title: Quantifying the Sensitivity of Multipolar (Dipolar, Quadrupolar, and Octapolar) Surface Plasmon Resonances in Silver Nanoparticles: The Effect of Size, Composition, and Surface Coating.
abstract: 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.
authors.affiliation: Institut Català de Nanociència i Nanotecnologia (ICN2) , Campus UAB, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Neus G
authors.initials: NG
authors.lastname: Bastús
authors.affiliation: Institut Català de Nanociència i Nanotecnologia (ICN2) , Campus UAB, 08193 Bellaterra, Barcelona, Spain.|Universitat Autònoma de Barcelona (UAB) , Campus UAB, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Piella
authors.affiliation: Institut Català de Nanociència i Nanotecnologia (ICN2) , Campus UAB, 08193 Bellaterra, Barcelona, Spain.|Institut Català de Recerca i Estudis Avançats (ICREA) , 08010 Barcelona, Spain.
authors.forename: Víctor
authors.initials: V
authors.lastname: Puntes