Amino terminated polyethylene glycol functionalized graphene and its water solubility

Shifeng Hou, Robert D. Cuellari, Najeeb Hoshang H. Hakimi, Krutika Patel, Pratik Shah, Matthew Gorring, Stefanie Brachfeld

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


A chemical modification process was developed to functionalize graphene with specific groups. Graphene oxide (GO) was successfully functionalized with thionyl bromide which can be used as precursors for further functionalization. Amino terminated-polyethylene glycol (PEG-NH2) molecules were linked to single-layer graphene sheets through covalent bond. FT-IR, SEM and UV-vis spectroscopy techniques were used to characterize PEG modified graphene oxide and PEG modified reduced graphene oxide (PEG-RG). PEG-RG could disperse in water, tetrahydrofuran and ethylene glycol, with individual, single-layer graphene sheets spontaneously. The dispersion behavior of PEG-RG in an aqueous solvent has been investigated. A series of solutions of PEG-RG with concentrations of 0.001% to 1.5% were prepared and the PEG-RG dispersions exhibited long-term stability. In addition, a PEG-RG film with layered structure and high conductivity has been successfully prepared by filtration.

Original languageEnglish
Title of host publicationLarge-Area Electronics from Carbon Nanotubes, Graphene, and Related Noncarbon Nanostructures
Number of pages7
StatePublished - 2010
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: 30 Nov 20094 Dec 2009

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2009 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA


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