title: Improved photoluminescence and sensing stability of porous silicon nanowires by surface passivation.
abstract: Core-shell structured silicon nanowires (Si NWs) were obtained by coating Si NWs with an HfO2 layer. Enhanced photoluminescence (PL) and a slightly decreased PL lifetime are achieved by HfO2 coating. Furthermore, the sensing stability is strongly improved. The improvement of PL properties is interpreted in terms of surface passivation and the Purcell effect.
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. hphe@zju.edu.cn.
authors.forename: Lu
authors.initials: L
authors.lastname: Gan
authors.forename: Haiping
authors.initials: H
authors.lastname: He
authors.forename: Luwei
authors.initials: L
authors.lastname: Sun
authors.forename: Zhizhen
authors.initials: Z
authors.lastname: Ye