Conductive Paintable 2D Layered MoS2 Inks
Elaine Carroll, Darragh Buckley, David McNulty, and Colm O'Dwyer
TL;DR
This paper presents a method to create conductive, paintable inks from 2D MoS2 nanosheets with tunable conductivity based on aspect ratio, enabling flexible electronic applications without polymer additives.
Contribution
It introduces a solvent-exfoliation process for high-concentration MoS2 inks with aspect ratio-dependent conductivity, allowing for paintable films with tunable electrical properties.
Findings
Conductivity depends on the aspect ratio of MoS2 flakes.
Painted MoS2 films exhibit increased conductivity with reduced width.
Inks can be prepared without polymeric additives.
Abstract
Conductive and paintable inks of 2D layered MoS2 with aspect ratio-dependent conductivity are demonstrated. Using ultrasonically assisted solvent-exfoliation of MoS2, high concentration 2D and few-layer suspensions become inks that provide coherent films when painted. Conductivity of paintable 2D MoS2 inks can be modulated by length and width, where the conductivity is linked to the painting direction. Reducing the painted film width, increases conductivity for similar length, and the films conductivity is aspect ratio-dependent. Inks of solvent-exfoliated 2D MoS2 can be painted without polymeric additives.
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