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Template Deformation‐Tailored ZnO Nanorod/Nanowire Arrays: Full Growth Control and Optimization of Field‐Emission
Author(s) -
Zeng Haibo,
Xu Xijin,
Bando Yoshio,
Gautam Ujjal K.,
Zhai Tianyou,
Fang Xiaosheng,
Liu Baodan,
Golberg Dmitri
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200900714
Subject(s) - materials science , nanorod , nanowire , tapering , field electron emission , deformation (meteorology) , nanotechnology , current density , optoelectronics , cathode , electric field , radius , electrolyte , electrode , composite material , electron , chemistry , computer graphics (images) , physics , computer security , quantum mechanics , computer science
Here, a facile and effective route toward full control of vertical ZnO nanorod (NR)/nanowire (NW) arrays in centimeter‐scale areas and considerable improvement of field‐emission (FE) performance is reported. Controlled deformation of colloidal crystal monolayer templates is introduced by heating near glass‐transition temperature. The NR/NW density, uniformity, and tapering were all adjusted through selection of template size and deformation, and electrolyte composition. In line with the adjustments, the field‐emission performance of the arrays is significantly improved. A low turn‐on electric field of 1.8 V µm −1 , a field‐enhancement factor of up to 5 750, and an emitting current density of up to 2.5 mA cm −2 were obtained. These improved parameters would benefit their potential application in cold‐cathode‐based electronics.