Abstract
This paper is focused on the synthesis and characterization of hydrophobically modified polyelectrolytes and their use as reducing as well as stabilizing agents for the formation of gold nanoparticles. Commercially available poly(acrylic acid) has been hydrophobically modified with various degrees of grafting of butylamine introduced randomly along the chain. Different analytical methods are performed, i.e., IR and 1H-NMR spectroscopy in combination with elemental analysis to determine the degree of grafting. The modified polymers can successfully be used for the controlled single-step synthesis and stabilization of gold nanoparticles. The process of nanoparticle formation is investigated by means of UV-vis spectroscopy. The size and shape of the particles obtained in the presence of unmodified or modified polyelectrolytes are characterized by dynamic light scattering, zeta potential measurements and transmission electron microscopy. The polyelectrolytes were involved in the crystallization process of the nanoparticles, and in the presence of hydrophobic microdomains at the particle surface, a better stabilization at higher temperature can be observed.
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Acknowledgements
The authors thank A. Laschewsky, University of Potsdam & Fraunhofer Institut für Angewandte Polymerforschung Golm, for useful discussions on polymer analysis, for the use of elemental analysis facilities and for providing access to the Infrared and the UV-vis spectroscopy instruments.
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Note, C., Koetz, J., Kosmella, S. et al. Hydrophobically modified polyelectrolytes used as reducing and stabilizing agent for the formation of gold nanoparticles. Colloid Polym Sci 283, 1334–1342 (2005). https://doi.org/10.1007/s00396-005-1349-7
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DOI: https://doi.org/10.1007/s00396-005-1349-7