Journal
PHOTONICS, DEVICES, AND SYSTEMS VI
Volume 9450, Issue -, Pages -Publisher
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2073252
Keywords
Surface enhanced Raman scattering (SERS); carbon nanowalls (CNW); nanoparticles; thin films; nanostructures; fractals; hot spots
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Funding
- Government of the Russian Federation (Grant of the Government of the Russian Federation for the Support of Scientific Investigations under the Supervision of Leading Scientists) [14.B25.31.0019]
- scholarship from the President of the Russian Federation [MK-2773.2014.2]
- Russian Foundation for Basic Research [13-02-01075, N2 14-02-31575]
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We have elaborated substrates for surface enhanced Raman scattering (SERS) based on carbon nanowalls (CNW) deposited with Ag nanoparticles and thin Ag films. For carbon nanowalls deposited with silver nanoparticles, the achieved analytical enhancement factor SERS was from 50 to 2500. Much higher analytical enhancement factor of SERS, up to 5x10(4), was obtained for carbon nanowalls deposited with thin Ag film. In this case the SERS signal is determined by fractal structure of carbon nanowalls covered by Ag films. Such fractal structure provides a strong inhomogeneous localization of light, formation of a large number of hot spots and leads as a result to significant enhancement of SERS signal.
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