source from：

Ji-Liang Zhu, Shui-Bin Ni, Chao Ping Chen, Xiao-Long Song, Chao-Yuan Chen, Jian-Gang Lu, and Yikai Su, ”The Influence of Polymer System on Polymer-Stabilized Blue Phase Liquid Crystals,” Liq. Crys., 41(6), 891-896, 2014