Plasma-enabled growth of single-crystalline SiC/AlSiC core-shell nanowires on porous alumina templates

Fang, J; Aharonovich, I; Levchenko, I; Ostrikov, K; Spizzirri, PG; Rubanov, S; Prawer, S

Plasma-enabled growth of single-crystalline SiC/AlSiC core-shell nanowires on porous alumina templates

Fang, J

Aharonovich, I

Levchenko, I Ostrikov, K Spizzirri, PG Rubanov, S Prawer, S

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Publication Type:: Journal Article
Citation:: Crystal Growth and Design, 2012, 12 (6), pp. 2917 - 2922
Issue Date:: 2012-06-06

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Field	Value	Language
dc.contributor.author	Fang, J https://orcid.org/0000-0002-2214-2902	en_US
dc.contributor.author	Aharonovich, I https://orcid.org/0000-0003-4304-3935	en_US
dc.contributor.author	Levchenko, I	en_US
dc.contributor.author	Ostrikov, K	en_US
dc.contributor.author	Spizzirri, PG	en_US
dc.contributor.author	Rubanov, S	en_US
dc.contributor.author	Prawer, S	en_US
dc.date.issued	2012-06-06	en_US
dc.identifier.citation	Crystal Growth and Design, 2012, 12 (6), pp. 2917 - 2922	en_US
dc.identifier.issn	1528-7483	en_US
dc.identifier.uri	http://hdl.handle.net/10453/28849
dc.description.abstract	We report the catalyst-free synthesis of the arrays of core-shell, ultrathin, size-uniform SiC/AlSiC nanowires on the top of a periodic anodic aluminum oxide template. The nanowires were grown using an environmentally friendly, silane-free process by exposing the silicon supported porous alumina template to CH 4 + H 2 plasmas. High-resolution scanning and transmission electron microscopy studies revealed that the nanowires have a single-crystalline core with a diameter of about 10 nm and a thin (1-2 nm) amorphous AlSiC shell. Because of their remarkable length, high aspect ratio, and very high surface area-to-volume ratio, these unique structures are promising for nanoelectronic and nanophotonic applications that require efficient electron emission, light scattering, etc. A mechanism for nanowire growth is proposed based upon the reduction of the alumina template to nanosized metallic aluminum droplets forming between nanopores. The subsequent incorporation of silicon and carbon atoms from the plasma leads to nucleation and growth from the top of the alumina template. © 2012 American Chemical Society.	en_US
dc.relation.ispartof	Crystal Growth and Design	en_US
dc.relation.isbasedon	10.1021/cg300103a	en_US
dc.subject.classification	Inorganic & Nuclear Chemistry	en_US
dc.title	Plasma-enabled growth of single-crystalline SiC/AlSiC core-shell nanowires on porous alumina templates	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	12	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0302 Inorganic Chemistry	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	12	en_US

Abstract:

We report the catalyst-free synthesis of the arrays of core-shell, ultrathin, size-uniform SiC/AlSiC nanowires on the top of a periodic anodic aluminum oxide template. The nanowires were grown using an environmentally friendly, silane-free process by exposing the silicon supported porous alumina template to CH 4 + H 2 plasmas. High-resolution scanning and transmission electron microscopy studies revealed that the nanowires have a single-crystalline core with a diameter of about 10 nm and a thin (1-2 nm) amorphous AlSiC shell. Because of their remarkable length, high aspect ratio, and very high surface area-to-volume ratio, these unique structures are promising for nanoelectronic and nanophotonic applications that require efficient electron emission, light scattering, etc. A mechanism for nanowire growth is proposed based upon the reduction of the alumina template to nanosized metallic aluminum droplets forming between nanopores. The subsequent incorporation of silicon and carbon atoms from the plasma leads to nucleation and growth from the top of the alumina template. © 2012 American Chemical Society.

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http://hdl.handle.net/10453/28849