STM investigations of C6Br6 on HOPG and MoS2

• Published in: Surface science Vol. 318; no. 1-2; pp. L1181 - L1185
• Main Authors: Strohmaier, R., Ludwig, C, Petersen, J., Gompf, B., Eisenmenger, W.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 10.10.1994; Amsterdam Elsevier Science; New York, NY
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Molecular, atomic, ion, and chemical beam epitaxy; Physics; Solid surfaces and solid-solid interfaces; Surface structure and topography; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin films; Incommensurate phases; Molecular beam epitaxy; Overlayers; Experimental study; STM; Organic compounds; Surface structure
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/0039-6028(94)90335-2

Monolayers of the organic molecule hexabromobenzene on HOPG and MoS2 have been imaged with scanning tunneling microscopy. The flat lying molecules form an ordered close-packed array with unit cell parameters corresponding to their van der Waals radii. In both cases the overlayers are incommensurable to the substrate. In the images with submolecular resolution, the molecules appear different on the two substrates. On HOPG the observed STM image contrast shows a detailed submolecular pattern depending on the tunneling voltage, whereas on MoS2 the molecules appear with a less pronounced inner structure. Neither on HOPG nor on MoS2 the observed submolecular contrast depends on the adsorption site.