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|Title:||Organo- and water-dispersible graphene oxide-polymer nanosheets for organic electronic memory and gold nanocomposites|
|Citation:||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|
|Appears in Collections:||Staff Publications|
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