Multiangular branched ZnS nanostructures with needle-shaped tips: Potential luminescent and field-emitter nanomaterial

被引：89

作者：

Fang, Xiaosheng ^{[1
]}

Gautam, Ujjal K. ^{[1
]}

Bando, Yoshio ^{[1
]}

Dierre, Benjamin ^{[2
]}

Sekiguchi, Takashi ^{[2
]}

Golberg, Dmitri ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Nanoscale Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

[2] Natl Inst Mat Sci, Adv Elect Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 12期

关键词：

D O I：

10.1021/jp711498m

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：

A facile and effective route toward the synthesis of ZnS multiangular branched nanostructures with needle-shaped tips has been developed. An average width of the structurally and chemically uniform, single-crystalline, defect-free tips was found to be less than 10 nm. Cathodoluminescence from individual ZnS multiangular branched nanostructures was investigated at high spatial resolution on the nanometer scale. The size-dependent optical spectra exhibit sharp ultraviolet band gap emission and broad visible emission. Field-emission measurements show a relatively low turn-on field of similar to 3.77 V/mu m at a current density of 10 mu A/cm(2) and the highest field enhancement factor beta of similar to 2182 ever reported for 1D ZnS nanostructures. This was attributed to the specific sharp tips and high aspect ratios. These unique nanostructures are envisaged to be highly promising for novel optoelectronic and field-emitting devices.

引用

页码：4735 / 4742

页数：8

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