期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 89, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5046846
关键词
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资金
- Austrian Science Fund FWF (Wittgenstein Prize Project) [Z 250-N27]
- Doctoral College Solids4Fun [W1243-N16]
- European Research Council (ERC) advanced grant Oxide Surfaces [ERC-2011-ADG-20110209]
- Austrian Science Fund (FWF) [W1243] Funding Source: Austrian Science Fund (FWF)
The structure of the solid-liquid interface often defines the function and performance of materials in applications. To study this interface at the atomic scale, we extended an ultrahigh vacuum (UHV) surface-science chamber with an apparatus that allows bringing a surface in contact with ultrapure liquid water without exposure to air. In this process, a sample, typically a single crystal prepared and characterized in UHV, is transferred into a separate, small chamber. This chamber already contains a volume of ultrapure water ice. The ice is at cryogenic temperature, which reduces its vapor pressure to the UHV range. Upon warming, the ice melts and forms a liquid droplet, which is deposited on the sample. In test experiments, a rutile TiO2(110) single crystal exposed to liquid water showed unprecedented surface purity, as established by X-ray photoelectron spectroscopy and scanning tunneling microscopy. These results enabled us to separate the effect of pure water from the effect of low-level impurities present in the air. Other possible uses of the setup are discussed. (C) 2018 Author(s).
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