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 –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 pressures where impurity-related structures were observed.
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September 2001
Research Article|
September 01 2001
A high-pressure scanning tunneling microscope
E. Laegsgaard;
E. Laegsgaard
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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L. Österlund;
L. Österlund
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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P. Thostrup;
P. Thostrup
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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P. B. Rasmussen;
P. B. Rasmussen
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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I. Stensgaard;
I. Stensgaard
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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F. Besenbacher
F. Besenbacher
CAMP and Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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Rev. Sci. Instrum. 72, 3537–3542 (2001)
Article history
Received:
April 20 2001
Accepted:
June 05 2001
Citation
E. Laegsgaard, L. Österlund, P. Thostrup, P. B. Rasmussen, I. Stensgaard, F. Besenbacher; A high-pressure scanning tunneling microscope. Rev. Sci. Instrum. 1 September 2001; 72 (9): 3537–3542. https://doi.org/10.1063/1.1389497
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