کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423545 | 1507941 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure of Epitaxial Layers of KCl on Ag(100) Structure of Epitaxial Layers of KCl on Ag(100)](/preview/png/5423545.png)
We investigated the epitaxial growth of thin KCl films on Ag(100) by spot-profile-analysis low energy electron diffraction (SPA-LEED) and scanning tunnelling microscopy (STM). The structural relation of the (100)-oriented KCl film with respect to the Ag(100) surface is incommensurate, nevertheless the structural quality is very high and terraces with an average diameter of 250Â Ã are obtained. The unit cells of KCl and Ag(100) are aligned, and there is no rotational mosaicity as present in the case of NaCl on Ag(100). We attribute this to a small interaction between KCl and Ag(100) and growth starting at step edges of the metal substrate. In order to demonstrate the high structural quality of the KCl films, we deposited a monolayer of perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA) on these films. We obtained the identical monolayer structure that was observed earlier on bulk KCl. We thus suggest that KCl/Ag(100) is ideal for surface experiments on thin dielectric films.
Research highlights⺠Thin KCl films of high structural quality on Ag(100). ⺠Incommensurate growth with aligned unit cells. ⺠High mobility of KCl molecules leads to step nucleation growth. ⺠Electron based experiments are possible on these films. ⺠PTCDA monolayers form a brickwall structure on the films.
Journal: Surface Science - Volume 605, Issues 11â12, June 2011, Pages 1090-1094