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- W2029504562 abstract "In this paper, we present systematic measurements of the ultrafast dephasing time T2 of surface plasmon excitations in silver nanoparticles exposed to different chemical environments. The objective of the measurements is,whether or not different chemical environments infuence independently the damping of the plasmon resonance,i.e., clarify if the Matthiessen law can always be applied. For this purpose, measurements of T2 in the sizerange between Req = 7 nm and 18 nm were carried out for nanoparticles on different substrates and in differentchemical environments. Subsequently, the damping parameter A, which quantifes the infuence of extrinsic andintrinsic size effects of the different damping mechanisms on T2, has been determined. While A = 0.13 nm/fs hasbeen determined for quasi-free nanoparticles, the A parameter increases to approximately A = 0.55 nm/fs fornanoparticles on a quartz substrate, and further to A = 1.8 nm/fs for supported nanoparticles covered with SO2.Most importantly, the well known Matthiessen law cannot be applied to the nanoparticle systems investigatedhere, because different chemical damping channels do not contribute independently to the damping of the surfaceplasmon resonance." @default.
- W2029504562 created "2016-06-24" @default.
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- W2029504562 date "2011-02-10" @default.
- W2029504562 modified "2023-09-25" @default.
- W2029504562 title "Chemical damping of the localized surface plasmon polariton resonance: infuence of different chemical environments" @default.
- W2029504562 doi "https://doi.org/10.1117/12.876270" @default.
- W2029504562 hasPublicationYear "2011" @default.
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