Enhanced Field Emission from Vertical ZnO Nanoneedles on Micropyramids

doi:10.1088/0256-307X/26/3/038101

Chin. Phys. Lett.

2009, Vol. 26

Issue (3): 038101 DOI: 10.1088/0256-307X/26/3/038101

CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY

Enhanced Field Emission from Vertical ZnO Nanoneedles on Micropyramids

ZHANG Yang, DIAO Da-Sheng

Institute for Physics of Microsystems and Department of Physics, Henan University, Kaifeng 475004

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ZHANG Yang, DIAO Da-Sheng 2009 Chin. Phys. Lett. 26 038101

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Abstract Vertical ZnO nanoneedles with sharp tips are secondarily grown on tips of primarily grown ZnO micropyramids by a vapour transport process. The field emission (FE) properties exhibit a lower turn-on electric field and a higher field enhancement factor as compared with vertical ZnO microrods. This result indicates that ZnO nanoneedles have good optimum shapes for FE due to electron accumulation at sharp tips.

Keywords: 81.05.Dz 79.70.+q 81.15.Gh

Received: 22 September 2008 Published: 19 February 2009

PACS:	81.05.Dz	(II-VI semiconductors)
	79.70.+q	(Field emission, ionization, evaporation, and desorption)
	81.15.Gh	(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))

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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/3/038101 OR https://cpl.iphy.ac.cn/Y2009/V26/I3/038101

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	ZHANG Yang
	DIAO Da-Sheng

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