Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 1: Nanoparticles and Composite Materials I

CPP 1.9: Talk

Monday, March 11, 2013, 12:15–12:30, H34

Wrinkle-Assisted Self-Assembly of PNIPAM Coated Nanostars as SERS Platforms for Sensing of PAHs in Gas Phase — Mareen Mueller, •Moritz Tebbe, Nicolas Pazos-Perez, and Andreas Fery — Department of Physical Chemistry II, University of Bayreuth, 95440, Bayreuth, Germany

Plasmonic nanoparticles are excellent candidates for their potential use in microelectronic, optical and biomedical applications. Their electromagnetic behaviour is highly dependent on their specific particle size, shape, and surrounding environment. Various different synthetic methods allow us to fine tune the particle shape and size thus, the materials properties. However, the lack of capability to form reproducible organized structures is still a challenge to solve in order to use them in new technologies. Template-assisted self-assembly is a versatile platform to generate particle assemblies in high quality and with high reproducibility. Compared to lithographically prepared templates, controlled surface wrinkling on elastomers is an alternative approach to produce structured surfaces with periodicities in the range of nanometres. The use of wrinkled surfaces as templates for nanoparticle alignment via printing, results in highly ordered nanoparticle arrays. In this work a new surface enhanced Raman spectroscopy (SERS) platform based on the extended organization of poly-N-isopropylacrylamide (pNIPAM)-coated gold nanostars over large areas into parallel lines is presented.[1] This system yields high and homogeneous SERS intensities, and simultaneously traps PAH traces, e.g. pyrene, as pollutants from the gas phase. 1. Mueller, M., et al., Langmuir, 2012. 28(24): p. 9168-9173.