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Biosensors, Volume 10, Issue 1 (January 2020) – 7 articles
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Cover Story (view full-size image) Graphene is a one-atom-thick, two-dimensional, honey-comb arrangement of hybridized carbon atoms [...] Read more. Graphene is a one-atom-thick, two-dimensional, honey-comb arrangement of hybridized carbon atoms with extraordinary electrical conductivity. Since most biological media and cell cultures are aqueous, a stable and processable dispersion of aqueous graphene is essential for the survival of cells in electrophysiological applications. Herein, we combined the shear force of low-speed ball milling with stabilizing characteristics of an edible protein to exfoliate graphene from pristine graphite in water. The produced graphene solution was formulized as a conductive ink, 3D-printed into a flexible substrate, and consolidated via a strong electrostatic field. Ultimately, the biocompatibility of these conductive patterns is demonstrated in the presence of neuronal cells.View this paper.