Huber, Ferdinand and Berwanger, Julian and Polesya, Svitlana and Mankovsky, Sergiy and Ebert, Hubert and Giessibl, Franz J. (2019) Chemical bond formation showing a transition from physisorption to chemisorption. SCIENCE, 366 (6462). 235-+. ISSN 0036-8075, 1095-9203
Full text not available from this repository. (Request a copy)Abstract
Surface molecules can transition from physisorption through weak van der Waals forces to a strongly bound chemisorption state by overcoming an energy barrier. We show that a carbon monoxide (CO) molecule adsorbed to the tip of an atomic force microscope enables a controlled observation of bond formation, including its potential transition from physisorption to chemisorption. During imaging of copper (Cu) and iron (Fe) adatoms on a Cu(111) surface, the CO was not chemically inert but transited through a physisorbed local energy minimum into a chemisorbed global minimum, and an energy barrier was seen for the Fe adatom. Density functional theory reveals that the transition occurs through a hybridization of the electronic states of the CO molecule mainly with s-, p(z)-, and d(z)(2)-type states of the Fe and Cu adatoms, leading to chemical bonding.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ATOMIC-FORCE MICROSCOPY; ADSORPTION; RESOLUTION; SURFACE; CO; MOLECULE; ENERGY; ORDER; |
| 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: | 30 Mar 2020 05:00 |
| Last Modified: | 06 Apr 2020 06:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26009 |
Actions (login required)
 |
View Item |
