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Author

Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

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Direct Fabrication of Zero- and One-Dimensional Metal Nanocrystals by Thermally Assisted Electromigration

Cited 5 times inthomson ciCited 5 times inthomson ci
Title
Direct Fabrication of Zero- and One-Dimensional Metal Nanocrystals by Thermally Assisted Electromigration
Author
Yuk, Jong MinKim, KwanpyoLee, ZonghoonWatanabe, MasashiZettl, A.Kim, Tae WhanNo, Young SooChoi, Won KookLee, Jeong Yong
Keywords
Electromigration; In situ nanofabrication; In situ transmission electron microscopy; Joule heating; Metal; Nanodots; Nanorods; Nanostructures; Nanowires; Scanning probe
Issue Date
201006
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.4, no.6, pp.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
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DOI
http://dx.doi.org/10.1021/nn901674p
ISSN
1936-0851
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MSE_Journal Papers

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