Quantifying the Sensitivity of Multipolar (Dipolar, Quadrupolar, and Octapolar) Surface Plasmon Resonances in Silver Nanoparticles: The Effect of Size, Composition, and Surface Coating

Neus G. Bastús, Jordi Piella, Víctor Puntes

    Research output: Contribution to journalArticleResearchpeer-review

    60 Citations (Scopus)

    Abstract

    © 2015 American Chemical Society. The effect of composition, size, and surface coating on the sensitivity of localized multipolar surface plasmon resonances has been spectroscopically investigated in high-quality silver colloidal solutions with precisely controlled sizes from 10 to 220 nm and well-defined surface chemistry. Surface plasmon resonance modes have been intensively characterized, identifying the size-dependence of dipolar, quadrupolar, and octapolar modes. Modifications of the NP's surface chemistry revealed the higher sensitivity of large sizes, long molecules, thiol groups, and low-order resonance modes. We also extend this study to gold nanoparticles, aiming to compare the sensitivity of both materials, quantifying the higher sensitivity of silver.
    Original languageEnglish
    Pages (from-to)290-300
    JournalLangmuir
    Volume32
    Issue number1
    DOIs
    Publication statusPublished - 12 Jan 2016

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