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dc.contributor.authorRan, Guang
dc.contributor.author冉广
dc.contributor.authorLiu, Xiang
dc.contributor.authorWu, Jihong
dc.contributor.authorZu, Xiaotao
dc.contributor.authorWang, Lumin
dc.date.accessioned2013-04-02T09:44:48Z
dc.date.available2013-04-02T09:44:48Z
dc.date.issued2012-05-15
dc.identifier.citationAPPLIED SURFACE SCIENCE,2012,258(15):5553-5557zh_CN
dc.identifier.issn0169-4332
dc.identifier.urihttp://dx.doi.org/10.1016/j.apsusc.2012.01.073
dc.identifier.uriWOS:000302135700005
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/15457
dc.description.abstractThe effect of surface roughness on the morphological evolution of polycrystalline tungsten during bombardment by focused ion beam has been investigated. The nanoneedles were self-assembled on the mechanically polished tungsten surface with high roughness (Rz = 8.9 nm). In contrast, a specific surface without nanoneedles was formed on the electrochemically polished tungsten surface with low roughness (Rz = 1.4 nm) although all bombardment parameters except for surface roughness were the same. The concave-convex surface morphology significantly influences nanoneedle formation due to its effect on the dynamic competition between the roughening and smoothing process. This discovery shows the importance of original surface roughness in controlling the morphological evolution of tungsten during ion irradiation and suggests a means for fabricating tungsten nanoneedles that might be used in quantum, photon and electron devices. (C) 2012 Elsevier B.V. All rights reserved.zh_CN
dc.description.sponsorshipSouthwest Institute of Physics of China [XDHT2011060A]; Fundamental Research Funds for the Central Universities, China [2011121022]zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCIENCE BVzh_CN
dc.subjectTungstenzh_CN
dc.subjectNanostructurezh_CN
dc.subjectFocused ion beamzh_CN
dc.subjectSelf-organizationzh_CN
dc.subjectSurface roughnesszh_CN
dc.titleThe effect of surface roughness on self-assembly tungsten nanoneedles induced by focused Ga+ ion beam bombardmentzh_CN
dc.typeArticlezh_CN


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