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New approach to surface ionization and drift-tube spectroscopy of organic molecules

  • Surfaces, Electron and Ion Emission
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Abstract

A new physical model of ionization of organic molecules from the class of amines on the oxidized surface of transition metals is suggested. According to this model, the process involves the capture of protons or hydroxyl groups forming on the oxide surface upon water molecule adsorption. The adequacy of the model is demonstrated experimentally with test amines, such as Novocaine (procaine), bencaine, Dimedrol (diphenylhydramine), etc. A theory of drift motion of ion beams that includes the space charge effect is proposed. It is shown that the quantity P ij0 v 2g (where μ is the ion mobility, j is the ion current density, ɛ0 is the permittivity, and v g is the longitudinal velocity of an ionized gas) plays the role of perveance for intense drift ion beams. A new type of drift-tube spectrometer that uses an ion source due to surface ionization is developed.

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Translated from Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 72, No. 12, 2002, pp. 88–93.

Original Russian Text Copyright © 2002 by Bannykh, Povarova, Kapustin.

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Bannykh, O.A., Povarova, K.B. & Kapustin, V.I. New approach to surface ionization and drift-tube spectroscopy of organic molecules. Tech. Phys. 47, 1570–1575 (2002). https://doi.org/10.1134/1.1529949

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  • DOI: https://doi.org/10.1134/1.1529949

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