TY - JOUR
T1 - Growth mechanism of Ni on Pt(110) at low temperature
AU - Shern, C. S.
AU - Tsay, J. S.
AU - Fu, Tsu Yi
N1 - Funding Information:
This work was supported by the National Science Council of ROC under Grant No. NSC 82-0208-M-003-020 and No. NSC 83-0208-M-003-012.
PY - 1996/2
Y1 - 1996/2
N2 - Ni atoms deposited on Pt(110)-(1 × 1) and (1 × 2) surfaces are studied and compared at 130 K. The Auger uptake curve of Ni on the Pt(110)-(1 × 1) surface shows an exponential-type growth. The intensities of all (1 × 1) LEED spots decrease gradually and exhibit no oscillation during the deposition. These results demonstrate that this growth follows the Volmer-Weber mode. On the other hand, the Auger uptake curve of Ni on the Pt(110)-(1 × 2) surface shows a premonolayer break with an initial linear growth. The LEED pattern changes from (1 × 2) to a pseudo-(1 × 1) after Ni atoms fill the sites of the missing rows. After that, the Auger uptake curve turns to an exponential-type and the LEED spot patterns all diminish gradually when more Ni atoms are deposited on the Pt(110)-(1 × 2) surface. These results demonstrate that the growth of Ni on the Pt(110)-(1 × 2) surface follows the Stranski-Krastanov (SK) mode. The growth mechanism is discussed by considering the lattice mismatch, diffusion, and the surface free energies of the adsorbate and the substrate.
AB - Ni atoms deposited on Pt(110)-(1 × 1) and (1 × 2) surfaces are studied and compared at 130 K. The Auger uptake curve of Ni on the Pt(110)-(1 × 1) surface shows an exponential-type growth. The intensities of all (1 × 1) LEED spots decrease gradually and exhibit no oscillation during the deposition. These results demonstrate that this growth follows the Volmer-Weber mode. On the other hand, the Auger uptake curve of Ni on the Pt(110)-(1 × 2) surface shows a premonolayer break with an initial linear growth. The LEED pattern changes from (1 × 2) to a pseudo-(1 × 1) after Ni atoms fill the sites of the missing rows. After that, the Auger uptake curve turns to an exponential-type and the LEED spot patterns all diminish gradually when more Ni atoms are deposited on the Pt(110)-(1 × 2) surface. These results demonstrate that the growth of Ni on the Pt(110)-(1 × 2) surface follows the Stranski-Krastanov (SK) mode. The growth mechanism is discussed by considering the lattice mismatch, diffusion, and the surface free energies of the adsorbate and the substrate.
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U2 - 10.1016/0169-4332(95)00206-5
DO - 10.1016/0169-4332(95)00206-5
M3 - Article
AN - SCOPUS:0030562138
VL - 92
SP - 74
EP - 78
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -