TY - GEN
T1 - Graphene oxide as a two-dimensional surfactant
AU - Koltonow, Andrew R.
AU - Kim, Jaemyung
AU - Cote, Laura J.
AU - Luo, Jiayan
AU - Huang, Jiaxing
N1 - Funding Information:
This work was supported by the National Science Foundation through a CAREER award (DMR 0955612). J.H. thanks the Northwestern Materials Research Science and Engineering Center (NSF DMR-0520513) for a capital equipment fund for the purchase of BAM and additional support from Sony Corporation. A.R.K. and L.J.C. are NSF graduate research fellows. J.H. is an Alfred P. Sloan Research Fellow. J.K.and J.L. gratefully acknowledges support from the Ryan Fellowship and the Northwestern University International Institute for Nanotechnology.
PY - 2012
Y1 - 2012
N2 - Graphene oxide (GO) is a nonstoichiometric two-dimensional material obtained from the chemical oxidation and exfoliation of graphite, which has recently attracted intense research interest as a precursor for bulk production of graphene. GO has long been believed to be hydrophilic due to its dispersibility in water. Recent work in our group, however, has found that GO is actually a two-dimensional amphiphile; the edge of the sheet-like material is hydrophilic, while the basal plane of the material contains more hydrophobic graphitic nanodomains. To prove the concept, we demonstrate GO's surface activity at an air-water interface, as well as its utility in dispersing insoluble aromatic materials such as toluene, graphite, and carbon nanotubes in water. As a colloidal surfactant which can be converted to a conducting material, GO presents unique possibilities for aqueous solution processing of organic electronic materials.
AB - Graphene oxide (GO) is a nonstoichiometric two-dimensional material obtained from the chemical oxidation and exfoliation of graphite, which has recently attracted intense research interest as a precursor for bulk production of graphene. GO has long been believed to be hydrophilic due to its dispersibility in water. Recent work in our group, however, has found that GO is actually a two-dimensional amphiphile; the edge of the sheet-like material is hydrophilic, while the basal plane of the material contains more hydrophobic graphitic nanodomains. To prove the concept, we demonstrate GO's surface activity at an air-water interface, as well as its utility in dispersing insoluble aromatic materials such as toluene, graphite, and carbon nanotubes in water. As a colloidal surfactant which can be converted to a conducting material, GO presents unique possibilities for aqueous solution processing of organic electronic materials.
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U2 - 10.1557/opl.2011.1367
DO - 10.1557/opl.2011.1367
M3 - Conference contribution
AN - SCOPUS:83755178685
SN - 9781605113210
T3 - Materials Research Society Symposium Proceedings
SP - 93
EP - 100
BT - Functional Two-Dimensional Layered Materials - From Graphene to Topological Insulators
T2 - 2011 MRS Spring Meeting
Y2 - 25 April 2011 through 29 April 2011
ER -