studying these patterns of behavior with the surface forces apparatus (SFA) and with electrochemical methods, such as cyclic voltametry, which enables the quantitative determination of the number of multi-valent ions residing in thin layers of charged polymers. At fixed ionic strength, all cause strong shrinkage and condensation of poly(styrene sulfonate) brushes over a narrow range of ratio multi-valent to mono-valent ions. When the multi-valent ion is an oppositely charged polymer, new fluid phases can form. Charged blocks in copolymers leads to materials with new types of ordered phases. Effects of these multi-valent interactions on supermolecular and biomolecular assembly will be discussed. There are many possibilities for the creation of new materials based on electrostatic assembly involving multi-valent interactions.

お問い合わせ先: 京都大学化学研究所 分子レオロジー領域 松宮 (email: matsmiya_at_scl.kyoto-u.ac.jp, phone: 0774-38-3136)


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Last-modified: 2017-09-06 (水) 16:46:12 (410d)