Surface and bulk diffusion of HDO on ultrathin single-crystal ice multilayers on Ru(001)
作者： Frank E. Livingston , Galen C. Whipple , Steven M. George
DOI: 10.1063/1.475600
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摘要: The kinetics of HDO surface and bulk diffusion on ultrathin (25–192 BL; 90–700 A) single-crystal H216O ice multilayers were studied using a combination laser-induced thermal desorption (LITD) probing isothermal depth-profiling. hexagonal grown epitaxially Ru(001) metal substrate with the basal (001) facet parallel to surface. multilayer was not observed within resolution LITD experiment at T=140 K. These experiments yielded an upper limit coefficient Ds⩽1×10−9 cm2/s coefficients measured along c axis crystal which is perpendicular plane. diffuse readily into underlying multilayer. ranged from D=2.2(±0.3)×10−16 cm2/s D=3.9(±0.4)×10−14 cm2/s over ...
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