具有强光致发光和场发射特性的喙状二氧化锡纳米棒。

Beaklike SnO2 nanorods with strong photoluminescent and field-emission properties.

作者信息

He Jr H, Wu Te H, Hsin Cheng L, Li Kun M, Chen Lih J, Chueh Yu L, Chou Li J, Wang Zhong L

机构信息

Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.

出版信息

Small. 2006 Jan;2(1):116-20. doi: 10.1002/smll.200500210.

DOI:10.1002/smll.200500210

PMID:17193566

Abstract

Beaklike SnO2 nanorods were synthesized by a vapor-liquid-solid approach using Au as a catalyst. The nanorods grow along the [10 1] direction and the beak is formed by switching the growth direction to [1 12] through controlling the growth conditions at the end of the synthesis. The photoluminescence (PL) spectrum of the nanorods exhibits visible light emission with a peak at 602 nm. The field-emission (FE) properties of the nanorods have been measured to exhibit a turn-on field of 5.8 V microm(-1). A comparative study of FE measurements between SnO2 nanorods with uniform diameters and these beaklike nanorods suggests that the shape and curved tips are important factors in determining the FE properties.

摘要

采用金作为催化剂，通过气-液-固方法合成了喙状二氧化锡纳米棒。纳米棒沿[10 1]方向生长，在合成末期通过控制生长条件将生长方向切换到[1 12]从而形成喙部。纳米棒的光致发光（PL）光谱显示出在602nm处有峰值的可见光发射。已测量纳米棒的场发射（FE）特性，其开启场为5.8 V·μm⁻¹。对直径均匀的二氧化锡纳米棒与这些喙状纳米棒的场发射测量进行的比较研究表明，形状和弯曲的尖端是决定场发射特性的重要因素。