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Open Access Nano Express

Nanostructured Silver Substrates With Stable and Universal SERS Properties: Application to Organic Molecules and Semiconductor Nanoparticles

MV Chursanova1*, VM Dzhagan2, VO Yukhymchuk2, OS Lytvyn2, M Ya. Valakh2, IA Khodasevich3, D Lehmann4, DRT Zahn4, C Waurisch5 and SG Hickey5

Author Affiliations

1 National Technical University of Ukraine “KPI”, 37 Prospect Peremohy, 03056, Kyiv, Ukraine

2 V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028, Kyiv, Ukraine

3 B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 220072, Minsk, Belarus

4 Semiconductor Physics, Chemnitz University of Technology, 09107, Chemnitz, Germany

5 Physical Chemistry/Electrochemistry, IFW Dresden, 01171, Dresden, Germany

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Nanoscale Research Letters 2009, 5:403-409  doi:10.1007/s11671-009-9496-2

Published: 27 November 2009

Abstract

Nanostructured silver films have been prepared by thermal deposition on silicon, and their properties as SERS substrates investigated. The optimal conditions of the post-growth annealing of the substrates were established. Atomic force microscopy study revealed that the silver films with relatively dense and homogeneous arrays of 60–80-nm high pyramidal nanoislands are the most efficient for SERS of both organic dye and inorganic nanoparticles analytes. The noticeable enhancement of the Raman signal from colloidal nanoparticles with the help of silver island films is reported for the first time.

Keywords:
SERS; Ag/Si nanoisland films; Post-growth annealing; Rhodamine 6G; CdSe; Nanoparticles