An electrically switchable surface free energy on a liquid crystal and polymer composite film

Yi Hsin Lin, Ting Yu Chu, Yu Shih Tsou, Kai Han Chang, Ya Ping Chiu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

An electrically switchable surface free energy on a liquid crystal and polymer composite film (LCPCF) resulting from the orientations of liquid crystal molecules is investigated. By modification of Cassie's model and the measurement based on the Chibowski's film pressure model (E. Chibowski, Adv. Colloid Interface Sci. 103, 149 (2003)), the surface free energy of LCPCF is electrically switchable from 36 × 10-3J/m2 to 51 × 10-3 J / m2 while the average tilt angle of LC molecules changes from 0° to 32° with the applied pulsed voltage. The switchable surface free energy of LCPCF can help us to design biosensors and photonics devices, such as electro-optical switches, blood sensors, and sperm testers.

Original languageEnglish
Article number233502
JournalApplied Physics Letters
Volume101
Issue number23
DOIs
Publication statusPublished - 2012 Dec 3

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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