Structural isotope effect in water bilayers adsorbed on Ru(001).
Structural isotope effect in water bilayers adsorbed on Ru(001).
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DOI：
10.1103/physrevlett.74.4221
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发表时间：
1995-05
影响因子：
8.6
通讯作者：
Held;Menzel
中科院分区：
文献类型：
--
作者：
Held;Menzel
Using negligible-damage low energy electron diffraction we have found a structural isotope effect in water bilayers on Ru(001), in contrast to bulk ice where none exists. While the ${\mathrm{D}}_{2}$O bilayer forms an extended commensurate $p(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ structure with known geometry, the ${\mathrm{H}}_{2}$O bilayer is characterized by a striped domain structure 6.5 substrate lattice constants wide with essentially the same short range arrangements as for ${\mathrm{D}}_{2}$O. This unexpected isotope effect is explained by a difference in H and D bond lengths (an Ubbelohde effect) and potentials, induced by the interaction with the substrate, and a consequent difference in the misfit to the substrate lattice.
Using negligible-damage low energy electron diffraction we have found a structural isotope effect in water bilayers on Ru(001), in contrast to bulk ice where none exists. While the ${\mathrm{D}}_{2}$O bilayer forms an extended commensurate $p(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ structure with known geometry, the ${\mathrm{H}}_{2}$O bilayer is characterized by a striped domain structure 6.5 substrate lattice constants wide with essentially the same short range arrangements as for ${\mathrm{D}}_{2}$O. This unexpected isotope effect is explained by a difference in H and D bond lengths (an Ubbelohde effect) and potentials, induced by the interaction with the substrate, and a consequent difference in the misfit to the substrate lattice.