TY - JOUR
T1 - Counting molecular-beam grown graphene layers
AU - Plaut, Annette S.
AU - Wurstbauer, Ulrich
AU - Pinczuk, Aron
AU - Garcia, Jorge M.
AU - Pfeiffer, Loren N.
PY - 2013/6/17
Y1 - 2013/6/17
N2 - We have used the ratio of the integrated intensity of graphene's Raman G peak to that of the silicon substrate's first-order optical phonon peak, accurately to determine the number of graphene layers across our molecular-beam (MB) grown graphene films. We find that these results agree well both, with those from our own exfoliated single and few-layer graphene flakes, and with the results of Koh [ACS Nano 5, 269 (2011)]. We hence distinguish regions of single-, bi-, tri-, four-layer, etc., graphene, consecutively, as we scan coarsely across our MB-grown graphene. This is the first, but crucial, step to being able to grow, by such molecular-beam-techniques, a specified number of large-area graphene layers, to order.
AB - We have used the ratio of the integrated intensity of graphene's Raman G peak to that of the silicon substrate's first-order optical phonon peak, accurately to determine the number of graphene layers across our molecular-beam (MB) grown graphene films. We find that these results agree well both, with those from our own exfoliated single and few-layer graphene flakes, and with the results of Koh [ACS Nano 5, 269 (2011)]. We hence distinguish regions of single-, bi-, tri-, four-layer, etc., graphene, consecutively, as we scan coarsely across our MB-grown graphene. This is the first, but crucial, step to being able to grow, by such molecular-beam-techniques, a specified number of large-area graphene layers, to order.
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U2 - 10.1063/1.4811708
DO - 10.1063/1.4811708
M3 - Article
AN - SCOPUS:84879823110
SN - 0003-6951
VL - 102
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 24
M1 - 241905
ER -