| AVS 55th International Symposium & Exhibition | |
| Nanometer-scale Science and Technology | Tuesday Sessions |
| Session NS-TuP |
| Session: | Poster Session |
| Presenter: | L. Kankate, University of Bielefeld, Germany |
| Authors: | L. Kankate, University of Bielefeld, Germany H. Muzik, University of Bielefeld, Germany A. Turchanin, University of Bielefeld, Germany A. Gölzhäuser, University of Bielefeld, Germany |
| Correspondent: | Click to Email |
Self-assembled monolayers (SAMs) with aromatic moieties recently caused a particular interest due to their applications in molecular electronics,1 nanolithography2,3 and biotechnology.4 For high quality SAM-based devices and nanostructures, a reproducible fabrication of high quality SAMs is necessary. The traditional “wet” preparation of SAMs may suffer from solvent, ambient and substrate contaminations resulting in poor quality and degradation of the molecular assemblies. On the contrary, the preparation of SAMs in UHV can provide a high degree of control over the experimental parameters. We have studied the formation of 1,1’-biphenyl-4-thiol (BPT) and 4’-nitro-1,1’-biphenyl-4-thiol (NBPT) SAMs on gold surfaces by vapour deposition in UHV. The vapour deposited monolayers were characterized by mass spectrometry, X-ray photoelectron spectroscopy (XPS). and scanning tunnelling microscopy (STM). Based on this data, the deposition parameters were optimized. A comparison of vapor deposited SAMs with monolayers prepared from solution is presented.
1N.D. Lang, P.M. Solomon, Nano Letters 5 (2005) 921;
2A. Gölzhäuser, W. Geyer, V. Stadler, W. Eck, M. Grunze, K. Edinger, Th. Weimann, P. Hitze, J.Vac.Sci.Technol. B 18 (2000) 3414;
3A. Turchanin, M. Schnietz, M. El-Desawy, H.H. Solak, C. David, A. Gölzhäuser, Small 3 (2007) 2114;
4A. Turchanin, A. Tinazli, M. El-Desawy, H. Großmann, M. Schnietz, H.H. Solak, R. Tampé, A. Gölzhäuser, Adv. Mater. 20 (2008) 471.