Graphene-protein bioelectronic devices with wavelength-dependent photoresponse

Details Graphene-protein bioelectronic devices with wavelength-dependent photoresponse Graphene-protein bioelectronic devices with wavelength-dependent photoresponse

2011-12-28

arxiv.org/abs/1112.6183v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures; To appear in Applied Physics Letters

Scientific paper

We implemented a nanoelectronic interface between graphene field effect transistors (FETs) and soluble proteins. This enables production of bioelectronic devices that combine functionalities of the biomolecular and inorganic components. The method serves to link polyhistidine-tagged proteins to graphene FETs using the tag itself. Atomic Force Microscopy and Raman spectroscopy provide structural understanding of the bio/nano hybrid; current-gate voltage measurements are used to elucidate the electronic properties. As an example application, we functionalize graphene FETs with fluorescent proteins to yield hybrids that respond to light at wavelengths defined by the optical absorption spectrum of the protein

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