IR wavelength-selective laser desorption via O H and C H stretching modes
We present new results on wavelength-selective desorption of solid samples using the resonant interaction between the laser beam and the bulk. The experimental set-up is based on the coupling of three techniques: laser desorption in the near-infrared (IR) (2.7–4 μm) with a tunable IR optical paramet...
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Published in | Applied surface science Vol. 253; no. 3; pp. 1090 - 1094 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
30.11.2006
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Subjects | |
Online Access | Get full text |
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Summary: | We present new results on wavelength-selective desorption of solid samples using the resonant interaction between the laser beam and the bulk. The experimental set-up is based on the coupling of three techniques: laser desorption in the near-infrared (IR) (2.7–4
μm) with a tunable IR optical parametric oscillator (OPO), UV multi-photon ionization, and reflectron time-of-flight mass spectrometry. The resonant character of the laser desorption process has been investigated for an ice/polycyclic aromatic hydrocarbon (PAH) mixture, by excitation of the O
H and C
H stretching modes. Highly preferential desorption has been evidenced, with exclusive desorption of water and PAH molecules at the O
H and C
H resonances, respectively. Potential analytical (e.g. selective analysis of complex samples) and technological (e.g. dry laser cleaning, DLC) applications are discussed. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0169-4332 1873-5584 |
DOI: | 10.1016/j.apsusc.2006.01.082 |