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Updated: Mar 21, 2026
08:53
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
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Dual analyzer system for surface analysis dedicated for angle-resolved photoelectron spectroscopy at liquid surfaces
Inga Niedermaier1, Claudia Kolbeck1, Hans-Peter Steinrück1
1Lehrstuhl für Physikalische Chemie II, FAU Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany.
The Review of Scientific Instruments
|May 2, 2016
Summary
Researchers developed a new Dual Analyzer System for Surface Analysis (DASSA) for studying liquid surfaces. This system allows detailed molecular-level analysis of thicker, non-volatile liquid samples using angle-resolved X-ray Photoelectron Spectroscopy (ARXPS).
Area of Science:
- Surface Science
- Materials Science
- Physical Chemistry
Background:
- Investigating liquid surfaces using ultra-high vacuum (UHV) techniques faces challenges with liquid evaporation.
- Ionic liquids (ILs) with low vapor pressure enable new surface science studies.
- Previous angle-resolved X-ray Photoelectron Spectroscopy (ARXPS) studies were limited to thin liquid films due to sample tilting.
Purpose of the Study:
- To introduce a novel system for analyzing macroscopic liquid samples under UHV conditions.
- To enable advanced surface analysis techniques on liquids without sample tilting.
- To expand the scope of molecular-level investigations at liquid interfaces.
Main Methods:
- Development of the Dual Analyzer System for Surface Analysis (DASSA).
- Simultaneous measurements using two electron analyzers at 0° and 80° emission angles.
- Application of ARXPS, UV photoelectron spectroscopy, imaging XPS, and low-energy ion scattering.
Main Results:
- DASSA enables fast ARXPS on the horizontal surface of macroscopically thick, non-volatile liquids.
- The system overcomes limitations of previous methods requiring sample tilting.
- Demonstrated capability for detailed surface and interface analysis of liquid systems.
Conclusions:
- The DASSA system represents a significant advancement for surface science studies of liquids.
- It allows for unprecedented molecular-level insights into liquid interfaces.
- Opens new avenues for research on ionic liquids and other non-volatile liquid systems.
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