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Desorption and Ionization Mechanisms in Desorption Atmospheric Pressure Photoionization
Analytical Chemistry, 2008The factors influencing desorption and ionization in newly developed desorption atmospheric pressure photoionization-mass spectrometry (DAPPI-MS) were studied. Redirecting the DAPPI spray was observed to further improve the versatility of the technique: for dilute samples, parallel spray with increased analyte signal was found to be the best suited ...
Laura, Luosujärvi +8 more
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Desorption rate isotherms in flash desorption analysis
Journal of Catalysis, 1977Abstract In most flash desorption and temperature programmed desorption experiments only a small fraction of the data obtained is used in the kinetic analysis. A technique which utilizes more of the desorption data from a series of desorption curves obtained at different initial surface coverages is discussed.
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Field Desorption and Photon-Induced Field Desorption
1982More than 30 years have passed since E.W. Muller first introduced the field ion microscope which now allows scientists to observe single atoms on surfaces. Relatively few laboratories have started or continued to develop and use field ion microscopy, despite the enormous possibilities for investigating the many urgent open questions in surface science ...
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The Journal of Chemical Physics, 1959
A theory of field desorption covering both covalent and ionic binding is presented. The mechanism corresponds to field ionization preceded by complete or partial ordinary desorption in the former and to direct ionic evaporation in the latter case. Comparison with experiment shows that field desorption of Ba can proceed via Ba+ or Ba+2.
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A theory of field desorption covering both covalent and ionic binding is presented. The mechanism corresponds to field ionization preceded by complete or partial ordinary desorption in the former and to direct ionic evaporation in the latter case. Comparison with experiment shows that field desorption of Ba can proceed via Ba+ or Ba+2.
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Journal of Vacuum Science and Technology, 1969
The desorption of materials from the walls of a vacuum vessel by means of phonic energy has been observed. To study this effect and its application to improved pumpdown of nonbakeable systems, an ultrasonic transducer was attached to a small system and the desorption products observed with a quadrupole gas analyzer.
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The desorption of materials from the walls of a vacuum vessel by means of phonic energy has been observed. To study this effect and its application to improved pumpdown of nonbakeable systems, an ultrasonic transducer was attached to a small system and the desorption products observed with a quadrupole gas analyzer.
openaire +1 more source