Epitaxial electrodeposition of thallic oxide on single crystal gold

Thin films of thallic oxide Tl2O3 (Ia3, a = 1.0534 nm) were electrodeposite d on the three low-index surfaces of single crystal Au (Fm3m, a = 0.4079 nm ). Epitaxial films of Tl2O3 with a strong out-of-plane (100) texture were o btained in the case of the (100) and (111) Au substrates, while the film on the (110) Au substrate did not show a preferred out-of-plane orientation. Studies of the in-plane orientation of the films revealed that the large la ttice mismatch between Au and Tl2O3 is accommodated by the formation of the coincidence lattices on (100) and (111) Au. (C) 2000 Elsevier Science Ltd. All rights reserved.