Depth Analysis of Polymer-Coated Steel Samples Using Near-Infrared Femtosecond Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Discontinued Devices LC 2002 Spatial Light Modulators
Misc.: Speckle / Characterization / Metrology Pulse Application / -Shaping
Published on:
Authors: M. Paz Mateo, Carmen C. Garcia, R. Hergenröder
Abstract:

“The viability of near-infrared femtosecond laser ablation (fs-LA) inductively coupled plasma mass spectrometry (ICPMS) for the in-depth analysis of polymer coatings over galvanized steel substrates has been studied. A good depth resolution was obtained modifying the femtosecond Gaussian beam to a flat-top beam by using a liquid-crystal display. In order to avoid mixing of information coming from successive shots, a low repetition rate was accomplished and signals were monitored shot by shot. Different kinds of coatings were used to demonstrate the capability of femtosecond ablation for depth-profiling analysis. Ablation was conducted under He atmosphere, after sample cell Ar was admixed. The depth profiles obtained by LA-ICPMS are in good agreement with those obtained by GD-OES for the three analyzed samples. In cases where due to averaging over several millimeter sample roughness determines the depth resolution of GD-OES, it was found that LA-ICPMS achieves better depth resolution due to the better lateral resolution. The depth resolution obtained by LA-ICPMS was found to be 240 nm and 2.3 μm, for a hot-dip galvanized steel (HDGS) and a polymer−polymer-coated HDGS, respectively, compared to the 2.2 and 4.5 μm achieved with GD-OES for the same samples. “

Restricted Access

Publication: Analytical Chemistry
Issue/Year: Anal. Chem., 2007, 79 (13), pp 4908–4914
DOI: 10.1021/ac070241q
Link: https://doi.org/10.1021/ac070241q

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