Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany.
J Am Chem Soc. 2011 Jun 22;133(24):9208-11. doi: 10.1021/ja2025855. Epub 2011 May 31.
The competition between intermolecular interactions and lateral variations in the molecule-substrate interactions has been studied by scanning tunneling microscopy (STM), comparing the phase formation of (sub)monolayers of the organic molecule 2,4'-BTP on buckled graphene/Ru(0001) and Ag(111) oriented thin films on Ru(0001). On the Ag films, the molecules form a densely packed 2D structure, while on graphene/Ru(0001), only the areas between the maxima are populated. The findings are rationalized by a high corrugation in the adsorption potential for 2,4'-BTP molecules on graphene/Ru(0001). These findings are supported by temperature programmed desorption (TPD) experiments and theoretical results.
通过扫描隧道显微镜（STM）研究了分子间相互作用与分子-衬底相互作用的横向变化之间的竞争，比较了有机分子 2,4'-BTP 的（亚）单层在褶皱石墨烯/Ru(0001)和 Ru(0001)取向的 Ag(111)薄膜上的相形成。在 Ag 薄膜上，分子形成了密集的二维结构，而在石墨烯/Ru(0001)上，只有在最大值之间的区域才有分子存在。这些发现可以通过在石墨烯/Ru(0001)上 2,4'-BTP 分子的吸附势的高起伏来解释。这些发现得到了温度程序脱附（TPD）实验和理论结果的支持。
