Nanoparticles plasmons

Yang J, Lee JY, Too PIP (2006) Phase-transfer identification of core-shell structures in bimetallic nanoparticles. Plasmonics 1 67-78... 

The decay of the nanoparticle plasmons can be either radiative, ie by emission of a photon, or non-radiative (Figure 7.5). Within the Drude-Sommerfeld model the plasmon is a superposition of many independent electron oscillations. The non-radiative decay is thus due to a dephasing of the oscillation of individual electrons. In terms of the Drude-Sommerfeld model this is described by scattering events with phonons, lattice ions, other conduction or core electrons, the metal surface, impurities, etc. As a result of the Pauli exclusion principle, the electrons can be excited into empty states only in the CB, which in turn results in electron-hole pair generation. These excitations can be divided into inter- and intraband excitations by the origin of the electron either in the d-band or the CB (Figure 7.5) [15]. 

Watanabe K, Kim KH, Menzel D, Freund H-J. Hyperthermal chaotic photodesorption of xenon from alumina-supported silver nanoparticles plasmonic coupling and plasmon-induced desorption. Phys Rev Lett. 2007 99 225501. 

Miller, M. M. and Lazarides, A. A. (2006). Seiisitivity of metal nanoparticle plasmon resonance band position to the dielectric environment as observed in scattering. J. Opt. A Pure Appl. Opt. 8 S239-S249. 

Lee, J., Govorov, A. O., Dulka, J., and Kotov, N. A. (2004). Bioconjugates of CdTe Nanowires and Au Nanoparticles Plasmon-Exciton Interactions, Luminescence Enhancement, and Collective Effects. Nano Lett. 4 2323-2330. 

Nitzan and Brus developed an analytical formula for the molecular absorption cross section given the model defined above [14]. Figure 9.2 is taken fi"om Ref. [13] and shows the calculated absorption cross section based on the model associated with the photodissociation of I2. (The I2 formed through the absorption process is very short lived.) Photodissociation predicted to be enhanced as the molecule is placed near a silver metal nanoparticle of radius a - 50 nm near the electronic transition resonance position of cat) 22,200 cm . If e eiai(co) is the dielectric fiinction for the metal, a small metal nanoparticle plasmon in air will have its dipolar surface plasmon resonance at frequency <24 such that [1]... 

Maier SA, Kik PG, Atwater HA, Meltzer S, Harel E, Koel BE, Requicha A AG (2003) Local detection of electromagnetic energy transport below the diffraction limit in metal nanoparticle plasmon waveguides. Nat Mater 2(4) 229-232... 

Geshev PI, Fischer U, Fuchs H (2010) Calculation of tip enhanced Raman scattering caused by nanoparticle plasmons acting on a molecule placed near a metallic film. Phys Rev B 81(12) 125441... 

The 2PPS method is also very powerful to probe the mobility of the clusters on the surface because the photoelectron 3ueld is known to considerably increase as the clusters start to diffuse and agglomerate on the surface due to the development of a nanoparticle plasmon absorption. Figurel.il shows... 

The sizes of the Au(0) nanoparticles grown in these aerogels, measured by TEM, depend on the Au(III)/NH2 ratio, as shown in the top line (solid) of Figure 18.14. All of the observations are consistent. The particles of the r M-measured sizes have nanoparticle plasmon resonances in the region of the absorption maxima shown in the spectra in Figure 18.13. The Au(III)/NH2 ratio is a measure of the spatial concentration of Au(lll)... 

In the second section of this chapter we want to introduce briefly the physics of metal-nanoparticle plasmons, their damping mechanisms, and give an overview of typical time constants of scattering processes involved in the dissipation of the particle plasmon energy. In the third section a brief listing of theoretical models describing the fluorescence of dipoles in front of metallic nanostructures will be given, as well as basic considerations how to interpret experimental data. In the fourth section we want to exemplarily discuss recently performed experiments, where Lissamine molecules have... 

Enhancement of the decay rate by photon emission is achieved as Eemi is exciting the oscillation of the nanoparticle plasmon, which in turn emits Ere/ that sums up to Eemi to give and enhanced Etot and, in turn, Prad-... 

Y.A. Akimov, W.S. Koh, K. Ostrikov, Enhancement of optical absorption in thin-film solar cells through the excitation of higher-order nanoparticle plasmon modes. Opt. Exp. 7 (2009) 10195-10205. 

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