[21p-P10-1~5] 3.1 Basic optics and frontier of optics (merged with formerly 3.2 Equipment optics and materials)

[21p-P10-1] In-situ Video-recording of Azo-polymer Deformation Process using High-speed Atomic Force Microscopy

〇Keishi Yang¹, Feng-Yueh Chan², Hiroki Watanabe², Prabhat Verma¹, Yasushi Inouye^1,3, Takayuki Uchihashi², Hidekazu Ishitobi^1,3, Takayuki Umakoshi¹ (1.Graduate School of Engineering, Osaka Univ., 2.Graduate School of Science, Nagoya Univ., 3.Graduate School of Frontier Bioscience, Osaka Univ.)

Keywords:

Azo-polymer,High-speed atomic force microscopy,Atomic force microscopy

Azo-polymer thin films which contain azo-benzene make topography deformation on surface when laser light irradiate, but the mechanism still not revealed clearly. In this study, we successfully achieved in-situ observation of the surface deformations by focusing laser light onto a specific spot on the azo-polymer thin film and observing it with high-speed atomic force microscopy (HS-AFM). To enable the observation of the focused spot on the azopolymer thin film using an inverted optical microscope, we employed a tip-scan HS-AFM. We analyzed the temporal changes of the surface topography in detail through height line profiles. Furthermore, we confirmed that different surface topographies were formed depending on the polarization direction of the incident light. Conducting in-situ observations of the surface topography deformation process under various conditions can contribute to further elucidating the deformation mechanisms.