Morphological appearances and photocontrollable coloration of dye-doped cholesteric liquid crystal/polymer coaxial microfibers fabricated by coaxial electrospinning technique

Jia De Lin, Che Pei Chen, Lin Jer Chen, Yu Chou Chuang, Shuan Yu Huang, Chia Rong Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This study systematically investigates the morphological appearance of azo-chiral dye-doped cholesteric liquid crystal (DDCLC)/polymer coaxial microfibers obtained through the coaxial electrospinning technique and examines, for the first time, their photocontrollable reflection characteristics. Experimental results show that the quasi-continuous electrospun microfibers can be successfully fabricated at a high polymer concentration of 17.5 wt% and an optimum ratio of 2 for the feeding rates of sheath to core materials at 25 °C and a high humidity of 50% ± 2% in the spinning chamber. Furthermore, the optical controllability of the reflective features for the electrospun fibers is studied in detail by changing the concentration of the azo-chiral dopant in the core material, the UV irradiation intensity, and the core diameter of the fibers. Relevant mechanisms are addressed to explain the optical-control behaviors of the DDCLC coaxial fibers. Considering the results, optically controllable DDCLC coaxial microfibers present potential applications in UV microsensors and wearable smart textiles or swabs.

Original languageEnglish
Pages (from-to)3112-3126
Number of pages15
JournalOptics Express
Volume24
Issue number3
DOIs
Publication statusPublished - 2016 Feb 8

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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