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T. Abdallah, T.A. El-Brolosy, M. B. Mohamed, K. Easawi, S. Negm and H. Talaat Effect of shape and interstice on surface enhanced Raman scattering (SERS) of molecules adsorbed on gold nanoparticles in the near-dipole and quadrupole regions Journal of Raman Spectroscopy 43

Version of Record online: 15 JUL 2012 | DOI: 10.1002/jrs.4131

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Surface enhanced Raman scattering (SERS) of adsorbed molecule on colloidal gold nanospheres (NSs), nanorods, and nanoprisms (NPs) in the near-dipole and near-quadrpole regions of the nanoparticles, show that the SERS enhancement is the largest for the sharp tip NPs and least for the NSs. These enhancements are due to the binding energies of the nanocrystal facets, but a larger contribution from the plasmon electromagnetic fields. FDTD show agreement with SERS enhancement for the different shapes.

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