Direct Fabrication of Zero- and one dimensional Metal Nanocrytals by thermally assisted electromigration

Title
Direct Fabrication of Zero- and one dimensional Metal Nanocrytals by thermally assisted electromigration
Authors
육종민김관표이종훈M. WatanabeA. Zettl김태환노영수최원국이종용
Keywords
direct fabrication; ZnO; metal nanodot; nanodots; nanowires; nanostructures; in situ nanofabrication; scanning probe; Joule heating; electromigration
Issue Date
2010-06
Publisher
ACS Nano
Citation
VOL 4, NO 6, 2999-3004
Abstract
Zero- and one-dimensional metal nanocrystals were successfully fabricated with accurate control in size, shape, and position on semiconductor surfaces by using a novel in situ fabrication method of the nanocrystal with a biasing tungsten tip in transmission electron microscopy. The dominant mechanism of nanocrystal formation was identified mainly as local Joule heating-assisted electromigration through the direct observation of formation and growth processes of the nanocrystal. This method was applied to extracting metal atoms with an exceedingly faster growth rate (~105 atoms/s) from a metal-oxide thin film to form a metal nanocrystal with any desired size and position. By real-time observation of the microstructure and concurrent electrical measurements, it was found that the nanostructure formation can be completely controlled into various shapes such as zero-dimensional nanodots and one-dimensional nanowires/nanorods.
URI
http://pubs.kist.re.kr/handle/201004/45577
ISSN
1936-0851
Appears in Collections:
KIST Publication > Article
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