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Full Paper
Nanorod-Coated PNIPAM Microgels: Thermoresponsive Optical Properties
Article first published online: 8 MAY 2007
DOI: 10.1002/smll.200700078
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Karg, M., Pastoriza-Santos, I., Pérez-Juste, J., Hellweg, T. and Liz-Marzán, Luis M. (2007), Nanorod-Coated PNIPAM Microgels: Thermoresponsive Optical Properties. Small, 3: 1222–1229. doi: 10.1002/smll.200700078
Publication History
- Issue published online: 22 JUN 2007
- Article first published online: 8 MAY 2007
- Manuscript Received: 31 JAN 2007
Keywords:
- gold;
- microgels;
- nanoparticles;
- nanorods;
- plasmon resonance
Abstract
Nanoparticles and in particular gold nanorods have interesting optical properties arising from two well-differentiated plasmon modes. The frequency of such modes can be altered by their chemical environment and coupling with neighboring rods. This study investigates new composite materials made of gold nanorods adsorbed on thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) microgels. It is shown that the thermally induced collapse of the polymer network inside the particles leads to a red shift of the longitudinal plasmon band of the gold rods, which is found to be fully reversible.