Microfluidization of Graphite and Formulation of Graphene-Based Conductive Inks.

Karagiannidis, Panagiotis G; Hodge, Stephen A; Lombardi, Lucia; Tomarchio, Flavia; Decorde, Nicolas; Milana, Silvia; Goykhman, Ilya; Su, Yang et al. · ACS Nano · 2017

basic_science · Level V

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Abstract

We report the exfoliation of graphite in aqueous solutions under high shear rate [∼ 10<sup>8</sup> s<sup>-1</sup>] 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 ∼2Ω/□. This is a simple and scalable production route for conductive inks for large-area printing in flexible electronics.