Huber, F. and Matencio, S. and Weymouth, A. J. and Ocal, C. and Barrena, E. and Giessibl, F. J. (2015) Intramolecular Force Contrast and Dynamic Current-Distance Measurements at Room Temperature. PHYSICAL REVIEW LETTERS, 115 (6): 066101. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Scanning probe microscopy can be used to probe the internal atomic structure of flat organic molecules. This technique requires an unreactive tip and has, until now, been demonstrated only at liquid helium and liquid nitrogen temperatures. We demonstrate intramolecular and intermolecular force contrast at room temperature on PTCDA molecules adsorbed on a Ag/Si(111)-(root 3 x root 3) surface. The oscillating force sensor allows us to dynamically measure the vertical decay constant of the tunneling current. The precision of this method is increased by quantifying the transimpedance of the current to voltage converter and accounting for the tip oscillation. This measurement yields a clear contrast between neighboring molecules, which we attribute to the different charge states.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPY; ATOMIC-FORCE; SINGLE-MOLECULE; SURFACE; BARRIER; IDENTIFICATION; INTERFACES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 Jun 2019 11:18 |
| Last Modified: | 18 Jun 2019 11:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5043 |
Actions (login required)
 |
View Item |
