簇状CdSiO3纳米线阵列的自催化合成及光致发光特性

Self-catalytic synthesis and photoluminescence property of cluster-like CdSiO3 nanowire arrays.

作者信息

Shi Jianfeng, Jiang Yang, Li Guohua, Wang Chun, Li Nan

机构信息

School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui, 230009, PR China.

出版信息

J Nanosci Nanotechnol. 2008 Nov;8(11):5825-30. doi: 10.1166/jnn.2008.253.

DOI:10.1166/jnn.2008.253

PMID:19198312

Abstract

Cluster-like cadmium silicate (CdSiO3) nanowire arrays on Si substrate have been synthesized via a self-catalytic growth using a modified vapor-phase evaporation method. XRD and HRTEM analyses indicated that the CdSiO3 nanowire had a monoclinic single-crystal structure. The growth mechanism of the cluster-like nanowire array is proposed as vapor-liquid-solid mechanism, in which lower melting point Cd serves as the catalyst. The PL measurements revealed the strong photoluminescence peaks in the purple region of 358-476 nm due to the self-activated luminescence, which was different from those of CdSiO3 bulk powder.

摘要

通过使用改进的气相蒸发法进行自催化生长，在硅衬底上合成了簇状硅酸镉（CdSiO3）纳米线阵列。X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）分析表明，CdSiO3纳米线具有单斜单晶结构。提出簇状纳米线阵列的生长机制为气-液-固机制，其中低熔点的镉作为催化剂。光致发光（PL）测量显示，由于自激活发光，在358-476nm的紫色区域有很强的光致发光峰，这与CdSiO3体粉末的光致发光峰不同。