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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 1: Nanoparticles and Composite Materials I

CPP 1.7: Hauptvortrag

Montag, 11. März 2013, 11:30–12:00, H34

Photonic structures based on responsive nanoparticle/microgel hybrids — •Thomas Hellweg — Universität Bielefeld, Physikalische und Biophysikalische Chemie (PC III), Universitätsstr. 25, 33615 Bielefeld, Germaany

Microgels based on responsive polymers can be combined with metal nanoparticles leading to materials with responsive optical properties (1). Ordering of nanoparticles into assemblies which are well-defined on the nanoscale and at the same time of macroscopic dimensions is one of the most pressing challenges in materials science. If particles are aggregating in a random fashion, often uncontrolled electronic coupling effects occur, which result in less defined electronic, optical or magnetic properties or in a complete loss of the specific nanoparticle effects and a re-entrance of bulk material properties. Creating ordered nanoparticle structures is one means of avoiding such uncontrolled coupling. In this context hybrids of microgels and nanoparticles are offering interesting pathways for 2 and 3 D assembly (2,3). The present contribution will describe the properties of these hybrids and discuss strategies of their assembly.
(1) Karg, M. und T. Hellweg, Current Opinion in Coll. Interf. Sci.; 14, 438–450, 2009
(2) Müller, M., M. Karg, A. Fortini, T. Hellweg und A. Fery, Nanoscale, 4:2491–2499, 2012
(3) Karg, M., T. Hellweg und P. Mulvaney, Adv. Func. Mater.; 21:4668–4676, 2011