Nano-Bio-Physics

Investigating Ions Using Superfluid Helium Nanodroplets

The main focus of this group is the analysis of various ionic molecules and clusters embedded in charged superfluid helium nanodroplets (HNDs). With the help of HNDs, a high degree of control over the size, charge and composition of the formed ions is achieved. The unique properties of HNDs, such as ultracold temperatures and optical transparency across the infrared to ultraviolet wavelength range, also make the droplets an ideal matrix for studying the ions.

Our research focuses on:

  • Spectroscopy: With the help of the HNDs we carry out 'messenger spectroscopy' of astrophysically relevant ions as well as of photoactive (metal)organic ions.
  • Mass spectrometry: Collisions, reactions, multiple charging, solvation, etc. of various ions in the vicinity of the HNDs are investigated using mass spectrometers.
  • Deposition: Various nanoparticles can be produced with the aid of the HNDs and gently deposited on surfaces. The prepared surfaces are examined using microscopes (AFM, STM, TEM).
Laser scheint auf Probe

Paul Scheier

Professor of Experimental Physics
PhD 1988, University of Innsbruck, Austria

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Affiliations
Department of Ion Physics and Applied Physics, University of Innsbruck

Portrait Bild Paul Scheier

Paul Scheier conducts research in the field of helium nanodroplets, using them to study ions and ionic complexes through spectroscopy, mass spectrometry, and surface deposition. The research projects include national and international collaborations, for example with European XFEL, Instituto de Física Fundamental - CSIC, Prof. Olof Echt (New Hampshire), Dr. Serge Krasnokutski (Jena), Prof. Andrew Ellis (Leicester) and many others.

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