Temperature-dependent work functions of free alkali-metal nanoparticles

2019-12-20 08:20:32

function temperature work dependent Alkali

责任者: Kin Wong;Tikhonov, G.;Kresin, V.V. 单位: Dept. of Phys. & Astron., Univ. of Southern California, Los Angeles, CA, USA 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev, B, Condens, Matter Mater. Phys. (USA)),15 Sept. 2002,66(12):125401-1 摘要: Photoionization yields have been measured as a function of temperature for the alkali metals Li, Na, and K in the form of free nanometer-sized clusters in a beam. The data can be fitted very well by a finite-temperature Fowler plot, originally derived for bulk surfaces. The resulting temperature-dependent ionization thresholds match precisely the literature work function values and are, within the experimental uncertainties, in agreement with recent theoretical models for thermal shifts of the work function 关键词: lithium;metal clusters;nanostructured materials;photoionisation;potassium;sodium;work function;temperature-dependent work functions;free alkali-metal nanoparticles;photoionization yields;nanometer-sized clusters;finite-temperature Fowler plot;temperature-dependent ionization thresholds;thermal shifts;work function;Li;Na;K