Critical parameters in exfoliating graphite into graphene

Matat Buzaglo; Michael Shtein; Sivan Kober; Robert Lovrinčić; Ayelet Vilan; Oren Regev; Robert Lovrincic

doi:10.1039/c3cp43205j

Critical parameters in exfoliating graphite into graphene

Matat Buzaglo, Michael Shtein, Sivan Kober, Robert Lovrinčić, Ayelet Vilan, Oren Regev, Robert Lovrincic

Ben-Gurion University of the Negev, Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

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.

Original language	American English
Pages (from-to)	4428-4435
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	12
DOIs	https://doi.org/10.1039/c3cp43205j
State	Published - 27 Feb 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c3cp43205j

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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.",

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T1 - Critical parameters in exfoliating graphite into graphene

AU - Buzaglo, Matat

AU - Shtein, Michael

AU - Kober, Sivan

AU - Lovrinčić, Robert

AU - Vilan, Ayelet

AU - Regev, Oren

AU - Lovrincic, Robert

PY - 2013/2/27

Y1 - 2013/2/27

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Critical parameters in exfoliating graphite into graphene

Abstract

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