Work

Optimization of Holographic Polymer-Dispersed Liquid Crystals Using Siloxane-containing Materials

Year: 2005

Type: article

Abstract: Optimization of performance of holographic gratings was investigated by changing the chemical structures of photopolymerizable monomers, the LC content, and recording beam intensity, which strongly related to the control of kinetics of polymerization and phase separation of LCs. High diffraction efficiency was obtained using 3-acryloxypropyltrimethoxysilane (APTMS) and 2-[(3,4-epoxycyclohexyl)ethyl]trimethoxysilane (ECTMS) as siloxane-containing reactive diluent by inducing a fast and good phase separation originated from the incompatible and flexible properties of siloxane chain even at a very low LC concentration (10~25wt%), in contrast to the case using diluent without siloxane component,like N-vinylpyrrolidinone. The phase-separated morphologies of gratings, such as spacing and surface topology, were observed by atomic force microscopy (AFM). Very regular and smooth morphologies were observed for the formed holographic gratings with APTMS and various amounts of LC.

Source: Institutional Repositories DataBase (IRDB)

Authors: Yeong Hee Cho, Nam Kim, Yusuke Kawakami

Institutions: Japan Advanced Institute of Science and Technology, Chungbuk National University

Language: English

Topic: Liquid Crystal Research Advancements

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W3213486762

FWCI:

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