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Quantification of the Particle Size and Stability of Graphene Oxide in a Variety of Solvents

Taha-Tijerina, Jaime and Venkataramani, Deepika and Aichele, Clint P and Tiwary, Chandra Sekhar and Smay, James E and Mathkar, Akshay and Chang, Patricia and Ajayan, Pulickel M (2015) Quantification of the Particle Size and Stability of Graphene Oxide in a Variety of Solvents. In: PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 32 (3). pp. 334-339.

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Official URL: http://dx.doi.org/10.1002/ppsc.201400099


The exceptional solution processing potential of graphene oxide (GO) is always one of its main advantages over graphene in terms of its industrial relevance in coatings, electronics, and energy storage. However, the presence of a variety of functional groups on the basal plane and edges of GO makes understanding suspension behavior in aqueous and organic solvents, a major challenge. Acoustic spectroscopy can also measure zeta potential to provide unique insight into flocculating, meta-stable, and stable suspensions of GO in deionized water and a variety of organic solvents (including ethanol, ethylene glycol, and mineral oil). As expected, a match between solvent polarity and the polar functional groups on the GO surface favors stable colloidal suspensions accompanied by a smaller aggregate size tending toward disperse individual flakes of GO. This work is significant since it describes the characteristics of GO in solution and its ability to act as a precursor for graphene-based materials.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
Keywords: graphene oxide; particle size-morphology; dispersion stability; graphene oxide stability; acoustic spectroscopy
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 24 Apr 2015 05:58
Last Modified: 24 Apr 2015 05:58
URI: http://eprints.iisc.ac.in/id/eprint/51385

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