Observation of Surface/Defect States of SnO2 Nanowires on Different Substrates from X-ray Excited Optical Luminescence

被引：35
|
作者：
Wang, Dongniu [1 ,3 ]
Yang, Jinli [3 ]
Li, Xifei [3 ]
Wang, Jiajun [3 ]
Li, Ruying [3 ]
Cai, Mei [2 ]
Sham, T. K. [1 ]
Sun, Xueliang [3 ]
机构：
[1] Univ Western Ontario, Dept Chem, London, ON N6A 3K7, Canada
[2] Gen Motors R&D Ctr, Warren, MI 48090 USA
[3] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 3K7, Canada
来源：
CRYSTAL GROWTH & DESIGN | 2012年 / 12卷 / 01期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
TIN OXIDE NANORODS; SOLUTION-PHASE; CARBON NANOTUBES; ROOM-TEMPERATURE; GROWTH; LITHIUM; FILMS; ELECTRODES; NANOPARTICLES; PROPERTY;
D O I：
10.1021/cg2011919
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
SnO2 nanowires (NWs) have been successfully synthesized on two different substrates (stainless steel (SS) and copper) via a facile hydrothermal process. SnO2 NWs with varying degrees of crystallinity are obtained on different substrates. The growth mechanisms are also deducted by observing the morphology revolution at various reaction times. Furthermore, the electronic structures and optical properties have been investigated by X-ray absorption near edge structure (XANES) and X-ray excited optical luminescence (XEOL) measurements. The yellow-green luminescence from SnO2 NWs is originated from the intrinsic surface states. Compared with SnO2 NWs on copper, a near infrared (NIR) luminescence is observed for SnO2 NWs on SS, which resulted from poor crystallinity and an abundance of defect/surface states.
引用
收藏
页码：397 / 402
页数：6
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