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Title: Organo- and water-dispersible graphene oxide-polymer nanosheets for organic electronic memory and gold nanocomposites
Authors: Li, G.L.
Liu, G. 
Li, M.
Wan, D.
Neoh, K.G. 
Kang, E.T. 
Issue Date: 29-Jul-2010
Source: Li, G.L., Liu, G., Li, M., Wan, D., Neoh, K.G., Kang, E.T. (2010-07-29). Organo- and water-dispersible graphene oxide-polymer nanosheets for organic electronic memory and gold nanocomposites. Journal of Physical Chemistry C 114 (29) : 12742-12748. ScholarBank@NUS Repository.
Abstract: A solution-processable graphene oxide (GO)-polymer complex, consisting of GO nanosheets with covalently grafted poly(tert-butyl acrylate) (PtBA) brushes, was prepared via surface-initiated atom transfer radical polymerization (ATRP). The grafted hydrophobic polymer brushes substantially enhance the solubility of GO in organic solvents, and the GO-g-PtBA nanosheets can form a uniform and stable dispersion in toluene. The functionalized GO nanosheets can also be integrated into an electroactive polymer matrix. Bistable electrical conductivity switching behavior and a nonvolatile electronic memory effect were demonstrated in a composite thin film of poly(3-hexylthiophene) (P3HT) containing 5 wt % GO-g-PtBA in an Al/GO-g-PtBA+P3HT/ITO sandwich structure (ITO = indium-tin oxide). Hydrolysis of GO-g-PtBA produces water-dispersible GO-g-PAAc (PAAc = poly(acrylic acid)) nanosheets and allows the preparation of gold nanoparticle-decorated GO-g-PAAc nanofilms from aqueous dispersions. © 2010 American Chemical Society.
Source Title: Journal of Physical Chemistry C
ISSN: 19327447
DOI: 10.1021/jp102640s
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