Hard-templating of chiral TiO2 nanofibres with electron transition-based optical activity. Issue 5 (22nd October 2015)

• Record Type: Journal Article
• Authors: Wang, Cui; Liu, Shaohua; Duan, Yingying; Huang, Zhehao; Che, Shunai
• Is Part Of: Science and technology of advanced materials. Volume 16:Issue 5(2015)
• Publication Date: 2015-10-22
• Subjects: anatase -- hard-templating method -- electron transition-based optical activity -- circular dichroism; Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1088/1468-6996/16/5/054206
• Languages: English
• ISSNs: 1468-6996

Abstract

Abstract: The fabrication of optically active inorganic nanomaterials with chiral superstructures attracts attention because of their potential applications in chemical sensing and non-linear optics. Here, we present a facile way to prepare TiO2 nanofibres, in which the nanocrystals are helically arranged into a chiral superstructure. Notably, the chiral superstructure shows strong optical activity due to the difference of absorbing left- and right-handed circularly polarized light. This special optical activity resulted from electron transition from the valence band to the conduction band of TiO2 through a vicinal effect of helically arranged TiO2 nanocrystals.