Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 360, Issue 2, Pages 350-354Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.04.105
Keywords
Gold nanoparticles; Mixed brushes; Block copolymer; Trithiocarbonate
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Funding
- National Natural Science Foundation of China [20974099]
- Zhejiang University [2008RC006]
- Fundamental Research Funds for the Central Universities [2009QNA4038]
- State Key Laboratory of Chemical Engineering [SKL-ChE-10D04]
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Amphiphilic gold nanoparticles grafted with V-shaped brushes (Au-V-brushes) were prepared by grafting a polystyrene-b-poly(ethylene oxide) (PS-b-PEO) block copolymer with a trithiocarbonate group as the junction to the Au surface. The obtained Au-V-brushes were subjected to solubility test and UV-vis, FT-IR, TEM and DLS characterizations. It is found that the Au-V-brushes are soluble in both water and organic solvents. In the common solvent DMF, the size of the Au-V-brushes is about 17 nm, whereas in selective solvents (toluene and water) aggregates of 70-90 nm are formed. Phase transfer of the Au-V-brushes from the water phase into the toluene phase occurs upon addition of Na(2)SO(4) into water and the Au-V-brushes can also transfer from the toluene phase to the interface of toluene and water phases after addition of citric acid in the water phase. (C) 2011 Elsevier Inc. All rights reserved.
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