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Silver Nanoparticle Rings of Controllable Size: Multi-Wavelength SERS Response and High Enhancement of Three Pyridine Derivatives

Abstract : The preparation method of nanoporous poly(methyl methacrylate)( PMMA) containing silver nanoparticles self-organized in rings is highly adaptable, yielding a variety of materials of controllable pore size (ranging from 200 nm to over 5 mu m), nanoparticle size (20 to 200 nm), surface coverage and silver precursor concentration. In this article, it is optimized aiming at a best performance as enhancers for Surface Enhanced Raman Spectroscopy. The versatility of these sensors is shown by multi-wavelength excitation experiment at 457, 488, 514 and 633 nm. Finally, the efficiency of 2,2'-bipyridine, 4,4'-bipyridine and trans-bis-(4,4'-bipyridyl) ethylene as SERS probe molecules is compared using PMMA/Ag-rings. Ag+ ions are shown to play an important role in the adsorption of the target molecules on these surfaces leading to a SERS enhancement factor of 3.783 108 at 488 nm for trans-bis-(4,4'-bipyridyl) ethylene.
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https://hal.univ-lorraine.fr/hal-01517129
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Submitted on : Tuesday, May 2, 2017 - 4:58:53 PM
Last modification on : Wednesday, November 13, 2019 - 11:50:04 AM

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Maher Khanafer, Irene Izquierdo-Lorenzo, Suzanna Akil, Guy Louarn, Joumana Toufaily, et al.. Silver Nanoparticle Rings of Controllable Size: Multi-Wavelength SERS Response and High Enhancement of Three Pyridine Derivatives. ChemistrySelect, Wiley, 2016, 1 (6), pp.1201-1206. ⟨10.1002/slct.201600035⟩. ⟨hal-01517129⟩

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