Abstract
AbstractPlatinum aggregates composed of ∼17 nm Pt nanoparticles were found recently to exhibit fairly strong surface‐enhanced Raman scattering (SERS) for adsorbed benzenethiol. In order to broaden its utility as a SERS substrate, the surface‐enhanced resonance Raman scattering (SERRS) effect of these Pt nanoaggregates on Si wafers was examined in this work using rhodamine 6G (R6G) as the probe molecule with 514.5, 568 and 632.8 nm excitation. The SERRS excitation profile appeared to be closely related to the molecular absorption of R6G, implying that the surface enhancement itself would not influence significantly the wavelength dependence of the Raman intensity of R6G on Pt nanoaggregates. The surface roughness was found nonetheless to affect in an obvious manner the enhancement factor (EF) of R6G, eventually showing a levelling off behaviour of SERR intensity with increasing surface roughness. By comparing this with the SERS of benzenethiol, the EF for R6G with 514.5 nm excitation was estimated to be 5 × 104. Copyright © 2005 John Wiley & Sons, Ltd.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
