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Comparison of thermodynamic characteristics of desorption and ionization of silver halides from stainless steel and aluminum-based surfaces according to mass-spectrometry data

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Abstract

Differences in the energetic and kinetic characteristics of the ionization of silver halides from different surfaces are found with the use of mass spectrometry. Ionization of silver-halide clusters from the surface of a standard target made of polished stainless steel (Bruker) is studied in comparison to AMg-6 and Ad-0 aluminum-alloy materials. It is found that, despite the lower specific ionization energy, a rough surface strongly hampers the evaporation and desorption and, hence, lowers the efficiency of sublimation and desorption of a substance. In addition, a rough surface is characterized by irregular surface distribution of energy and uneven heating, which also lowers the efficiency of ionization. The surface geometry is found to affect the thermodynamics and kinetics of the formation and fragmentation of ions. On rough surfaces, the formation energies of ions are higher by a factor of 1.5–2 compared to those on polished surfaces and the spectrum of ions and energy ranges of their existence are much broader.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071, Russia

    I. S. Pytskii & A. K. Buryak

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  1. I. S. Pytskii
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  2. A. K. Buryak
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Correspondence to I. S. Pytskii.

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Original Russian Text © I.S. Pytskii, A.K. Buryak, 2014, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2014, Vol. 50, No. 1, pp. 94–98.

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Pytskii, I.S., Buryak, A.K. Comparison of thermodynamic characteristics of desorption and ionization of silver halides from stainless steel and aluminum-based surfaces according to mass-spectrometry data. Prot Met Phys Chem Surf 50, 121–125 (2014). https://doi.org/10.1134/S2070205114010109

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  • DOI: https://doi.org/10.1134/S2070205114010109

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