One nanometer thin carbon nanosheets with tunable conductivity and stiffness

Details One nanometer thin carbon nanosheets with tunable conductivity and stiffness One nanometer thin carbon nanosheets with tunable conductivity and stiffness

2011-05-29

arxiv.org/abs/1105.5791v1

Adv. Mater. 21 (2009) 1233-1237

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

36 pages, 14 figures

Scientific paper

10.1002/adma.200803078

We present a new route for the fabrication of ultrathin (~1 nm) carbon films and membranes, whose electrical behavior can be tuned from insulating to conducting. Self-assembled monolayers of biphenyls are cross-linked by electrons, detached from the surfaces and subsequently pyrolized. Above 1000K, the cross-linked aromatic monolayer forms a mechanically stable graphitic phase. The transition is accompanied by a drop of the sheet resistivity from ~10^8 to ~10^2 kOhm/sq and a mechanical stiffening of the nanomembranes from ~10 to ~50 GPa. The technical applicability of the nanosheets is demonstrated by incorporating them into a microscopic pressure sensor

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