| AVS 60th International Symposium and Exhibition | |
| Surface Science | Wednesday Sessions |
| Session SS+AS+NS+SP-WeA |
| Session: | Single Molecules at Surfaces: Structure and Dynamics |
| Presenter: | J.W. Ossowski, Jagiellonian University, Poland |
| Authors: | J.W. Ossowski, Jagiellonian University, Poland J. Rysz, Jagiellonian University, Poland A. Terfort, Goethe University, Germany P. Cyganik, Jagiellonian University, Poland |
| Correspondent: | Click to Email |
The stability of chemical bonding between molecule and substrate is one of the key factor considering diverse applications of Self-Assembled Monolayers (SAMs). Addressing this issue experimentally or theoretically is difficult considering complex interplay of the molecule-substrate and molecule-molecule interactions in SAMs. So far most of experiments have been performed for thiol based SAMs on Au(111) substrate and far less is known for equally important Ag(111) substrate.
In this presentation we report exchange and desorption experiments probing the effect of S to Se substitution on stability of molecule-substrate interface in SAMs on Ag(111) substrate by using two homologue series of molecules in the form BPnS/Ag(111) (CH3-(C6H4)2-(CH2)n-S-Ag, n = 2-6) and BPnSe/Ag(111) (CH3-(C6H4)2-(CH2)n-Se-Ag, n =2-6).1 Such experiments were possible since both analogs form similar structures on Ag(111) substrate2 and thus observed differences in stability between these two types of SAMs could be related to the molecule-substrate interface stability. Quantitative control of the exchange process was obtained using IRRAS (Infrared Reflection Absorption Spectroscopy). Additionally, ion-induced desorption experiments by means of SIMS (Secondary Ion Mass Spectrometry) were performed. Obtained results will be discussed together with analogical experiments3-5 performed previously for Au(111) substrate enabling comparison of molecule substrate-interface stability for thiol and selenol based SAMs on Ag(111) and Au(111) substrates.
References
(1) J. Ossowski, P. J. Rysz, A. Terfort and P. Cyganik in preparation.
(2) T. Weidner, A. Schaporenko, J. Muller, M. Schmid, P. Cyganik, et al. J. Phys. Chem. C 2008, 112, 12495.
(3) K. Szelagowska-Kunstman, P. Cyganik, et al. Phys. Chem. Chem. Phys.2010, 12, 4400.
(4) F. Vervaecke, S. Wyczawska, P. Cyganik, et al. ChemPhysChem(Communication)2011, 12, 140. (5) S. Wyczawska, P. Cyganik, A. Terfort, P. Lievens, ChemPhysChem(Communication)2011, 12, 2554.