Hot Adsorbate-Induced Retardation of the Internal Thermalization of Nonequilibrium Electrons in Adsorbate-Covered Metal Nanoparticles
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چکیده
منابع مشابه
Hot adsorbate-induced retardation of the internal thermalization of nonequilibrium electrons in adsorbate-covered metal nanoparticles.
Femtosecond transient absorption spectroscopy has been used to investigate the electron-electron scattering dynamics in sulfate-covered gold nanoparticles of 2.5 and 9.2 nm in diameter. We observe an unexpected retardation of the absolute internal thermalization time compared to bulk gold, which is attributed to a negative feedback by the vibrationally excited sulfate molecules. These hot adsor...
متن کاملSupporting Information Hot adsorbate-induced retardation of the internal thermalization of nonequilibrium electrons in adsorbate-covered metal nanoparticles
We use "soft" surface science approach to prepare the samples, that permit the investigation of the metal/molecule interface by transient absorption spectroscopy. The overall structure of the sample consists of a mesoporous nanostructured metal oxide film, that acts as a host for the adsorbate-covered metal nanoparticles (see Fig. S1). The three dimensional nanostructured samples were prepared ...
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Diffusion of adsorbates on transition metal nanoparticles is a precursor process for heterogeneously catalyzed reactions, and as a result, an atomistic understanding of the diffusion mechanism is very important. We systematically studied adsorption and diffusion of atomic and diatomic species (H, C, N, O, CO, and NO) on nanometer-sized Pt and Cu nanoparticles with different sizes and shapes usi...
متن کاملStructure of Bare and Adsorbate-Covered GaN(0001) Surfaces
A review of surface structures of bare and adsorbate-covered GaN (0001) and (0001) surfaces is presented, including results for In, Mg, Si, and H adsorbates. Emphasis is given to direct determination of surface structure employing experimental techniques such as scanning tunneling microscopy, electron diffraction, and Auger spectroscopy, and utilizing first principles computations of the total ...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2006
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp060179l