Interaction of gold nanoparticles with thermoresponsive microgels: Influence of the cross-linker density on optical properties

K Gawlitza; ST Turner; F Polzer; S Wellert; M Karg; P Mulvaney; RV Klitzing

Journal article

Interaction of gold nanoparticles with thermoresponsive microgels: Influence of the cross-linker density on optical properties

K Gawlitza, ST Turner, F Polzer, S Wellert, M Karg, P Mulvaney, RV Klitzing

Physical Chemistry Chemical Physics | Published : 2013

DOI: 10.1039/c3cp51578h

Abstract

The interaction of spherical gold nanoparticles (Au-NPs) with microgels composed of chemically cross-linked poly-(N-isopropylacrylamide) is reported. Simple mixing of the two components leads to adsorption of the gold particles onto the microgels. Different loading densities can be achieved by varying the ratio of gold particles to microgel particles. The adsorption of gold nanoparticles is analysed by TEM, UV-Vis absorption spectroscopy and SAXS. The influence of the microgel mesh size on the adsorption of gold nanoparticles is investigated by using microgels with three different cross-linker densities. The results suggest a strong relationship between the nanoparticle penetration depth and..

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University of Melbourne Researchers

Paul Mulvaney Author

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Awarded by Deutsche Forschungsgemeinschaft

Awarded by deutsche Forschungsgemeinschaft (DFG)

Awarded by ARC

Awarded by Australian Research Council

Funding Acknowledgements

We thank the Deutsche Forschungsgemeinschaft (KL 1165-12/1) and the EU via a STSM for KG within the cost action D43. The TEM-experiments were carried out at the Electron microscope of the Joint Laboratory for Structural Research (JLSR) of Helmholtz-Zentrum Berlin fur Materialien und Energie (HZB), Humboldt-Universitatat zu Berlin (HU) and Technische Universitat Berlin (TU). MK is grateful to the Verband der chemischen Industrie (VCI) for financial support from the Fonds der chemischen Industrie. FP thanks the SFB 951 "Hybrid Inorganic-Organic Systems for Opto-Electronics" of the deutsche Forschungsgemeinschaft (DFG) and the Joint Lab for Structural Research (JLSR) of the Humboldt Universitat zu Berlin, the Helmholtz-Zentrum Berlin fur Materialien und Energie and the Technische Universitat Berlin for funding. PM acknowledges support from the ARC through ARC Grant FL100100117.