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Quantification of the Particle Size and Stability of Graphene Oxide in a Variety of Solvents
Author(s) -
TahaTijerina Jaime,
Venkataramani Deepika,
Aichele Clint P.,
Tiwary Chandra Sekhar,
Smay James E.,
Mathkar Akshay,
Chang Patricia,
Ajayan Pulickel M.
Publication year - 2015
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201400099
Subject(s) - graphene , oxide , zeta potential , suspension (topology) , chemical engineering , materials science , flocculation , ethylene glycol , colloid , nanotechnology , solvent , particle size , aqueous solution , organic chemistry , chemistry , nanoparticle , mathematics , homotopy , pure mathematics , engineering
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.