Structural Evolution of Gas-Phase Coinage Metal Clusters in Thiolate Self-Assembled Monolayers on Au
| Autor: | Leena-Sisko Johansson, Jennifer T. Joyce, Jyrki Räisänen, Minna T. Räisänen, Joseph Campbell, Christophe Silien, Leila Costelle |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Chemistry
Molecular electronics Self-assembled monolayer 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Structural evolution 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Spherical geometry Crystallography General Energy X-ray photoelectron spectroscopy law Monolayer Physical and Theoretical Chemistry Scanning tunneling microscope 0210 nano-technology Metal clusters |
| Zdroj: | The Journal of Physical Chemistry C. 116:22602-22607 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp307148p |
| Popis: | Metallization of organic surfaces is important especially for applications in molecular electronics. It can be realized by different means, one promising albeit less studied method being gas-phase deposition of metal clusters. Here, we report on the interactions of gas-phase Cu, Ag, and Au clusters with n-dodecanethiolate self-assembled monolayers (SAMs) on Au substrate. The morphology and composition of the deposited clusters and their impact on the interface structure of the SAM/Au substrate were investigated using scanning tunneling microscopy. The chemical and physical interactions between the clusters and thiolates were characterized using X-ray photoelectron spectroscopy. The Au clusters are found to penetrate through the monolayer as a whole and partially retain their spherical geometry, whereas atom-by-atom diffusion and/or defect-mediated penetration are proposed for the Cu and Ag clusters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|