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Journal article

Surface-enhanced Raman spectroscopy on novel black silicon-based nanostructured surfaces

By Talian, Ivan; Mogensen, Klaus Bo1,2,3; Orinak, A.; Kaniansky, D.; Hübner, Jörg3

From

ChemLabChip Group, LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark1

LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark2

Department of Micro- and Nanotechnology, Technical University of Denmark3

Two different black silicon nanostructured surfaces modified with thin gold layers were tested for analytical signal enhancement with Surface-Enhanced Raman Spectroscopy (SERS). The relationship between the thicknesses of the gold layers and the analytical signal enhancement was studied. Also, effects of Ti and Ti/Pt adhesion layers underneath the gold layers on the analytical signal enhancement were tested.

An enhancement factor of 7.6 x 10(7) with the excitation laser 785 nm was achieved for the tested analyte, Rhodamine 6G, and non-resonance SER spectra were recorded in a 5 s acquisition mode. Such an enhancement enables to achieve a detection limit down to 2.4 pg of Rhodamine 6G on a black silicon-based nanosurface coated with a 400-nm-thin layer of gold.

Language: English
Publisher: John Wiley & Sons, Ltd.
Year: 2009
Pages: 982-986
ISSN: 10974555 and 03770486
Types: Journal article
DOI: 10.1002/jrs.2213
ORCIDs: Hübner, Jörg
Keywords

Rhodamine 6G SERS enhancement nanosurfaces

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