A high-pressure scanning tunneling microscope
| Autor: | Ivan Stensgaard, Lars Österlund, P B Rasmussen, E. Lægsgaard, Flemming Besenbacher, P. Thostrup |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 72:3537-3542 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1389497 |
| Popis: | We present the design and performance of a high-pressure scanning tunneling microscope (HP–STM), which allows atom-resolved imaging of metal surfaces at pressures ranging from ultrahigh vacuum (UHV) to atmospheric pressures (1×10−10–1000 mbar) on a routine basis. The HP–STM is integrated in a gold-plated high-pressure cell with a volume of only ∼0.5 l, which is attached directly to an UHV preparation/analysis chamber. The latter facilitates quick sample transfer between the UHV chamber and the high-pressure cell, and allows for in situ chemical and structural analysis by a number of analytical UHV techniques incorporated in the UHV chamber. Reactant gases are admitted to the high-pressure cell via a dedicated gas handling system, which includes several stages of gas purification. The use of ultrapure gasses is essential when working at high pressures in order to achieve well-defined experimental conditions. The latter is demonstrated in the case of H/Cu(110) at atmospheric H2 pressures where impurity-rela... |
| Databáze: | OpenAIRE |
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