Postionization of molecules desorbed from surfaces by keV ion bombardment with femtosecond laser pulses
| Autor: | Robert M. Braun, K. F. Willey, Vasil Vorsa, Nicholas Winograd |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Chemistry
Organic Chemistry Analytical chemistry Photoionization Laser Spectral line Analytical Chemistry law.invention Metal Fragmentation (mass spectrometry) law visual_art Femtosecond Physics::Atomic and Molecular Clusters Mass spectrum visual_art.visual_art_medium Molecule Physics::Chemical Physics Astrophysics::Galaxy Astrophysics Spectroscopy |
| Zdroj: | Rapid Communications in Mass Spectrometry. 12:1253-1260 |
| ISSN: | 1097-0231 0951-4198 |
| DOI: | 10.1002/(sici)1097-0231(19980930)12:18<1253::aid-rcm317>3.0.co;2-h |
| Popis: | We report the use of femtosecond laser photoionization of sputtered neutral molecules to enhance the sensitivity of detection and to improve the prospects for molecule-specific imaging experiments. Results are presented for patterned metal oxides, polycyclic aromatic hydrocarbons and several amino acids. In addition to increased signal levels, we find that is photoionization generally yields simpler mass spectra than the corresponding SIMS spectra, although considerable fragmentation is observed in both cases. |
| Databáze: | OpenAIRE |
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