| AVS 54th International Symposium | |
| Nanometer-scale Science and Technology | Monday Sessions |
| Session NS-MoM |
| Session: | Nanoscale Assembly and Manipulation I |
| Presenter: | M. Dong, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark |
| Authors: | W. Xu, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark M. Dong, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark H. Gersen, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark E. Rauls, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark T. Linderoth, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark F. Besenbacher, Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Denmark |
| Correspondent: | Click to Email |
Supramolecular chemistry based on non-covalent interactions is a powerful synthetic tool for the preparation of complex molecular architectures. In particular hydrogen bonds are considered to be useful for controlling molecular self-assembly due to the reversibility, specificity, directionality, and co-operative strength of this class of interactions. The highly specific interaction between the molecules Cyanuric Acid (CA) and Melamine (M), based on three complementary hydrogen bonds, is a key structural motif in supramolecular chemistry. Here we investigate the adsorption and co-adsorption M and CA on a Au(111) surface under Ultra High Vacuum conditions using Scanning Tunneling Microscopy with submolecular resolution. In addition to the expected structure with a 1:1 CA:M ratio, we identify a novel phase with 1:3 CA:M ratio formed upon sequential deposition. The hierarchy of binding energies for homo and heteromolecular dimers as well as for the observed network structures has been evaluated through theoretical modeling by the SCC-DFTB method, rationalizing the experimental observations.