Microfluidization of graphite and formulation of graphene-based conductive inks

Abstract

We report the exfoliation of graphite in aqueous solutions under high shear rate [$\sim 10^8{s}^{-1}$] turbulent flow conditions, with a 100\% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below$\sim 2\Omega /\square$. This is a simple and scalable production route for graphene-based conductive inks for large area printing in flexible electronics.

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• The Raman Fingerprint of Graphene
• Raman spectroscopy as a versatile tool for studying the properties of graphene
• Tuning the catalytic activity of graphene nanosheets for oxygen reduction reaction via size and thickness reduction

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