УДК: 537.572, 537.565

The mechanism of laser-stimulated desorption/ionization of nitroaromatic compounds from a nanoporous silicon surface at atmospheric pressure

Dovzhenko, D.S., Kuzishchin, Y.A., Martynov, I.L., Eremin, I.S., Kotkovskiy, G.E., Chistyakov, A.A., Krasovskiy, V.I., Sipaylov, I.P.

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Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Довженко Д.С., Кузищин Ю.А., Мартынов И.Л., Еремин И.С., Котковский Г.Е., Чистяков А.А., Красовский В.И., Сипайло И.П. Механизм лазерно-стимулированной десорбции/ионизации нитроароматических соединений с поверхности нанопористого кремния в условиях атмосферного давления // Оптический журнал. 2014. Т. 81. № 8. С. 19–24.

Dovzhenko D.S., Kuzishchin Yu.A., Martynov I.L., Eremin I.S., Kotkovskiy G.E., Chistyakov A.A., Krasovskiy V.I., Sipaylo I.P. The mechanism of laser-stimulated desorption/ionization of nitroaromatic compounds from a nanoporous silicon surface at atmospheric pressure [in Russian] // Opticheskii Zhurnal. 2014. V. 81. № 8. P. 19–24.

For citation (Journal of Optical Technology):

D. S. Dovzhenko, Yu. A. Kuzishchin, I. L. Martynov, I. S. Eremin, G. E. Kotkovskiĭ, A. A. Chistyakov, V. I. Krasovskiĭ, and I. P. Sipaĭlo, "The mechanism of laser-stimulated desorption/ionization of nitroaromatic compounds from a nanoporous silicon surface at atmospheric pressure," Journal of Optical Technology. 81(8), 435-438 (2014). https://doi.org/10.1364/JOT.81.000435

Abstract:

The question of how to develop methods and devices for the detection of low concentrations of various organic compounds—in particular, explosive substances—is currently attracting much attention. In this connection, there is great interest in laser ionization methods, especially the method of surface laser desorption/ionization from nanostructured surfaces, including porous silicon. In this case, a separate problem is to establish a mechanism for forming ions of the molecules of interest. This paper uses the example of trinitrotoluene to investigate the process of desorption and formation of negative ions of nitroaromatic compounds when a laser acts on porous silicon at atmospheric pressure. The dependence of the ion yield on the intensity of the exciting radiation has been measured. It is established that negative ions of trinitrotoluene form directly on the surface of nanoporous silicon.

Keywords:

ion-mobility spectrometry, porous silicon, laser-stimulated desorption/ionization, trinitrotoluene

OCIS codes: 260.5210; 300.6350

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