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Baik, Jeong Min
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Directional Ostwald Ripening for Producing Aligned Arrays of Nanowires

Author(s)
Lee, Hye JinYang, U. LeongKim, Kyeong NamPark, SoojinKil, Kye HyoungKim, Jun SooWodtke, Alec M.Choi, Won JunKim, Myung HwaBaik, Jeong Min
Issued Date
2019-07
DOI
10.1021/acs.nanolett.9b00684
URI
https://scholarworks.unist.ac.kr/handle/201301/27231
Fulltext
https://pubs.acs.org/doi/10.1021/acs.nanolett.9b00684
Citation
NANO LETTERS, v.19, no.7, pp.4306 - 4313
Abstract
The remarkable electronic and mechanical properties of nanowires have great potential for fascinating applications; however, the difficulties of assembling ordered arrays of aligned nanowires over large areas prevent their integration into many practical devices. In this paper, we show that aligned VO2 nanowires form spontaneously after heating a thin V2O5 film on a grooved SiO2 surface. Nanowires grow after complete dewetting of the film, after which there is the formation of supercooled nanodroplets and subsequent Ostwald ripening and coalescence. We investigate the growth mechanism using molecular dynamics simulations of spherical Lennard-Jones particles, and the simulations help explain how the grooved surface produces aligned nanowires. Using this simple synthesis approach, we produce self-aligned, millimeter-long nanowire arrays with uniform metal-insulator transition properties; after their transfer to a polymer substrate, the nanowires act as a highly sensitive array of strain sensors with a very fast response time of several tens of milliseconds.
Publisher
AMER CHEMICAL SOC
ISSN
1530-6984
Keyword (Author)
VO2 nanowiresdirectional Ostwald ripeningself-alignedLennard-Jones potentialstrain sensors
Keyword
CHEMICAL-VAPOR-DEPOSITIONZNO NANOWIRESPHASE-TRANSITIONQUANTUM WIRESVO2 NANOBEAMGAS SENSORSSTRAINPRESSUREGROWTHTRANSPARENT

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