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Authors
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Gupta, S. ; Agrawal, M. ; Uhlmann, P. ; Simon, F. ; Stamm, M.
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Title
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Poly(N-isopropyl acrylamide)-gold nanoassemblies on macroscopic surfaces: Fabrication, characterization, and application
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Date
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21.01.2010
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Number
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22462
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Abstract
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In this study, we report on the fabrication of the nanoassemblies consisting of the poly(N-isopropyl acrylamide) (PNIPAAm) brushes immobilized with gold nanoparticles (Au NPs). The employed process involves grafting of the carboxyl terminated PNIPAAm chains on an underlying substrate in a brush conformation followed by the immobilization of surface functionalized Au NPs by means of physical interaction (hydrogen bonding). Atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy have been employed to characterize the prepared PNIPAAm-Au nanoassemblies. Polymer brushes have been found to suppress the nanoparticles aggregation and, hence, facilitate the complete surface coverage. Furthermore, we demonstrated the application of resulting PNIPAAm-Au nanoassemblies in the fabrication of the temperature nanosensors. The employed approach is simple and highly versatile for the modification of macroscopic surfaces with a wide range of NPs.
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Publisher
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Chemistry of Materials
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Wikidata
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Citation
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Chemistry of Materials 22 (2010) 504-509
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DOI
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https://doi.org/10.1021/cm9031336
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Tags
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spherical polyelectrolyte brushes responsive polymer brushes gold nanoparticles optical-properties plasmon resonance au nanoparticles particles immobilization nanocrystals composite
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