TiO2 Nanotip Arrays: Anodic Fabrication and Field-Emission Properties

doi:10.1021/am301690f

CORC > 北京大学 > 信息科学技术学院

	TiO2 Nanotip Arrays: Anodic Fabrication and Field-Emission Properties
	Liang, Jia ; Zhang, Gengmin
刊名	acs applied materials interfaces
	2012
关键词	TiO2 nanotip field emission anodization X-ray photoelectron spectrum annealing THIN-FILMS NEUTRON-DIFFRACTION NANOTUBES ANATASE TITANIUM RAMAN TEMPERATURE RUTILE OXIDE PHOTOLUMINESCENCE
DOI	10.1021/am301690f
英文摘要	In contrast to the main-stream strategy of growing convex nanostructures upward from the substrates and using them as cold electron sources, it is illustrated in this article that growing concave nanostructures downward into substrates also results in configurations suitable for field emission. Well-ordered TiO2 nanotube arrays were developed on the titanium foils in two-step anodizations. Simultaneously, arrays of sharp nanotips, which resembled the Spindt emitter arrays in appearance, also manifested themselves on the outmost surface of the foils. These nanotips were actually the remainder of the titanium foil surfaces that survived dissolution during anodization. Annealing transformed the amorphous TiO2 nanotips into anatase crystals and further to rutile. Despite the lack of an overall large aspect ratio, the sharpness of these nanotips guaranteed sufficiently strong electric fields for electron extraction. As a result, field emission was readily obtained from the TiO2 nanotip arrays, either before or after annealing. Photoelectron spectroscopy of the samples demonstrated that the majority of the emitted electrons came from local states in the band gap. Annealing at an appropriate temperature increased these local states and improved the field-emission capability of the samples.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000311521900045&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; PubMed; 20; ARTICLE; 11; 6053-6061; 4
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/190737]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Liang, Jia,Zhang, Gengmin. TiO2 Nanotip Arrays: Anodic Fabrication and Field-Emission Properties[J]. acs applied materials interfaces,2012.
APA	Liang, Jia,&Zhang, Gengmin.(2012).TiO2 Nanotip Arrays: Anodic Fabrication and Field-Emission Properties.acs applied materials interfaces.
MLA	Liang, Jia,et al."TiO2 Nanotip Arrays: Anodic Fabrication and Field-Emission Properties".acs applied materials interfaces (2012).