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Thermally induced dynamics of dislocations in graphene at atomic resolution
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Gong, Chuncheng, Robertson, Alex W., He, Kuang, Lee, Gun-Do, Yoon, Euijoon, Allen, Christopher S., Kirkland, Angus I. and Warner, Jamie H. (2015) Thermally induced dynamics of dislocations in graphene at atomic resolution. ACS Nano, 9 (10). pp. 10066-10075. doi:10.1021/acsnano.5b05355 ISSN 1936-0851.
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Official URL: http://dx.doi.org/10.1021/acsnano.5b05355
Abstract
Thermally induced dislocation movements are important in understanding the effects of high temperature annealing on modifying the crystal structure. We use an in situ heating holder in an aberration corrected transmission electron microscopy to study the movement of dislocations in suspended monolayer graphene up to 800 °C. Control of temperature enables the differentiation of electron beam induced effects and thermally driven processes. At room temperature, the dynamics of dislocation behavior is driven by the electron beam irradiation at 80 kV; however at higher temperatures, increased movement of the dislocation is observed and provides evidence for the influence of thermal energy to the system. An analysis of the dislocation movement shows both climb and glide processes, including new complex pathways for migration and large nanoscale rapid jumps between fixed positions in the lattice. The improved understanding of the high temperature dislocation movement provides insights into annealing processes in graphene and the behavior of defects with increased heat.
Item Type: | Journal Article | ||||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Journal or Publication Title: | ACS Nano | ||||||||||
Publisher: | American Chemical Society | ||||||||||
ISSN: | 1936-0851 | ||||||||||
Official Date: | 27 October 2015 | ||||||||||
Dates: |
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Volume: | 9 | ||||||||||
Number: | 10 | ||||||||||
Page Range: | pp. 10066-10075 | ||||||||||
DOI: | 10.1021/acsnano.5b05355 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Copyright Holders: | American Chemical Society | ||||||||||
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