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Ambient effects on electric-field-induced local charge modification of TiO 2

Title
Ambient effects on electric-field-induced local charge modification of TiO 2
Authors
Kim H.Hong S.Kim D.-W.
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2012
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
Applied Physics Letters vol. 100, no. 2
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We investigated the surface potential of TiO 2 single crystals using scanning probe microscopy (SPM) under different gas environment. The SPM tip-induced electrical stress resulted in reversal in the surface potential, V surf, polarity only in H 2/Ar (ΔV surf 0.30 eV) and not in Ar and O 2. Quantitative measurement of the influence of ambient gas on the surface potential led us to develop a model where the adsorbed oxygen molecules and oxygen vacancies interact to change their relative concentration leading to different surface potential in TiO 2. These results will give us insights into ambient-dependent physical phenomena in oxide thin film nanostructures. © 2012 American Institute of Physics.
DOI
10.1063/1.3675630
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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