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Time-dependent mechanical-electrical coupled behavior in single crystal ZnO nanorods

Title
Time-dependent mechanical-electrical coupled behavior in single crystal ZnO nanorods
Author
장재일
Keywords
CURRENT-VOLTAGE CHARACTERISTICS; SILICON NANOWIRES; STRAIN SENSOR; ZINC-OXIDE; CREEP; NANOINDENTATION; PLASTICITY; CONTACTS
Issue Date
2015-05
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 5, Page. 9716-9722
Abstract
Nanoscale time-dependent mechanical-electrical coupled behavior of single crystal ZnO nanorods was systematically explored, which is essential for accessing the long-term reliability of the ZnO nanorod-based flexible devices. A series of compression creep tests combined with in-situ electrical measurement was performed on vertically-grown single crystal ZnO nanorods. Continuous measurement of the current (I)-voltage (V) curves before, during, after the creep tests revealed that I is non-negligibly increased as a result of the time-dependent deformation. Analysis of the I-V curves based on the thermionic emission-diffusion theory allowed extraction of nanorod resistance, which was shown to decrease as time-dependent deformation. Finally, based on the observations in this study, a simple analytical model for predicting the reduction in nanorod resistance as a function of creep strain that is induced from diffusional mechanisms is proposed, and this model was demonstrated to be in an excellent agreement with the experimental results.
URI
http://www.nature.com/articles/srep09716http://hdl.handle.net/20.500.11754/24644
ISSN
2045-2322
DOI
10.1038/srep09716
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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