Metal-assisted etching is initiated by hole injection from an oxidant catalyzed by a metal nanoparticle or film on a Si surface. It is shown that the electronic structure of the metal/Si interface, i.e., band bending, is not conducive to diffusion of the injected hole away from the metal in the case of Ag or away from the metal/Si interface in the cases of Au, Pd, and Pt. Since holes do not dif...

Metal nanoparticles have been investigated as an efficient method to enhance the light absorption in thin film solar cell due to the surface plasmonic scattering. In this paper, we studied the light trapping by modifying the common silicon-nanoparticle-dielectric-back reflector structure. We reported the short circuit current (Jsc) enhancement of a two-layer nanoparticle structure, coated with ...

Nanoparticle-mediated intervalence transfer was reported with ferrocene moieties that were attached onto the ruthenium nanoparticle surface by ruthenium-carbene pi bonds. The resulting particles exhibited two pairs of voltammetric waves with a potential spacing of about 200 mV and a rather intense absorption peak in the near-infrared range (approximately 1930 nm) at mixed valence. Both features...

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The strong field localization generated between closely placed metal particles excited by electromagnetic radiation induces intense forces on small polarizable objects. In this study we investigate the optical forces that can be generated in the vicinity of metal nanoparticle clusters using fully electrodynamic numerical simulations. The influence of the cluster configuration as well as of the ...

Assembly pathways of virus-like particles formed from a virus coat protein cage encapsulating a metal nanoparticle were studied by intrinsic fluorescence quenching. Depending on buffer conditions, the in vitro formation of a virus-like particle can take place through cooperative or non-cooperative adsorption of protein subunits on the nanoparticle template. Simple equilibrium models provided es...

We show the possibility of simultaneously aligning molecules and focusing their center-of-mass motion near a metal nanoparticle in the field intensity gradient created by the surface plasmon enhancement of incident light. The rotational motion is described quantum mechanically while the translation is treated classically. The effects of the nanoparticle shape on the alignment and focusing are e...

The ultrafast nonlinear optical response of a single metal nanoparticle is investigated by combining a high-sensitivity femtosecond pump-probe setup with a spatial modulation microscope. Experiments are performed on 20 and 30 nm silver nanospheres, in situ characterized via their optical linear extinction spectrum. The measured transient response permits investigation of the electron-phonon ene...