Enhanced field emission of ZnO nanowire arrays by the control of their structures

Abstract Four kinds of ZnO nanostructrues, i.e. nanorods, nanopencils, nanotowers, and nanoneedles, were successfully synthesized by chemical vapor deposition method, and their field emission properties were comparatively investigated. The results showed that field emission performance was strongly affected by nanowire morphology, and the nanotower-like ZnO exhibited the lowest turn-on field of 4.36 V/μm. The classical F-N theory was employed to analyze the enhancement mechanism. It was found that only the optimized combination of field enhancement factors and geometrical factors could assure excellent field emission performance.

[1]  Yazhou Wang,et al.  Regrowth of Template ZnO Nanowires for the Underlying Catalyst-Free Growth Mechanism , 2011 .

[2]  Jie Hu,et al.  Fabrication and field emission properties of ZnO/Al2O3 nanocomposite tetrapods , 2017 .

[3]  M. Henry,et al.  Length versus Radius Relationship for ZnO Nanowires Grown via Vapor Phase Transport , 2012 .

[4]  Sunaina,et al.  Investigation of the growth mechanism of the formation of ZnO nanorods by thermal decomposition of zinc acetate and their field emission properties , 2017 .

[5]  Zhen Li,et al.  Au nanoparticles decorated ZnO nanoarrays with enhanced electron field emission and optical absorption properties , 2015 .

[6]  Jian Shi,et al.  Evolution of Zinc Oxide Nanostructures through Kinetics Control. , 2011, Journal of materials chemistry.

[7]  Zhong Lin Wang,et al.  In Situ Field Emission of Density‐Controlled ZnO Nanowire Arrays , 2007 .

[8]  Q. Wan,et al.  Stable field emission from tetrapod-like ZnO nanostructures , 2004 .

[9]  G. Shen,et al.  Enhanced Field Emission Performance of ZnO Nanorods by Two Alternative Approaches , 2007 .

[10]  M. Rusop,et al.  A novel method for synthesis of well-aligned hexagonal cone-shaped ZnO nanostructures in field emission applications , 2014 .

[11]  Zhong Lin Wang,et al.  Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire Arrays , 2006, Science.

[12]  Dmitri Golberg,et al.  Inorganic semiconductor nanostructures and their field-emission applications , 2008 .

[13]  Q. Wan,et al.  Low-field electron emission from tetrapod-like ZnO nanostructures synthesized by rapid evaporation , 2003 .

[14]  Lu Li,et al.  Cl-Doped ZnO Nanowire Arrays on 3D Graphene Foam with Highly Efficient Field Emission and Photocatalytic Properties. , 2015, Small.