"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 31
times in current journal articles indexed by Clarivate
during September-October 2009. Only three chemistry papers published in the
last two years, excluding review articles, collected higher citation totals
during that two-month period. Prior to the most recent bimonthly count,
citations to the paper have accrued as follows: July-August 2009: 23 citations
May-June 2009: 16
March-April 2009: 13
January-February 2009: 12
November-December 2008: 10
September-October 2008: 1
Total citations to date: 106
SOURCE:
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