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Open Access Nano Express

Polytetrafluorethylene-Au as a substrate for surface-enhanced Raman spectroscopy

Pavel Žvátora1, Pavel Řezanka1, Vadym Prokopec1, Jakub Siegel2, Václav Švorčík2 and Vladimír Král1*

Author Affiliations

1 Department of Analytical Chemistry, Institute of Chemical Technology Prague, Technická 5, 16628, Prague 6, Czech Republic

2 Department of Solid State Engineering, Institute of Chemical Technology Prague, Technická 5, 16628 Prague 6, Czech Republic

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Nanoscale Research Letters 2011, 6:366  doi:10.1186/1556-276X-6-366

Published: 28 April 2011

Abstract

This study deals with preparation of substrates suitable for surface-enhanced Raman spectroscopy (SERS) applications by sputtering deposition of gold layer on the polytetrafluorethylene (PTFE) foil. Time of sputtering was investigated with respect to the surface properties. The ability of PTFE-Au substrates to enhance Raman signals was investigated by immobilization of biphenyl-4,4'-dithiol (BFD) from the solutions with various concentrations. BFD was also used for preparation of sandwich structures with Au or Ag nanoparticles by two different procedures. Results showed that PTFE can be used for fabrication of SERS active substrate with easy handle properties at low cost. This substrate was sufficient for the measurement of SERS spectrum of BFD even at 10-8 mol/l concentration.