The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Solvent-Exfoliated Graphene at Extremely High Concentration
Abstract
We describe three related methods to disperse graphene in solvents with concentrations from 2 to 63 mg/mL. Simply sonicating graphite in N-methyl-2-pyrrolidinone, followed by centrifugation, gives dispersed graphene at concentrations of up to 2 mg/mL. Filtration of a sonicated but uncentrifuged dispersion gives a partially exfoliated powder that can be redispersed at concentrations of up to 20 mg/mL. However, this process can be significantly improved by removing any unexfolaited graphite from the starting dispersion by centrifugation. The centrifuged dispersion can be filtered to give a powder of exfoliated few-layer graphene. This powder can be redispersed at concentrations of at least 63 mg/mL. The dispersed flakes are ~1 μm long and ~3 to 4 layers thick on average. Although some sedimentation occurs, ~26-28 mg/mL of the dispersed graphene appears to be indefinitely stable.
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Cites
Graphene-based composite materials
Stankovich, S., Dikin, D. A., Dommett, G. H. B., Kohlhaas, K. M., Zimney, E. J., Stach, E. A., Piner, R. D., Nguyen, S. T., & Ruoff, R. S. (2006) · Nature · doi:10.1038/nature04969 · Cited by 12,922
Cited by
Grapheneviasonication assisted liquid-phase exfoliation
Ciesielski, A., & Samorì, P. (2014) · Chem. Soc. Rev. · doi:10.1039/c3cs60217f · Cited by 1,207
Chabot, V., Higgins, D., Yu, A., Xiao, X., Chen, Z., & Zhang, J. (2014) · Energy & Environmental Science · doi:10.1039/c3ee43385d · Cited by 1,119
Sensitive, High-Strain, High-Rate Bodily Motion Sensors Based on Graphene–Rubber Composites
Boland, C. S., Khan, U., Backes, C., O’Neill, A., McCauley, J., Duane, S., Shanker, R., Liu, Y., Jurewicz, I., Dalton, A. B., et al. (2014) · ACS Nano · doi:10.1021/nn503454h · Cited by 793
Self-citationGraphene synthesis: relationship to applications
Edwards, R. S., & Coleman, K. S. (2013) · Nanoscale · doi:10.1039/c2nr32629a · Cited by 773
Methods of graphite exfoliation
Cai, M., Thorpe, D., Adamson, D. H., & Schniepp, H. C. (2012) · Journal of Materials Chemistry · doi:10.1039/c2jm34517j · Cited by 508
Metadata
- Authors
- Khan, U., Porwal, H., O’Neill, A., Nawaz, K., May, P., & Coleman, J. N.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-06-30
- Volume
- 27
- Issue
- 15
- Pages
- 9077-9082
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W1996510060
- Cited by
- 354
- References
- 1
- FWCI
- 14.56
- Type
- journal article
- Language
- en
- Open access
- closed
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