Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Poster: (Hydrogels) and Elastomers
CPP 27.3: Poster
Mittwoch, 28. März 2012, 11:00–13:00, Poster A
Interaction of Au-NPs with p-NIPAM microgel particles — •Kornelia Gawlitza1, Matthias Karg2, Paul Mulvaney3, and Regine von Klitzing1 — 1Stranski-Laboratorium, Institut für Chemie, Technische Universität Berlin, Germany — 2Physical Chemistry I, University of Bayreuth, Germany — 3School of Chemistry & Bio21 Institute, University of Melbourne, Australia
In the last decades, gold nanoparticles (Au-NPs) have been used for the preparation of hybrid materials that combine organic and inorganic components.[1] Due to the thermoresponsibility of poly-N-Isopropylacrylamide (p-NIPAM) microgel particles they are of interest for a lot of applications. In the literature, the usage of Au-NPs to investigate the structure of p-NIPAM microgel particles is discussed.[2] In the present study, Au-NPs with a diameter of 18 nm were synthesized and incorporated within p-NIPAM microgel particles with a varying crosslinker content of 0.25%, 5% and 10%. By using Transmission Electron Microscopy (TEM), cryo-TEM and UV-VIS-spectroscopy, the location of the Au-NPs within the polymer network was determined. As result, the Au-NPs are only located in the outer shell of the polymer network. Additionally, an increase in temperature above the lower critical solution temperature (LCST) leads to a Plasmon-coupling which can be shown by a red shift of the absorption maximum. [1] *R. Contreras-Cáceres, A. Sánchez-Iglesias, M. Karg, I. Pastoriza-Santos, J. Pérez-Juste, J. Pacifico, T. Hellweg, A. Fernández-Barbero, L. M. Liz- Marzán, Adv. Mater. 2008, 20, 1666. [2]*M. Kuang, D. Wang, H. Möhwald, Adv. Funct. Mater. 2005, 15, 1611.