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Single-Photon Ionization Soft-X-Ray Laser Mass Spectrometry of Potential Hydrogen Storage Materials

  • F. Dong
  • E. R. Bernstein
  • J. J. Rocca
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 136)

Abstract

A desk-top size capillary discharge 46.9 nm lasear is applied in the gas phase study of nanoclusters. The high photon energy allows for single-photon ionization mass spectrometry with reduced cluster fragmentation. In the present studies, neutral Al m C n and Al m C n H x cluster are investigation for the first time. Single photon ionization through 46.9 nm, 118 nm, 193 nm lasers is used to detect neutral cluster distributions through time of flight mass spectrometry. Al m C n clusters are generated through laser ablation of a mixture of Al and C powders pressed into a disk. An oscillation of the vertical ionization energies (VIEs) of Al m C n clusters is observed in the experiments. The VIEs of Al m C n clusters changes as a function of the numbers of Al and C atoms in the clusters. Al m C n H x clusters are generated through an Al ablation plasma-hydrocarbon reaction, an Al-C ablation plasma reacting with H2 gas, or through cold Al m C n clusters reacting with H2 gas in a fast flow reactor. DFT and ab inito calculations are carried out to explore the structures, IEs, and electronic structures of Al m C n H x clusters. C=C bonds are favored for the lowest energy structures for Al m C n clusters. Be m C n H x are generated through a beryllium ablation plasma-hydrocarbon reaction and detected by single photon ionization of 193 nm laser. Both Al m C n H x and Be m C n H x are considered as potential hydrogen storage materials.

Keywords

Laser Ablation Lower Energy Structure Single Photon Ionization Laser Mass Spectrometry Vertical Ionization Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Canopus Academic Publishing Limited 2011

Authors and Affiliations

  • F. Dong
    • 1
    • 3
  • E. R. Bernstein
    • 1
    • 3
  • J. J. Rocca
    • 1
    • 2
    • 4
  1. 1.NSF ERC for Extreme Ultraviolet Science and TechnologyColorado State UniversityColoradoUSA
  2. 2.Department of Electrical and Computer EngineeringColorado State UniversityColoradoUSA
  3. 3.Department of ChemistryColorado State UniversityColoradoUSA
  4. 4.Department of PhysicsColorado State UniversityColoradoUSA

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