Controlled growth and field emission of vertically aligned AlN nanostructures with different morphologies
Liu Fei(刘飞)†, Su Zan-Jia(苏赞加), Liang Wei-Jie(梁炜杰), Mo Fu-Yao(莫富尧), Li Li(李力), Deng Shao-Zhi(邓少芝), Chen Jun(陈军), and Xu Ning-Sheng(许宁生)
Guangdong Province Key Laboratory of Display Material and Technology, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
Abstract The controllable growth of three different morphologies of AlN nanostructures (nanorod, nanotip and nanocrater) arrays are successfully realized by using chemical vapour deposition (CVD) technology. All three nanostructures are of single crystal h-AlN with a growth orientation of [001]. Their growth is attributed to the vapour-liquid-solid (VLS) mechanism. To investigate the factors affecting field emission (FE) properties of AlN nanostructures, we compare their FE behaviours in several aspects. Experimental results show that AlN nanocrater arrays possess the best FE properties, such as a threshold field of 7.2~V/μm and an emission current fluctuation lower than 4%. Moreover, the three AlN nanostructures all have good field emission properties compared with a number of other excellent cathode nanomaterials, which suggests that they are future promising FE nanomaterials.
Received: 13 February 2009
Revised: 23 February 2009
Accepted manuscript online:
PACS:
68.65.-k
(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
(Electronic transport in nanoscale materials and structures)
Fund: Project
supported by the National Basic Research Program of China (Grant No
2007CB935500), the National High Technology Research and Development
Program of China (Grant No 2007AA03Z305), the National Science
Foundation for Young Scientists of China (Grant
Cite this article:
Liu Fei(刘飞), Su Zan-Jia(苏赞加), Liang Wei-Jie(梁炜杰), Mo Fu-Yao(莫富尧), Li Li(李力), Deng Shao-Zhi(邓少芝), Chen Jun(陈军), and Xu Ning-Sheng(许宁生) Controlled growth and field emission of vertically aligned AlN nanostructures with different morphologies 2009 Chin. Phys. B 18 2016
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