TY - JOUR
T1 - Atom dynamics on Pt, Ir and Cu surfaces
T2 - An experimental study using various techniques
AU - Tsong, Tien T.
AU - Chen, Chonglin
AU - Fu, Tsu Yi
AU - Tzeng, Yi Ren
PY - 1996/4
Y1 - 1996/4
N2 - Some metallic adsorbed atoms on fcc metal surfaces can exchange with substrate atoms well below the room temperature. For homogeneous systems, the atomic exchange is a mechanism for self-diffusion. For heterogeneous systems, it is a mechanism for point alloy formation of only the top surface layer but it will also induce self-diffusion. We present experimental evidence found from FIM, HREELS and LEIS studies. These experiments and their relations to available theories and molecular dynamic simulations of this phenomenon are also mentioned. In addition, we present evidence for the ascending motion of step edge atoms to the upper terrace for the Ir (111) surface, and the result of a measurement of the potential barrier height of the ascending motion and the dissociation energy of step edge atoms to the lower terrace.
AB - Some metallic adsorbed atoms on fcc metal surfaces can exchange with substrate atoms well below the room temperature. For homogeneous systems, the atomic exchange is a mechanism for self-diffusion. For heterogeneous systems, it is a mechanism for point alloy formation of only the top surface layer but it will also induce self-diffusion. We present experimental evidence found from FIM, HREELS and LEIS studies. These experiments and their relations to available theories and molecular dynamic simulations of this phenomenon are also mentioned. In addition, we present evidence for the ascending motion of step edge atoms to the upper terrace for the Ir (111) surface, and the result of a measurement of the potential barrier height of the ascending motion and the dissociation energy of step edge atoms to the lower terrace.
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U2 - 10.1142/S0218625X96002278
DO - 10.1142/S0218625X96002278
M3 - Review article
AN - SCOPUS:0038123551
VL - 3
SP - 1259
EP - 1269
JO - Surface Review and Letters
JF - Surface Review and Letters
SN - 0218-625X
IS - 2
ER -