Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Electron-stimulated desorption of potassium atoms adsorbed on the surface of gold

Yu.A. Kuznetsov, M.N. Lapushkin

Ioffe Institute

DOI: 10.26456/pcascnn/2020.12.836

Original article

Abstract: An ultrathin intermetallic layer KxAuy was created at room temperature by depositing potassium atoms on adsorbed gold layer on the tungsten surface. The processes of electron-stimulated desorption of K atoms from the KxAuy surface are investigated. Quasi-resonance peaks are found in the dependence of the ESD yield on the excitation energy at 64 and 82 eV, which correspond to the excitation of the core levels Au 5p3/2 and Au 5p1/2. The obtained results indicate the formation KxAuy of different stoichiometry: from KAu8 to KAu. It is shown that the intermetallic compound KxAuy created at room temperature is a semiconductor, as it was previously obtained at 1000 K. A model of electron-stimulated desorption of K atoms in the K / KxAuy / Au / W system is proposed

Keywords: electron-stimulated desorption, adsorption, alkali metals, gold, intermetallic compounds

  • Yurij A. Kuznetsov – Researcher, Ioffe Institute
  • Mikhail N. Lapushkin – Ph. D., Docent, Ioffe Institute

Reference:

Kuznetsov, Yu.A. Electron-stimulated desorption of potassium atoms adsorbed on the surface of gold / Yu.A. Kuznetsov, M.N. Lapushkin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2020. — I. 12. — P. 836-844. DOI: 10.26456/pcascnn/2020.12.836. (In Russian).

Full article (in Russian): download PDF file

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