Effect of surface modification of SiO2@TiO2 core–shell particles on the structural colour under an electric field,10.1039/C4RA12502A

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Effect of surface modification of SiO2@TiO2 core–shell particles on the structural colour under an electric field

Xuanxuan Qiao,Yuxia Luo,Aihua Sun,Chongyang Wang,Jianfei Zhang,Chengyi Chu,Jianjun Guo,Gaojie Xu

RSC Advances Pub Date : 12/17/2014 00:00:00 , DOI:10.1039/C4RA12502A

Abstract

Surface modified colloidal SiO₂@TiO₂ core–shell particles were chosen to study their responsive photonic properties and the effect of surface on structural colour under low electric field. The surface of SiO₂@TiO₂ core–shell particles was controllably coated by PDDA, PVA and SiO₂. A corresponding colloidal suspension of the modified SiO₂@TiO₂ showed completely different reflection spectra. The dielectric spectrum was employed to explain the effect of surface properties on the assembly.