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Plateau-Rayleigh crystal growth of periodic shells on one-dimensional substrates

Authors
Day, Robert W.Mankin, Max N.Gao, RuixuanNo, You-ShinKim, Sun-KyungBell, David C.Park, Hong-GyuLieber, Charles M.
Issue Date
4월-2015
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE NANOTECHNOLOGY, v.10, no.4, pp.345 - 352
Indexed
SCIE
SCOPUS
Journal Title
NATURE NANOTECHNOLOGY
Volume
10
Number
4
Start Page
345
End Page
352
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/93983
DOI
10.1038/NNANO.2015
ISSN
1748-3387
Abstract
The Plateau-Rayleigh instability was first proposed in the mid-1800s to describe how a column of water breaks apart into droplets to lower its surface tension. This instability was later generalized to account for the constant volume rearrangement of various one-dimensional liquid and solid materials. Here, we report a growth phenomenon that is unique to one-dimensional materials and exploits the underlying physics of the Plateau-Rayleigh instability. We term the phenomenon Plateau-Rayleigh crystal growth and demonstrate that it can be used to grow periodic shells on one-dimensional substrates. Specifically, we show that for certain conditions, depositing Si onto uniform-diameter Si cores, Ge onto Ge cores and Ge onto Si cores can generate diameter-modulated core-shell nanowires. Rational control of deposition conditions enables tuning of distinct morphological features, including diameter-modulation periodicity and amplitude and cross-sectional anisotropy. Our results suggest that surface energy reductions drive the formation of periodic shells, and that variation in kinetic terms and crystal facet energetics provide the means for tunability.
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