[JMCA] Electric Field Induced Structural Color Changes of SiO2@TiO2 Core-Shell Colloidal Suspensions
作者：Yuxia Luo, Jianfei Zhang, Aihua Sun, Chengyi Chu, Shi Zhou, Jianjun Guo, Tao Chen and Gaojie Xu
關鍵字：Electric Field Resposnive, colloid,
論文來源：期刊
具體來源：Journal of Materials Chemistry C, 2014, 2,1990-1994
發表時間：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.