Gold coatings on polymer laser induced periodic surface structures: assessment as substrates for surface-enhanced Raman scattering.

Rebollar, E, Sanz, M, Pérez, S, Hernández, M, Martín-Fabiani, I, Rueda, DR, Ezquerra, TA, Domingo, C and Castillejo, M (2012) Gold coatings on polymer laser induced periodic surface structures: assessment as substrates for surface-enhanced Raman scattering. Phys Chem Chem Phys, 14 (45). pp. 15699-15705.

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Abstract

We report on the fabrication of gold coated nanostructured polymer thin films and on their characterization as substrates for surface enhanced Raman spectroscopy (SERS). Laser induced periodic surface structures (LIPSS) were obtained on thin polymer films of poly(trimethylene terephthalate) (PTT) upon laser irradiation with the fourth harmonic of a Nd:YAG laser (266 nm, pulse duration 6 ns) resulting in a period close to the incident wavelength. The nanostructured polymer substrates were coated with a nanoparticle assembled gold layer by pulsed laser deposition using the fifth harmonic of a Nd:YAG laser (213 nm, pulse duration 15 ns). Different deposition times resulted in thicknesses from a few nanometres up to several tens of nanometres. Analysis by atomic force microscopy and grazing incident small angle X-ray scattering showed that gold coating preserved the LIPSS relief. The capabilities of the produced nanostructures as substrates for SERS have been investigated using benzenethiol as a test molecule. The SERS signal is substantially larger than that observed for a gold-coated flat substrate. Advantages of this new type of SERS substrates are discussed.

Item Type:	Article
Divisions :	Surrey research (other units)
Authors :	Rebollar, E, Sanz, M, Pérez, S, Hernández, M, Martín-Fabiani, I, Rueda, DR, Ezquerra, TA, Domingo, C and Castillejo, M
Date :	5 December 2012
DOI :	10.1039/c2cp43049e
Uncontrolled Keywords :	Gold, Lasers, Molecular Structure, Nanostructures, Polyethylene Terephthalates, Spectrum Analysis, Raman, Surface Properties
Related URLs :	Author
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 13:19
Last Modified :	24 Jan 2020 23:47
URI:	http://epubs.surrey.ac.uk/id/eprint/838746

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