Direct visualization of quasi-ordered oxygen chain structures on Au(110)-(1 × 2)
| Autor: | Matthew M. Montemore, Fanny Hiebel, Efthimios Kaxiras, Cynthia M. Friend |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces Electronic structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oxygen 0104 chemical sciences Surfaces Coatings and Films law.invention Crystallography Adsorption Chain (algebraic topology) Catalytic oxidation law Materials Chemistry Density functional theory Gold surface Scanning tunneling microscope 0210 nano-technology |
| Zdroj: | Surface Science. 650:5-10 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2015.09.018 |
| Popis: | The Au(110) surface offers unique advantages for atomically-resolved model studies of catalytic oxidation processes on gold. We investigate the adsorption of oxygen on Au(110) using a combination of scanning tunneling microscopy (STM) and density functional theory (DFT) methods. We identify the typical (empty-states) STM contrast resulting from adsorbed oxygen as atomic-sized dark features of electronic origin. DFT-based image simulations confirm that chemisorbed oxygen is generally detected indirectly, from the binding-induced electronic structure modification of gold. STM images show that adsorption occurs without affecting the general structure of the pristine Au(110) missing-row reconstruction. The tendency to form one-dimensional structures is observed already at low coverage ( 2 leaves a clean and ordered gold surface. |
| Databáze: | OpenAIRE |
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