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Modulating ZnO nanostructure arrays on any substrates by nanolevel structure control

Title
Modulating ZnO nanostructure arrays on any substrates by nanolevel structure control
Authors
Ye B.-U.Yu H.K.Kim M.H.Lee J.-L.Baik J.M.
Ewha Authors
김명화
SCOPUS Author ID
김명화scopus
Issue Date
2011
Journal Title
Journal of Physical Chemistry C
ISSN
1932-7447JCR Link
Citation
vol. 115, no. 16, pp. 7987 - 7992
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A uniform high-aspect-ratio nanotextured surface with a very dense forest of vertically aligned nanowires that was produced by surface chemical postfabrication of ZnO was induced by a structural transformation at the nanolevel. X-ray photoelectron spectroscopy verified the formation of the heterogeneous surface structures (GaOx on GaN and AuOx on Au) at the nanolevel as well as the modification of surface stoichiometry by UV/ozone treatment. The structural transformation contributes to generating a surface charge, acting as nucleation sites for nanotip growth. This led to a significant increase in density and improvement in diameter of the nanotips for various substrates, such as ZnO, Au, GaN, and graphene. However, the surface oxygen by O2 plasma treatment reduced the activity as activation sites of the exposed surface, resulting in the decrease of the density of the nanotips. This rational engineering of substrates by a structural transformation at the nanolevel may provide a promising method for producing highly dense one-dimensional nanomaterials. © 2011 American Chemical Society.
DOI
10.1021/jp201042t
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자연과학대학 > 화학·나노과학전공 > Journal papers
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