Mass spectrometric and photoionisation investigations of the structure of heterogeneous clusters

Ding, A.; Futrell, J. H.; Cassidy, RA; Cordis, L.; Hesslich, J.

doi:10.1016/0039-6028(85)90585-0

Cited by 32 publications

(4 citation statements)

References 7 publications

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“…By applying the same technique Ding et al 27 deduced a value of 13.15 eV. In an experiment with energy selected cluster ions the IP of the ͑CO͒ 2 was later determined to be 12.73Ϯ0.05 eV by Norwood et al.…”

Section: Introductionmentioning

confidence: 98%

The investigation of the (CO)+2 ion by dissociative ionization of argon/carbon monoxide clusters

Mähnert

Baumgärtel

Weitzel

1995

The Journal of Chemical Physics

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Section: Introductionmentioning

confidence: 98%

The investigation of the (CO)+2 ion by dissociative ionization of argon/carbon monoxide clusters

Mähnert

Baumgärtel

Weitzel

1995

The Journal of Chemical Physics

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“…It is worthy to mention that the EDS spectra and the quantitative EDS mapping did not indicate the presence of oxygen. The absence of oxygen in Ti 2 SnC_Ar + NCTF may be explained by the irradiation-induced ionization effect, which is reported to be pronounced not only in weakly bound Van der Waals elements but could be also occurred in systems with stronger bonds [ 33 , 34 , 35 ]. This ionization process can change both the equilibrium state and geometry of the overall system, including the Ti 2 SnC matrix and surface SnO “etched out” the Ti 2 SnC.…”

Section: Resultsmentioning

confidence: 99%

The Key Role of Tin (Sn) in Microstructure and Mechanical Properties of Ti2SnC (M2AX) Thin Nanocrystalline Films and Powdered Polycrystalline Samples

et al. 2022

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Layered ternary Ti2SnC carbides have attracted significant attention because of their advantage as a M2AX phase to bridge the gap between properties of metals and ceramics. In this study, Ti2SnC materials were synthesized by two different methods—an unconventional low-energy ion facility (LEIF) based on Ar+ ion beam sputtering of the Ti, Sn, and C targets and sintering of a compressed mixture consisting of Ti, Sn, and C elemental powders up to 1250 °C. The Ti2SnC nanocrystalline thin films obtained by LEIF were irradiated by Ar+ ions with an energy of 30 keV to the fluence of 1.1015 cm−2 in order to examine their irradiation-induced resistivity. Quantitative structural analysis obtained by Cs-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) confirmed transition from ternary Ti2SnC to binary Ti0.98C carbide due to irradiation-induced β-Sn surface segregation. The nanoindentation of Ti2SnC thin nanocrystalline films and Ti2SnC polycrystalline powders shows that irradiation did not affect significantly their mechanical properties when concerning their hardness (H) and Young’s modulus (E) We highlighted the importance of the HAADF-STEM techniques to track atomic pathways clarifying the behavior of Sn atoms at the proximity of irradiation-induced nanoscale defects in Ti2SnC thin films.

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“…The only systematic photoionization study has been reported by Ding et al 20 The photoion yield measurements exhibited smooth increases in the threshold region. The appearance potentials of ArN 2 ϩ and Ar 2 N 2 ϩ were determined to be 14.7 and 14.5 eV, respectively.…”

Section: Introductionmentioning

confidence: 92%

Investigation of the ArN+2 ion by dissociative ionization of argon/nitrogen clusters

Mähnert

Baumgärtel

Weitzel

1995

The Journal of Chemical Physics

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The ArN+2 ion has been investigated by means of photoionization of an argon/nitrogen cluster beam in a threshold photoelectron photoion coincidence experiment. Two pathways for the formation of ArN+2 ions have been observed: (i) the nondissociative ionization of ArN2 neutrals and (ii) the dissociative ionization of Ar2N2. The two pathways are distinguished by the kinetic energy released (KER) in the dissociative ionization. The KER for the reaction Ar2N+2→ArN+2+Ar has been measured as a function of the excitation energy. The comparison of the measured KER with the statistically expected KER allows us to extrapolate to the thermochemical threshold of the reaction under investigation. A consistent picture is obtained under two assumptions: (i) the ArN+2 ion is linear and (ii) the ionization potential of ArN2 is 14.486±0.05 eV. The former assumption is confirmed by high level ab initio calculations (QCISD/6-311G*).

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Mass spectrometric and photoionisation investigations of the structure of heterogeneous clusters

Cited by 32 publications

References 7 publications

The investigation of the (CO)+2 ion by dissociative ionization of argon/carbon monoxide clusters

The investigation of the (CO)+2 ion by dissociative ionization of argon/carbon monoxide clusters

The Key Role of Tin (Sn) in Microstructure and Mechanical Properties of Ti2SnC (M2AX) Thin Nanocrystalline Films and Powdered Polycrystalline Samples

Investigation of the ArN+2 ion by dissociative ionization of argon/nitrogen clusters

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