1. Single-crystal SnO(2) nanoshuttles: shape-controlled synthesis, perfect flexibility and high-performance field emission
- Author
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Aizi Jin, Xiaoxiang Xia, Shibing Tian, Meimei Chen, Junjie Li, and Changzhi Gu
- Subjects
Nanostructure ,Materials science ,business.industry ,Mechanical Engineering ,Nanowire ,Bioengineering ,Nanotechnology ,General Chemistry ,Carbon nanotube ,Chemical vapor deposition ,law.invention ,Field electron emission ,Mechanics of Materials ,law ,Electric field ,Optoelectronics ,General Materials Science ,Electrical and Electronic Engineering ,business ,Current density ,Single crystal - Abstract
Vertically aligned single-crystal SnO(2) nanoshuttle arrays with uniform morphology and a relatively high aspect ratio were synthesized by a simple hot-wall chemical vapor deposition (CVD) method. It was found that regulating the growth temperature gradient could change the shape of the SnO(2) nanostructure from nanoshuttles to nanochisels and nanoneedles, and a self-catalyzing growth process was responsible for tunable morphologies of SnO(2) nanostructures. The as-synthesized SnO(2) nanoshuttles showed ultrahigh flexibility and strong toughness with a large elastic strain of ∼ 6.2, which is much higher than reported for Si and ZnO nanowire as well as most crystalline metallic materials. The field emitter fabricated using SnO(2) nanoshuttle arrays has a low turn-on electric field of around 0.6 V µm(-1), and a high field emission current density of above 10 mA cm(-2), which is comparable with the highest emission current density of carbon nanotube and nanowire field emitters.
- Published
- 2011