Browsing by Author "Shen, Cheng-Yu"

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Characteristics of Electrically Switchable Wettability Surfaces of Liquid Crystal and Polymer Composite Films
(2010)
Chiu, Ya-Ping
;
Shen, Cheng-Yu
;
Lin, Yi-Hsin
;
光電工程學系
;
Department of Photonics
Experimentally, the electrically controllable surface wettability of liquid crystal and polymer composite film has been demonstrated. In the work, scanning probe microscopy has been used to investigate the surface characterization of liquid crystal molecular units at a polymer surface under external voltages applied. The surface morphologies as well as the sensitivity of measurement to surface adhesive force on the nanoscale are determined quantitatively for such unique nano-sized liquid crystals/polymer composite films. The surface wettability of the films deduced from the local adhesion properties demonstrated the electrical control of surface wettability properties, suggesting that the interfacial liquid-crystal molecular alignment of the films with external voltage applied should have significant influence on the modification of the surface characterization of liquid crystals. (C) 2010 The Japan Society of Applied Physics
Electrically surface-driven switchable wettability of liquid crystal/polymer composite film
(2010-03-29)
Chiu, Ya-Ping
;
Shen, Cheng-Yu
;
Wang, Wen-Ching
;
Chu, Ting-Yu
;
Lin, Yi-Hsin
This study demonstrates the electrical control of the surface wettability of liquid crystal and polymer composite film. The application of external voltages significantly affects the surface wettability of the film. This study uses atomic force microscopy to quantitatively characterize the fundamental mechanism responsible for the structurally driven changes in surface properties at various applied voltages. The surface wettability transitions of the film are electrically driven, as shown by reorganized liquid crystal molecules. Measurements of the voltage-dependent surface wettability of the composite film suggest approaches to supporting control applications of future electro-optical nanotechnology devices.