About us

RNDr. Zdeněk Weiss, CSc.

Employee function
Head of Laboratory
Telephone
+420 266 05 2870, +420 266 05 2810
E-mail
weissz [at] fzu.cz
Locality
Slovanka
Room
20
039A
Text

The laboratory is focused on the analysis of elemental composition and concentration depth profiles of metals, alloys, inorganic coatings, thin films and surface-treated materials by methods of emission spectroscopy. Most elements of the periodic table can be analyzed, including light elements H, O, N, B. Concentration ranges, precision and accuracy of the analyses depend on the element–matrix combination under study and the availability of suitable reference materials for calibration.
Glow discharge optical emission spectroscopy (GD-OES) is used for the analyses. It is a destructive method providing information about the composition, averaged over certain area on the sample. Typical depths of depth-resolved analysis range between tens of nanometers and tens of micrometers.

dep 17 - Laboratory of emission spectroscopy - The spectral source used: the Grimm lamp, a vital part of the GDA750 HR spectrometer
Description

 The spectral source used: the Grimm lamp, a vital part of the GDA750 HR spectrometer (Spectruma GmbH.)

Besides analytical applications, work is going on also on the methodology and the interpretation of GD-OES analyses and the physical processes involved. In particular, we are interested in the excitation and ionization of various elements in non-equilibrium, weakly ionized glow discharge plasmas, with links to the optical plasma diagnostics, collisional-radiative models and excitation by heavy particles (atoms and ions).

Depth profile of a Zr(FeSi) layer on zirconium, after a corrosion test in autoclave.
Description

Depth profile of a Zr(FeSi) layer on zirconium, after a corrosion test in an autoclave. Total amounts of individual elements in [mg/m2]: Si: 201, Fe: 420, H: 3.8, O: 190. The time of analysis down to the depth of 2.0 μm was 39 s.

Major scientific societies active in analytical spectroscopy and glow discharge-based methods:

European Working group for Glow Discharge Spectroscopy
Spektroskopická společnost Jana Marka Marci