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<p>This study investigated the influence of the degree of polydispersity of silver nanoparticles on plasmon-enhanced photoluminescence (PL) and surface-enhanced Raman scattering (SERS), which is crucial for the development of sensitive sensors. Experimental and theoretical modeling demonstrate the advantages of silver nanoparticles (~ 30 nm) with higher polydispersity and polymorphicity over monodisperse particles in enhancing the photoluminescence of a "green" luminophore, as well as SERS and resonance SERS (SERRS) of dyes under green light excitation within the resonance range of individual silver nanoparticles. When red excitation (620 nm and 633 nm) within the plasmon resonance of silver nanoparticle aggregates was used, no significant effect of Ag nanoparticle polydispersity on the enhancement of PL, SERS, or SERRS was observed. These findings highlight the importance of considering metal nanoparticle polydispersity when optimizing sensor systems based on plasmonic enhancement and challenge the conventional prioritization of monodispersity in plasmonic sensor design and offer practical guidelines for optimizing enhancement efficiency.</p>

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Impact of Silver Nanoparticle Polydispersity On Plasmonic Effects

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Taisia Efimova,
  • Maxim Khombak,
  • Andrei Ramanenka,
  • Pavel Kratovich,
  • Olga Kulakovich

摘要

This study investigated the influence of the degree of polydispersity of silver nanoparticles on plasmon-enhanced photoluminescence (PL) and surface-enhanced Raman scattering (SERS), which is crucial for the development of sensitive sensors. Experimental and theoretical modeling demonstrate the advantages of silver nanoparticles (~ 30 nm) with higher polydispersity and polymorphicity over monodisperse particles in enhancing the photoluminescence of a "green" luminophore, as well as SERS and resonance SERS (SERRS) of dyes under green light excitation within the resonance range of individual silver nanoparticles. When red excitation (620 nm and 633 nm) within the plasmon resonance of silver nanoparticle aggregates was used, no significant effect of Ag nanoparticle polydispersity on the enhancement of PL, SERS, or SERRS was observed. These findings highlight the importance of considering metal nanoparticle polydispersity when optimizing sensor systems based on plasmonic enhancement and challenge the conventional prioritization of monodispersity in plasmonic sensor design and offer practical guidelines for optimizing enhancement efficiency.