Journal
ACS CENTRAL SCIENCE
Volume 2, Issue 12, Pages 904-909Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.6b00236
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Funding
- European Research Council under the European Union's Seventh Framework Programme (FP)/ERC [335879]
- Netherlands Organization for Scientific Research [NWO-VIDI 723.013.007, NWO-VENI 722.014.004]
- Swiss National Science Foundation [SNSF P300P2_154557]
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Transfer of large, clean, crack-and fold-free graphene sheets is a critical challenge in the field of graphene-based electronic devices. Polymers, conventionally used for transferring two-dimensional materials, irreversibly adsorb yielding a range of unwanted chemical functions and contaminations on the surface. An oil-water interface represents an ideal support for graphene. Cyclohexane, the oil phase, protects graphene from mechanical deformation and minimizes vibrations of the water surface. Remarkably, cyclohexane solidifies at 7 degrees C forming a plastic crystal phase molecularly conforming graphene, preventing the use of polymers, and thus drastically limiting contamination. Graphene floating at the cyclohexane/water interface exhibits improved electrical performances allowing for new possibilities of in situ, flexible sensor devices at a water interface.
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