Direct Fabrication of Zero- and one dimensional Metal Nanocrytals by thermally assisted electromigration
- Direct Fabrication of Zero- and one dimensional Metal Nanocrytals by thermally assisted electromigration
- 육종민; 김관표; 이종훈; M. Watanabe; A. Zettl; 김태환; 노영수; 최원국; 이종용
- direct fabrication; ZnO; metal nanodot; nanodots; nanowires; nanostructures; in situ nanofabrication; scanning probe; Joule heating; electromigration
- Issue Date
- ACS Nano
- VOL 4, NO 6, 2999-3004
- 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.
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