Issue 12, 2013

Critical parameters in exfoliating graphite into graphene

Abstract

Dispersing graphite into few-layers graphene sheets (GS) in water is very appealing as an environmental-friendly, low-cost, low-energy method of obtaining graphene. Very high GS concentrations in water (0.7 mg mL−1) were obtained by optimizing the nature of dispersant and the type of ultra-sonic generator. We find that a multi-step sonication procedure involving both tip and bath sources considerably enhances the yield of exfoliated GS. Raman and transmission electron microscopy indicate few-layers graphene patches with typical size of ∼0.65 μm in one dimension and ∼0.35 μm in the other. These were further employed in combination with water-dispersed CNTs to fabricate conductive transparent electrodes for a molecularly-controlled solar-cell with an open-circuit voltage of 0.53 V.

Graphical abstract: Critical parameters in exfoliating graphite into graphene

Supplementary files

Article information

Article type
Paper
Submitted
18 Jun 2012
Accepted
09 Jan 2013
First published
10 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 4428-4435

Critical parameters in exfoliating graphite into graphene

M. Buzaglo, M. Shtein, S. Kober, R. Lovrinčić, A. Vilan and O. Regev, Phys. Chem. Chem. Phys., 2013, 15, 4428 DOI: 10.1039/C3CP43205J

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