Hacking epson inkjet to print graphene circuits

Arxiv.org paper from University of Cambridge group has incredibly intelligent method of using a commodity epson deskjet printer to print large area graphene  devices.  Starting with flakes of pure graphite, they  exfoliated layers of graphene using liquid phase technique using  N-Methylpyrrolidone (NMP) as a solvent. They then  ultracentrifuged and then filtered to remove particles larger than  1μm that may  block the ink-jet printer heads. This forms the graphene-polymer ink, which was printed, using a modified Epson Stylus 1500 inkjet printer, onto Si/SiO2substrates and the transparent substrate borosilicate glass. Finally the excess solvent is removed by annealing.

This is another milestone is bringing graphene to practical devices.

Ink-Jet Printed Graphene Electronics, arXiv:1111.4970v1 [cond-mat.mtrl-sci]

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