METHOD FOR MEASURING THE MELTING TEMPERATURE OF GOLD NANOCLUSTERS ON SUBSTRATE SURFACES

摘要

Results are reported from a study of low-energy electron scattering on Au nanoclusters on substrates of amorphous SiO_2 film and polycrystalline Ni at room temperature. When the height of the Au nanoclusters is reduced from 5 to 1 nm, their melting temperature is found to decrease from 1337 K (metallic gold) to 500 K. A simple method is proposed for measuring the thermodynamic characteristics (melting temperature and Debye temperature) of metallic nanoclusters on substrate surfaces.