How are resonance Raman properties of silver clusters affected by interaction with small molecules?

How are resonance Raman properties of silver clusters affected by interaction with small molecules?

… Download …


Part of #How are resonance Raman properties of silver clusters affected by interaction with small molecules?# :

Publishing year : 2015

Conference : Eighteenth congress of chemistry physics of iran

Number of pages : 4

Abstract: Raman scattering is caused by the interaction between light and the polarizability components of the complex. Over the last few decades, the application of metal nanoparticles, especially those that support plasmon excitations, led to several new, more efficientspectroscopic methods including Surface-Enhanced Raman Spectroscopy (SERS). Two major mechanisms were proposed for describing enhancements in SERS; First one is theElectromagnetic Mechanism (EM) as a result of the strong local field at the surface of thatanoparticle, which is the main contribution to the enhancement, and the second is theChemical Mechanism (CHEM) due to chemical coupling between the free molecule andthe nanoparticle. Although it is impossible to separately measure each mechanismenhancement, it is established that the main contribution is caused by EM.