"Measurement of the elastic properties and intrinsic strength of
monolayer graphene," by Changgu Lee, Xiaoding Wei, Jeffrey W.
Kysar, and James Hone, Science, 321(5887): 385-8, 18 July 2008.
[Authors' affiliation: Columbia University, New York, NY]
Abstract: "We measured the elastic properties and
intrinsic breaking strength of free-standing monolayer graphene membranes
by nanoindentation in an atomic force microscope. The force-displacement
behavior is interpreted within a framework of nonlinear elastic
stress-strain response, and yields second- and third-order elastic
stiffnesses of 340 newtons per meter (N m(-1)) and -690 N m(-1),
respectively. The breaking strength is 42 N m(-1) and represents the
intrinsic strength of a defect-free sheet. These quantities correspond to a
Young's modulus of E = 1.0 terapascals, third-order elastic stiffness of D
= -2.0 terapascals, and intrinsic strength of sigma(int) = 130 gigapascals
for bulk graphite. These experiments establish graphene as the strongest
material ever measured, and show that atomically perfect nanoscale
materials can be mechanically tested to deformations well beyond the linear
regime."
This 2008 report from Science was cited 36
times in current journal articles indexed by Clarivate
during January-February 2010. Thanks to this latest two-month tally, the
report currently ranks as the third-most-cited chemistry paper published in
the last two years, aside from reviews. Prior to the most recent bimonthly
count, citations to the paper have accrued as follows:
SOURCE:
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