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Authors
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Smrati Gupta, Mukesh Agrawal, Petra Uhlmann, Frank Simon and Manfred Stamm
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Title
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Gold nanoparticles immobilized on poly(N-isopropylacrylamide) brushes
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Date
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19.08.2008
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Number
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17462
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Abstract
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Nanoparticles consisting of novel metals have interesting perspectives in the applications as catalysts, sensors and optoelectronics, provided these are templated with suitable carrier. Polymer brushes, by virtue of their nanometer dimensions and well-defined structure, offer many advantages as templates for the preparation and application of nanoparticles. We report on the adsorption of carboxyl functionalized gold nanoparticles on poly (N-isopropyl acrylamide) (PNIPAAm) brushes. PNIPAAm brushes were prepared on substrates via grafting to method and gold nanoparticles modified with carboxyl groups, were prepared via reduction of chlorauric acid with NaBH4 in presence of thiol terminated organic capping agent (11-mercaptoundecanoic acid). Functionalized particles get adsorbed on the brushes by physical interaction (hydrogen bonding) between carboxylic groups of gold particles and amide groups present on the PNIPAAm brushes. Adsorption of gold nanoparticles on the polymer brushes was confirmed by Atomic Force Microscopy (AFM) which shows change in morphology of surface of polystyrene brushes after the attachment of gold nanoparticles. It was further supported by appearance of absorption peak, characteristic of gold nanoparticles in UV-VIS spectrum of modified brushes. X-ray photoelectron spectroscopy (XPS) also revealed the presence of gold nanoparticles on brushes.<br />PMSE 311
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Publisher
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Polymeric Materials: Science and Engineering
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Wikidata
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Citation
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Polymeric Materials: Science and Engineering 99 (2008) 556-557
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DOI
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http://oasys2.confex.com/acs/236nm/techprogram/P1200359.HTM
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Tags
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