1. The ReactorSTM: Atomically resolved scanning tunneling microscopy under high-pressure, high-temperature catalytic reaction conditions.
- Author
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Herbschleb, C. T., van der Tuijn, P. C., Roobol, S. B., Navarro, V., Bakker, J. W., Liu, Q., Stoltz, D., Cañas-Ventura, M. E., Verdoes, G., van Spronsen, M. A., Bergman, M., Crama, L., Taminiau, I., Ofitserov, A., van Baarle, G. J. C., and Frenken, J. W. M.
- Subjects
CHEMICAL industry ,SCANNING tunneling microscopy ,PHOTOELECTRON spectroscopy ,ION bombardment ,SCANNING systems - Abstract
To enable atomic-scale observations of model catalysts under conditions approaching those used by the chemical industry, we have developed a second generation, high-pressure, high-temperature scanning tunneling microscope (STM): the ReactorSTM. It consists of a compact STM scanner, of which the tip extends into a 0.5 ml reactor flow-cell, that is housed in a ultra-high vacuum (UHV) system. The STM can be operated from UHV to 6 bars and from room temperature up to 600 K. A gas mixing and analysis system optimized for fast response times allows us to directly correlate the surface structure observed by STM with reactivity measurements from a mass spectrometer. The in situ STM experiments can be combined with ex situ UHV sample preparation and analysis techniques, including ion bombardment, thin film deposition, low-energy electron diffraction and x-ray photoelectron spectroscopy. The performance of the instrument is demonstrated by atomically resolved images of Au(111) and atom-row resolution on Pt(110), both under high-pressure and high-temperature conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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