TY - GEN
T1 - Amino terminated polyethylene glycol functionalized graphene and its water solubility
AU - Hou, Shifeng
AU - Cuellari, Robert D.
AU - Hakimi, Najeeb Hoshang H.
AU - Patel, Krutika
AU - Shah, Pratik
AU - Gorring, Matthew
AU - Brachfeld, Stefanie
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79952065506&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:79952065506
SN - 9781617822025
T3 - Materials Research Society Symposium Proceedings
SP - 13
EP - 19
BT - Large-Area Electronics from Carbon Nanotubes, Graphene, and Related Noncarbon Nanostructures
T2 - 2009 MRS Fall Meeting
Y2 - 30 November 2009 through 4 December 2009
ER -