[20p-PB1-1~13] 6.5 Surface Physics, Vacuum

[20p-PB1-13] Thermal stability of nanostructures formed on Pd (111) surfaces by Ar⁺ ion bombardment

〇Masaki Harada¹, Hama Naoki¹, Yokota Yukie¹, Watanabe Kazuo¹ (1.Tokyo Univ. of sci.)

Keywords:Ar, Pd(111), TPD

By Ar⁺ ion bombardment on the Pd (111) single crystal surface, Ar atoms are aggregated in the subsurface, whereby a surface with a mound-like structure of nanometer order can be formed.This surface exhibits different catalytic activity than the flat Pd (111) surface. In this study, temperature-programmed desorption (TPD) spectra of the stored Ar atoms were measured with respect to the annealing time at 550 K in order to investigate the thermal stability of the surface nanostructures at elevated temperatures. As a result, it was revealed that the TPD peak intensity of the stored Ar atom is sufficiently maintained even at least after 10 hours.