Photon emission spectroscopy of single oxide-supported Ag-Au alloy clusters
作者： W. Benten , N. Nilius , N. Ernst , H.-J. Freund
DOI: 10.1103/PHYSREVB.72.045403
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摘要: The alloying of Ag and Au has been investigated on the level individual clusters by analyzing light emission excited electron injection from an STM tip. Different Ag-Au alloy shell-core have prepared at room temperature a thin ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ film NiAl(110) simultaneous successive deposition both noble metals. For deposition, one Mie-plasmon resonance detected with wavelength position shifting pure to value increasing content. results are in agreement calculations based Mie theory indicating complete mixing materials. two resonances observed, attributed plasmon excitations shell core clusters. Comparing these model calculations, considerable intermixing materials is concluded, which especially strong shell-Ag
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