Orthogonal Intermolecular Interactions of CO Molecules on a One-Dimensional Substrate
| Autor: | Hrvoje Petek, Min Feng, Jin Zhao, Chungwei Lin |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Annual Review of Physical Chemistry. 63:201-224 |
| ISSN: | 1545-1593 0066-426X |
| Popis: | By low-temperature scanning tunneling microscopy, we study CO molecule chemisorption on a quasi–one-dimensional Cu(110)-(2×1)-O surface. Atom-resolved images reveal how the interaction of CO with the surface Cu-O- chains gives rise to orthogonal attractive and repulsive intermolecular interactions. First-principles calculations show that CO molecules induce unprecedented lifting of the host Cu atoms by 1 Å from the Cu-O- chains, enabling the Cu-CO unit to tilt by 45° from the surface normal. Contrary to the behavior of CO on metal surfaces, this structural distortion enables unprecedented, orthogonal, short-range intermolecular dipole-dipole attraction and long-range, surface-mediated repulsion. These interactions lead to self-assembly into molecular nanograting structures consisting of arrays of single-molecule-wide CO rows. The origin of the novel behavior of CO molecules in the electronic and geometrical properties of the quasi–one-dimensional substrate suggests that similar molecule-molecule and molecule-substrate interactions could play an important role at catalytic sites on reactive surfaces. |
| Databáze: | OpenAIRE |
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