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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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Structurally driven one-dimensional electron confinement in sub-5-nm graphene nanowrinkles

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Title
Structurally driven one-dimensional electron confinement in sub-5-nm graphene nanowrinkles
Author
Lim, HyunseobJung, JaehoonRuoff, Rodney S.Kim, Yousoo
Issue Date
2015-10
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.6, pp.8601
Abstract
Graphene-based carbon materials such as fullerenes, carbon nanotubes, and graphenes have distinct and unique electronic properties that depend on their dimensionality and geometric structures. Graphene wrinkles with pseudo one-dimensional structures have been observed in a graphene sheet. However, their one-dimensional electronic properties have never been observed because of their large widths. Here we report the unique electronic structure of graphene nanowrinkles in a graphene sheet grown on Ni(111), the width of which was small enough to cause one-dimensional electron confinement. Use of spatially resolved, scanning tunnelling spectroscopy revealed bandgap opening and a one-dimensional van Hove singularity in the graphene nanowrinkles, as well as the chemical potential distribution across the graphene nanowrinkles. This observation allows us to realize a metallic-semiconducting-metallic junction in a single graphene sheet. Our demonstration of one-dimensional electron confinement in graphene provides the novel possibility of controlling its electronic properties not by chemical modification but by 'mechanical structuring'.
URI
https://scholarworks.unist.ac.kr/handle/201301/17869
URL
http://www.nature.com/ncomms/2015/151023/ncomms9601/full/ncomms9601.html
DOI
10.1038/ncomms9601
ISSN
2041-1723
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PHY_Journal Papers
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