Hierarchical SnO2 Nanostructures: Linear Assembly of Nanorods on the Nanowire Backbones

被引：37

作者：

Li, Hongxing ^{[1
]}

Ma, Haiqing ^{[1
]}

Zeng, Yaping ^{[1
]}

Pan, Anlian ^{[1
]}

Zhang, Qinglin ^{[1
]}

Yu, Hongchun ^{[1
]}

Wang, Taihong ^{[1
]}

Wang, Yanguo ^{[1
,2
]}

Zou, Bingsuo ^{[1
]}

机构：

[1] Hunan Univ, Key Lab Micronano Optoelet Devices MOC, Micronano Technol Res Ctr, Changsha 410082, Hunan, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 04期

关键词：

THERMAL EVAPORATION; BRANCH GROWTH; NANORIBBONS; ARRAYS;

D O I：

10.1021/jp911514t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single-crystalline SnO2 nanorods were successfully assembled on SnO2 nanowire backbones through a sequential gold-catalyzed thermal evaporation method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies showed that uniform secondary nanorod branches were epitaxially grown from two side surfaces of the nanowire backbones. These branch rods are parallel to each other with 2-fold symmetry with respect to the backbones. The crystal structure of these as-prepared SnO2 centipede-like nanostructures was identified to coincide to the normal rutile structure. The photoluminescence (PL) properties of single centipede-like SnO2 structures were studied by confocal microscopy, which showed that these structures can act as good optical waveguides. Cathodoluminescence (CL) spectra of the SnO2 branched structures obtained in the SEM-CL system featured a blue emission band around 462 nm that is attributed to a defect-state-related emission.

引用

页码：1844 / 1848

页数：5

共 37 条

[1] SPECTROSCOPIC PROPERTIES OF SEMICONDUCTOR CRYSTALS WITH DIRECT FORBIDDEN ENERGY-GAP [J].