IR wavelength-selective laser desorption via OH and CH stretching modes |
| |
| Institution: | 1. Laboratoire de Physique des Lasers, Atomes et Molécules (UMR 8523), Centre d’Etudes et de Recherches Lasers et Applications (FR 2416), Université de Lille 1, 59655 Villeneuve d’Ascq cedex, France;2. Laboratoire de Physico-Chimie des Processus de Combustion et de l’Atmosphère (UMR 8522), Centre d’Etudes et de Recherches Lasers et Applications, Université de Lille 1, 59655 Villeneuve d’Ascq cedex, France;3. Universitatea “Al. I. Cuza”, Facultatea de Fizica, 11 Blvd. Carol I, 700506 Iasi, Romania;1. Univ. Bordeaux, ISM, UMR 5255, F-33400 Talence, France;2. CNRS, ISM, UMR 5255, F-33400 Talence, France;3. Univ. Bordeaux, LAB, UMR 5804, F-33270 Floirac, France;4. CNRS, LAB, UMR 5804, F-33270 Floirac, France;1. Department of Chemistry, Memorial University, St. John’s, NL, A1B 3X7, Canada;2. LAMBE, Université Evry Val d’Essonne, CEA, CNRS, Université Paris-Saclay, F-91025, Evry, France;3. LAMBE, Université Cergy-Pontoise, Université Paris-Seine, F-91025, Evry, France;1. Department of Chemistry, University of Utah, 315 S. 1400 E. Room 2020, Salt Lake City, UT, 84112, United States;2. Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, the Netherlands;1. Institute of Electronics, Bulgarian Academy of Sciences, Tzarigradsko shousse 72, Sofia 1784, Bulgaria;2. LP3 – Lasers, Plasmas et Procédés Photoniques, UMR 7341 CNRS/Aix-Marseille Univ., Marseille, France |
| |
| Abstract: | 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 CH stretching modes. Highly preferential desorption has been evidenced, with exclusive desorption of water and PAH molecules at the OH and CH resonances, respectively. Potential analytical (e.g. selective analysis of complex samples) and technological (e.g. dry laser cleaning, DLC) applications are discussed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
