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O: Fachverband Oberflächenphysik
O 75: Plasmonics and Nanooptics
O 75.15: Poster
Wednesday, March 18, 2015, 18:15–21:00, Poster A
Sputter deposition of Ag on PDMS thin films for flexible SERS substrates — •Gonzalo Santoro1, Isabel M. Ochando2, Torsten Boese1, Ralph Döhrmann1, Peng Zhang1, and Stephan V. Roth1 — 1DESY, Notkestr. 85, D-22607 Hamburg, Germany — 2Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva, E-28006 Madrid, Spain
Silver (Ag) nanoclusters present excellent plasmonic properties that can be exploited for Surface Enhanced Raman Scattering (SERS) based sensors. To optimize the sensitivity of SERS substrates, it is crucial to achieve a profound understanding of the Ag nanocluster growth kinetics and to correlate the thin film morphology with its functionality [1].
This work presents in-situ time-resolved Grazing Incidence Small Angle X-ray Scattering (GISAXS) [1-3] results concerning the evolution of the nanostructures developed during the RF-sputtering of Ag on semiconductor (SiOx) and polydimethylsiloxane (PDMS) thin films, a highly flexible and stretchable silicone widely used for microfluidics. The SERS activity of the prepared thin films and the correlation of morphology and sensitivity are also presented.
[1] Santoro et al. Appl. Phys. Lett. 104, 243107 (2014); [2] Yu et al. J. Phys. Chem. Lett. 4, 3170 (2013); [3] Schwartzkopf et al. Nanoscale 5, 5053 (2013).