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Soft-solution route to ZnO nanowall array with low threshold power density

Title
Soft-solution route to ZnO nanowall array with low threshold power density
Authors
Jang E.-S.Chen X.Won J.-H.Chung J.-H.Jang D.-J.Kim Y.-W.Choy J.-H.
Ewha Authors
최진호
SCOPUS Author ID
최진호scopus
Issue Date
2010
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
vol. 97, no. 4
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
ZnO nanowall array (ZNWA) has been directionally grown on the buffer layer of ZnO nanoparticles dip-coated on Si-wafer under a soft solution process. Nanowalls on substrate are in most suitable shape and orientation not only as an optical trap but also as an optical waveguide due to their unique growth habit, V [011̄0]≫ V [0001]≈V [0001̄]. Consequently, the stimulated emission at 384 nm through nanowalls is generated by the threshold power density of only 25 kW/ cm 2. Such UV lasing properties are superior to those of previously reported ZnO nanorod arrays. Moreover, there is no green (defect) emission due to the mild procedure to synthesize ZNWA. © 2010 American Institute of Physics.
DOI
10.1063/1.3466910
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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