Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5421978 | Surface Science | 2015 | 4 Pages |
Abstract
We study the differential reactivity of alkanethiols with submonolayers of Au on Si(111), where the surface is a mixture of the Au-rich 3Ã3 structure and the Au-poor 5Â ÃÂ 2 structure. We expose these binary 2D alloy samples to alkanethiols, while monitoring the induced spatial and structural transformations in real time using a low energy electron microscope (LEEM). Energy-dependent diffraction measurements show that, surprisingly, there is no alkanethiol growth on the Au submonolayers. Instead, S-Si interactions induce a disproportionation of the 5Â ÃÂ 2 structure into the unexpectedly inert 3Ã3 phase and a Au-depleted phase. We show how this process can be used to reduce the dimensionality of a 2D electron system to 1D.
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Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
J. Kautz, V.A.E.C. Janssen, R.M. Tromp, S.J. van der Molen,