Transient Reciprocating Motion of a Self-Propelled Object Controlled by a Molecular Layer of a N-Stearoyl-p-nitroaniline: Dependence on the Temperature of an Aqueous Phase

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• 作者：Satoshi Nakata ; Tomoaki Ueda ; Tatsuya Miyaji ; Yui Matsuda ; Yukiteru Katsumoto ; Hiroyuki Kitahata ; Takafumi Shimoaka ; Takeshi Hasegawa
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：July 10, 2014
• 年：2014
• 卷：118
• 期：27
• 页码：14888-14893
• 全文大小：342K
• ISSN：1932-7455

文摘

The mode-bifurcation of a self-propelled system induced by the property of a N-stearoyl-p-nitroaniline (C₁₈ANA) monolayer developed on an aqueous phase was studied. A camphor disk was placed on a C₁₈ANA monolayer, which indicated a characteristic surface pressure鈥揳rea (蟺鈥?i>A) isotherm. A camphor disk transiently exhibited reciprocating motion at a higher surface density of C₁₈ANA. The amplitude of the reciprocating motion increased with an increase in the temperature of the aqueous phase below 290 K, but reciprocating motion varied to irregular motion over 290 K. The temperature-dependent reciprocating motion is discussed in terms of the 蟺鈥?i>A curve for C₁₈ANA depending on the temperature. The interaction between C₁₈ANA molecules was measured by Fourier transform IR spectrometry and Brewster-angle microscopy. As an extension of the study, the trajectory of reciprocating motion could be determined by writing with a camphor pen on the C₁₈ANA monolayer.