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Collision-induced dissociation studies on gas-phase titanium oxide cluster cations

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Abstract

Titanium oxide cluster cations \(\mathrm{Ti}_{x}\mathrm{O}_{y}^{+}\) are produced in a molecular beam by combining laser ablation of titanium with the supersonic expansion of oxygen into vacuum. The size distribution of the clusters produced is analyzed by time-of-flight reflectron mass spectrometry. The stable clusters appearing in the mass spectrum can be described by the general formula \((\mathrm{TiO})_{m}(\mathrm{TiO}_{2})_{n}(\mathrm{O}_{2})_{k}^{+}\) (with m,n=0,1,2,… and k=0,1). Additionally, collision-induced dissociation studies of mass selected clusters colliding with Kr atoms in a gas cell have been performed. The results show that the clusters lose neutral O2, TiO and/or (TiO2) n units, and the remaining charged fragments are those with the lowest ionization potentials. From these results the fragmentation cross section of the selected clusters is obtained.

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Authors and Affiliations

  1. Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, 711 10, Heraklion, Greece

    Michalis Velegrakis, Maria Massaouti & Maria Jadraque

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  1. Michalis Velegrakis
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  2. Maria Massaouti
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  3. Maria Jadraque
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Correspondence to Michalis Velegrakis.

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Velegrakis, M., Massaouti, M. & Jadraque, M. Collision-induced dissociation studies on gas-phase titanium oxide cluster cations. Appl. Phys. A 108, 127–131 (2012). https://doi.org/10.1007/s00339-012-6854-1

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  • DOI: https://doi.org/10.1007/s00339-012-6854-1

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