Direkt zum Inhalt
  • Paul Scherrer Institut PSI
  • PSI Research, Labs & User Services

Digital User Office

  • Digital User Office
  • DE
  • EN
  • FR
Paul Scherrer Institut (PSI)
Suche
Paul Scherrer Institut (PSI)

Hauptnavigation

  • Research at PSIÖffnen dieses Hauptmenu Punktes
    • Research Initiatives
    • Ethics and Research integrity
    • Scientific Highlights
    • Scientific Events
    • Scientific Career
    • PSI-FELLOW
    • PSI Data Policy
  • Research Divisions and LabsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Research with Neutrons and Muons
    • Photon Science
    • Energy and Environment
    • Nuclear Energy and Safety
    • Biology and Chemistry
    • Scientific Computing, Theory and Data
    • Large Research Facilities
  • Facilities and InstrumentsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Large Research Facilities
    • Facilities
    • PSI Facility Newsletter
  • PSI User ServicesÖffnen dieses Hauptmenu Punktes
    • User Office
    • Methods at the PSI User Facilities
    • Proposals for beam time
    • Proposal Deadlines
    • Data Analysis Service (PSD)
    • EU support programmes
  • New ProjectsÖffnen dieses Hauptmenu Punktes
    • SLS 2.0
    • IMPACT
  • DE
  • EN
  • FR

Digital User Office (mobile)

  • Digital User Office

Sie befinden sich hier:

  1. PSI Home
  2. Labs & User Services
  3. PSD
  4. SLS
  5. ISS
  6. Endstations
  7. APXPS

Sekundäre Navigation

In Situ Spectroscopy

  • User Information
    • Operation Schedule
  • People
  • Beamline Layout
  • Endstations Ausgeklappter Submenü Punkt
    • AP-XPS
    • Solid-Gas Interface Endstation
    • Solid-Liquid Endstation
    • NanoXAS Endstation
  • Scientific Highlights
  • Research
  • Publications
  • Contacts

Info message

Dieser Inhalt ist nicht auf Deutsch verfügbar.

History

X-ray Photoelectron Spectroscopy (XPS) has historically been carried out in ultra high vacuum (10-8-10-12 mbar) to prevent the inelastic scattering of photoelectrons and to operate the electron analyzers (photoelectrons extraction, focusing and detection). This has created a pressure gap, and a series of limitations in the applicability of XPS as a technique to characterize actual samples under relevant working conditions. The development of differentially pumped photoelectron spectrometers has allowed to partially fill this gap [1,2].

Diff pumped Analyzer.png


An aperture (titanium cone with aperture ranging from 0.1 to 1.0 mm) separates the experimental cell, where a gas/mixture of gases can be dosed in the mbar range, from the first differential pumping stage of the analyzer [3]. Two differential pumping stages (turbomolecular pumps) create a pressure drop from the mbar to high vacuum while pre-lenses extract and refocus the photoelectrons emitted from the sample. The third and fourth differential pumping stages create a stable high/ultrahigh vacuum in the lens, analyzer and detector regiorn. For example, while dosing 1 mbar of gas in the experimental cell, the pressure drops to 10-4-10-5 mbar in the first differential pumping stage and oscillates between 10-8 and 10-9 mbar in the detector. By means of Ambient Pressure X-ray Photoelectron Spectroscopy actual samples can be investigated in experimental conditions reproducing/mimicking the real ones.

The In Situ Spectroscopy Beamline

The In Situ Spectroscopy beamline is a modular system. The AP-electron analyzer is a ScientaOmicron R4000-Hipp-2 with four differential pumping stages.

HiPP 2.png


The detector is a multichannel plate coupled with a CCD camera. Different titanium cones (different size of the aperture and focal distance) are available and can be chosen based on the experiment and on the experimental conditions. Photoemission spectra can be acquired in fixed (or snapshot) mode or in swept mode. Real-time processing of the experimental data is possible, loading the data in the scientific data analysis software. Two experimental chambers are available and can be connected to the electron analyzer:
  • Solid-gas interface endstation. In-situ investigation/characterization of the solid-gas and of the solid-vapor interface. Catalysis, Environmental Chemistry, Surface Chemistry.
  • Solid-liquid interface chamber. In-situ investigatio/characterization of the solid-liquid, of the solid-vapor and of the solid-gas interface. Electrochemistry, Electrocatalysis, Environmental Chemistry, Catalysis, Surface Science.

References

[1] M. Salmeron, R. Schloegl, Surf. Sci. Rep. 2008, 63, 169-199.

[2] D. E. Starr, Z. Liu, M. Hävecker, A. Knop-Gericke, H. Bluhm, Chem. Soc. Rev. 2013, 42, 5833-5857.

[3] K. Roy, L. Artiglia, J. A. van Bokhoven ChemCatChem 2018, 10, 662-682.

Mit Sidebar

Partners and Collaborators

This project is a collaboration between EMPA, PSI, and University of Erlangen-Nuremberg
logo empa.gif

PSI logo.png

FAU logo2.png


User Contact Points at PSI

PSI User Office
DUO Login

Call for Proposals

PX Beamlines: Call is open for proposals
More Information

All other Beamlines
08 February 2020: Call is open for proposals
More Information

Upcoming Events

Get a list of upcoming scientific conferences and seminars

PSI User Facilities Newsletter

Current News from PSI photon, neutron and muon user facilities
top

Fussbereich

Paul Scherrer Institut

Forschungsstrasse 111
5232 Villigen PSI
Schweiz

Telefon: +41 56 310 21 11
Telefax: +41 56 310 21 99

Der Weg zu uns
Kontakt

Besucherzentrum psi forum
Schülerlabor iLab
Zentrum für Protonentherapie
PSI Bildungszentrum
PSI Guest House (in english)
PSI Gastronomie
psi forum-Shop

 

Service & Support

  • Telefonbuch
  • User Office
  • Accelerator Status
  • Publikationen des PSI
  • Lieferanten
  • E-Rechnung
  • Computing
  • Sicherheit

Karriere

  • Arbeiten am PSI
  • Stellenangebote
  • Aus- und Weiterbildung
  • Career Center
  • Berufsbildung
  • PSI Bildungszentrum

Für die Medien

  • Das PSI in Kürze
  • Zahlen und Fakten
  • Mediacorner
  • Medienmitteilungen
  • Social Media

Folgen Sie uns: Twitter (deutsch) LinkedIn Youtube Facebook Instagram Issuu RSS

Footer legal

  • Impressum
  • Nutzungsbedingungen
  • Editoren-Login