Mechanism Switch in Surface-Enhanced Raman Scattering: The Role of Nanoparticle Dimensions
Qi Hao,
Yijing Chen,
Yunjia Wei
et al.
Abstract:Surface-enhanced Raman scattering (SERS) is renowned for amplifying Raman signals, with electromagnetic mechanism (EM) enhancement arising from localized surface plasmon resonances and chemical mechanism (CM) enhancement as a result of charge transfer interactions. Despite the conventional emphasis on EM as a result of plasmonic effects, recent findings highlight the significance of CM when noble metals appear as smaller entities. However, the threshold size of the noble metal clusters/particles corresponding … Show more
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