Self-catalytic synthesis, structure and properties of ultra-fine luminescent ZnO nanostructures for field emission applications

被引：19
作者：
Gupta, Bipin Kumar [1 ]
Haranath, D. [1 ]
Chawla, S. [1 ]
Chander, H. [1 ]
Singh, V. N. [2 ]
Shanker, V. [1 ]
机构：
[1] Natl Phys Lab, CSIR, New Delhi 110012, India
[2] Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India
来源：
NANOTECHNOLOGY | 2010年 / 21卷 / 22期
关键词：
CARBON NANOTUBE; GROWTH-MECHANISM; NANOWIRE ARRAYS; PHOTOLUMINESCENCE; NANOBELTS; NANORODS; FILMS;
D O I：
10.1088/0957-4484/21/22/225709
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A facile method to produce high-quality ZnO nanostructures; either tetrapod (TP), nanotetraneedle (NTN) or multipod (MP) with a high degree of homogeneity for advanced field emission (FE) applications is presented. Among these nanostructures, NTN has been successfully employed to demonstrate enhanced current densities (2.6 mA cm(-2)), turn-on field (1.5 V mu m(-1)) and field-enhancement factors (6930) over conventional multiwalled carbon nanotubes (MWCNTs), TP, MP and ZnO-spheroids. A comparative study of FE from various ZnO nanostructures, morphologies and site densities has lead to the conclusion that diameter of the tip is one of the vital parameters in enhancing the overall FE properties.
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页数：8
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