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Time kinetics of interaction of natural graphite (GR) to colloidal graphene(G) collagen (C) nanocomposites was studied at ambient conditions, and observedthat just one day at ambient conditions is enough to form colloidal graphenedirectly from graphite using the protein collagen. Neither controlledtemperature and pressure ambiance nor sonication was needed for the same;thereby rendering the process biomimetic. Detailed spectroscopy, X raydiffraction, electron microscopy as well as fluorescence and luminescenceassisted characterization of the colloidal dispersions on day one and day sevenreveals graphene and collagen interaction and subsequent rearrangement to forman open structure. Detailed confocal microscopy, in the liquid state, revealsthe initial attack at the zigzag edges of GR, the enhancement of autofluorescence and finally the opening up of graphitic stacks of GR to form neartransparent G. Atomic Force Microscopy studies prove the existence of bothcollagen and graphene and the disruption of periodicity at the atomic level.Thermal conductivity of the colloid shows a 17% enhancement for a volumefraction of less than 0.00005 of G. Time variant increase in thermalconductivity provides qualitative evidence for the transient exfoliation of GRto G. The composite reveals interesting properties that could propel it as afuture material for advanced bio applications including therapeutics.

Colloidal graphite/graphene nanostructures using collagen showing enhanced thermal conductivity