Ripple Texturing of Suspended Graphene Atomic Membranes

Details Ripple Texturing of Suspended Graphene Atomic Membranes Ripple Texturing of Suspended Graphene Atomic Membranes

2009-03-03

arxiv.org/abs/0903.0414v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 4 figures

Scientific paper

10.1038/nnano.2009.191

Graphene is the nature's thinnest elastic membrane, with exceptional mechanical and electrical properties. We report the direct observation and creation of one-dimensional (1D) and 2D periodic ripples in suspended graphene sheets, using spontaneously and thermally induced longitudinal strains on patterned substrates, with control over their orientations and wavelengths. We also provide the first measurement of graphene's thermal expansion coefficient, which is anomalously large and negative, ~ -7x10^-6 K^-1 at 300K. Our work enables novel strain-based engineering of graphene devices.

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