Please use this identifier to cite or link to this item: https://doi.org/10.1038/ncomms15919
Title: Engineering the thermal conductivity along an individual silicon nanowire by selective helium ion irradiation
Authors: Zhao Y. 
Liu D.
Chen J.
Zhu L.
Belianinov A.
Ovchinnikova O.S.
Unocic R.R.
Burch M.J.
Kim S.
Hao H. 
Pickard D.S. 
Li B.
Thong J.T.L. 
Keywords: helium
isotope
nanowire
silicon
silicon nanowire
unclassified drug
anion
engineering
helium
irradiation
nanotechnology
scattering
silicon
spatial resolution
thermal conductivity
Article
chemical engineering
crystallization
electron beam
heat tolerance
helium ion radiation
irradiation
molecular dynamics
phonon
physical parameters
quantitative analysis
radiation scattering
thermal conductivity
Issue Date: 2017
Publisher: Nature Publishing Group
Citation: Zhao Y., Liu D., Chen J., Zhu L., Belianinov A., Ovchinnikova O.S., Unocic R.R., Burch M.J., Kim S., Hao H., Pickard D.S., Li B., Thong J.T.L. (2017). Engineering the thermal conductivity along an individual silicon nanowire by selective helium ion irradiation. Nature Communications 8 : 15919. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms15919
Abstract: The ability to engineer the thermal conductivity of materials allows us to control the flow of heat and derive novel functionalities such as thermal rectification, thermal switching and thermal cloaking. While this could be achieved by making use of composites and metamaterials at bulk length-scales, engineering the thermal conductivity at micro- A nd nano-scale dimensions is considerably more challenging. In this work, we show that the local thermal conductivity along a single Si nanowire can be tuned to a desired value (between crystalline and amorphous limits) with high spatial resolution through selective helium ion irradiation with a well-controlled dose. The underlying mechanism is understood through molecular dynamics simulations and quantitative phonon-defect scattering rate analysis, where the behaviour of thermal conductivity with dose is attributed to the accumulation and agglomeration of scattering centres at lower doses. Beyond a threshold dose, a crystalline-amorphous transition was observed. © 2017 The Author(s).
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/174492
ISSN: 2041-1723
DOI: 10.1038/ncomms15919
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_1038_ncomms15919.pdf1.07 MBAdobe PDF

OPEN

NoneView/Download

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.