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Proceedings Paper

The role of surface adsorption in surface-enhanced Raman scattering from Benzene thiols
Author(s): D. A. Alexson; O. J. Glembocki; S. M. Prokes; R. W. Rendell; S. C. Badescu; J. Onuegbu; C. M. Hosten
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Paper Abstract

The origins of the surface-enhanced Raman (SERS) effect have been widely studied and are generally accepted as understood. However, there is still a need to provide a satisfactorily complete model which addresses the well known phenomena in which some molecules exhibit weak or even no SERS response at all. The relative intensities of vibrational modes observed in SERS can depend strongly on the mechanism of surface adsorption, such as bond type (covalent/noncovalent) and number of covalent bonds. Thus, in this experimental study the role of surface adsorption in surface-enhanced Raman scattering is investigated. A simple group of Benzene thiols was chosen to facilitate comparison with theoretical models. Experimental results with consideration towards surface bond strengths and reduction in degrees of freedom due to single and multiple surface bonds is presented and their effect on the relative intensities and positions of observed vibrational modes observed in the SERS spectra are discussed. The relative stability of molecules in the presence of nanostructures exhibiting strong and weak local electric fields will also be presented and discussed.

Paper Details

Date Published: 10 October 2007
PDF: 11 pages
Proc. SPIE 6768, Nanomaterials Synthesis, Interfacing, and Integrating in Devices, Circuits, and Systems II, 67680S (10 October 2007); doi: 10.1117/12.752592
Show Author Affiliations
D. A. Alexson, Naval Research Lab. (United States)
O. J. Glembocki, Naval Research Lab. (United States)
S. M. Prokes, Naval Research Lab. (United States)
R. W. Rendell, Naval Research Lab. (United States)
S. C. Badescu, Naval Research Lab. (United States)
J. Onuegbu, Howard Univ. (United States)
C. M. Hosten, Howard Univ. (United States)


Published in SPIE Proceedings Vol. 6768:
Nanomaterials Synthesis, Interfacing, and Integrating in Devices, Circuits, and Systems II
Nibir K. Dhar; Achyut K. Dutta; M. Saif Islam, Editor(s)

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