Merck

Direct transfer of graphene onto flexible substrates.

Proceedings of the National Academy of Sciences of the United States of America (2013-10-16)
Luiz G P Martins, Yi Song, Tingying Zeng, Mildred S Dresselhaus, Jing Kong, Paulo T Araujo
ABSTRACT

In this paper we explore the direct transfer via lamination of chemical vapor deposition graphene onto different flexible substrates. The transfer method investigated here is fast, simple, and does not require an intermediate transfer membrane, such as polymethylmethacrylate, which needs to be removed afterward. Various substrates of general interest in research and industry were studied in this work, including polytetrafluoroethylene filter membranes, PVC, cellulose nitrate/cellulose acetate filter membranes, polycarbonate, paraffin, polyethylene terephthalate, paper, and cloth. By comparing the properties of these substrates, two critical factors to ensure a successful transfer on bare substrates were identified: the substrate's hydrophobicity and good contact between the substrate and graphene. For substrates that do not satisfy those requirements, polymethylmethacrylate can be used as a surface modifier or glue to ensure successful transfer. Our results can be applied to facilitate current processes and open up directions for applications of chemical vapor deposition graphene on flexible substrates. A broad range of applications can be envisioned, including fabrication of graphene devices for opto/organic electronics, graphene membranes for gas/liquid separation, and ubiquitous electronics with graphene.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Poly(vinyl chloride), average Mw ~62,000, average Mn ~35,000
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Paraffin wax, pellets, white
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Paraffin wax, pellets, white, tested according to Ph. Eur.
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Poly(vinyl chloride), Selectophore, high molecular weight
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Paraffin wax, tested according to Ph. Eur., high viscosity
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Paraffin wax, mp 53-58 °C (ASTM D 87)
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Poly(tetrafluoroethylene), powder (free-flowing), 1 μm particle size
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Poly(vinyl chloride), average Mw ~80,000, average Mn ~47,000
Supelco
Cellulose, DFS-0, microcrystalline, suitable for thin layer chromatography (TLC)
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Paraffin wax, meets analytical specification of Ph. Eur., white, pastilles
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Avicel® PH-101, tested according to Ph. Eur.
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Poly(tetrafluoroethylene), beads
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Paraffin wax, tested according to Ph. Eur., low viscosity
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Avicel® PH-101, ~50 μm particle size
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Paraffin wax, chunks (large), white
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Cellulose, acid washed, powder, for column chromatography
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Poly(vinyl chloride), European Pharmacopoeia (EP) Reference Standard