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Proceedings Paper

Femtosecond laser induced nanostructuring for surface enhanced Raman spectroscopy
Author(s): H. Messaoudi; S. K. Das; J. Lange; F. Heinrich; S. Schrader; M. Frohme; R. Grunwald
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Paper Abstract

The formation of periodical nanostructures with femtosecond laser pulses was used to create highly efficient substrates for surface-enhanced Raman spectroscopy (SERS). We report about the structuring of silver and copper substrates and their application to the SERS of DNA (herring sperm) and protein molecules (egg albumen). The maximum enhancement factors were found on Ag substrates processed with the second harmonic generation (SHG) of a 1-kHz Ti:sapphire laser and structure periods near the SHG wavelength. In the case of copper, however, the highest enhancement was obtained with long-period ripples induced with at fundamental wavelength. This is explained by an additional significant influence of nanoparticles on the surface. Nanostructured areas in the range of 1.25 mm2 were obtained in 10 s. The surfaces were characterized by scanning electron microscopy, Fast Fourier Transform and Raman spectroscopy. Moreover, the role of the chemical modification of the metal structures is addressed. Thin oxide layers resulting from working in atmosphere which improve the biocompatibility were indicated by vibration spectra. It is expected that the detailed study of the mechanisms of laser-induced nanostructure formation will stimulate further applications of functionalized surfaces like photocatalysis, selective chemistry and nano-biology.

Paper Details

Date Published: 7 March 2014
PDF: 8 pages
Proc. SPIE 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV, 89720H (7 March 2014); doi: 10.1117/12.2037052
Show Author Affiliations
H. Messaoudi, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Univ. of Applied Sciences Wildau (Germany)
Bremen Institute of Applied Beam Technology (Germany)
S. K. Das, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
J. Lange, Univ. of Applied Sciences Wildau (Germany)
F. Heinrich, Univ. of Applied Sciences Wildau (Germany)
S. Schrader, Univ. of Applied Sciences Wildau (Germany)
M. Frohme, Univ. of Applied Sciences Wildau (Germany)
R. Grunwald, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)


Published in SPIE Proceedings Vol. 8972:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV
Alexander Heisterkamp; Peter R. Herman; Michel Meunier; Stefan Nolte, Editor(s)

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