writer：Yuxia Luo, Jianfei Zhang, Aihua Sun, Chengyi Chu, Shi Zhou, Jianjun Guo, Tao Chen and Gaojie Xu
keywords：Electric Field Resposnive, colloid,
source：期刊
specific source：Journal of Materials Chemistry C, 2014, 2,1990-1994
Issue time：2014年
A new core-shell nano building block of SiO₂@TiO₂ using high refractive index materials of TiO2 to coat SiO2 colloidal NPs by one step approach was prepared. Through the self-assembly of SiO₂@TiO₂ core-shell NPs through applied electric field, a suspension of photonic crystals with close packed are formed in propylene carbonate. The reflectance spectrum of the SiO₂@TiO₂ suspension was investigated under a series of various electric fields. Our results showed that highly adjustable structure color change of the high-refractive index materials of SiO₂@TiO₂ suspension could be achieved not only by the control of TiO₂ shell thickness but also by the change of applied electric fiels.