Electrization of nanocrystals in flows of supersaturated vaporsстатья
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Авторы:
Melikhov I.V. ,
Mikheev N.B. ,
Lavrikov V.A. ,
Kamenskaya A.N. ,
Kulyukhin S.A.
Журнал:
Russian Journal of Physical Chemistry A
Том:
86
Номер:
10
Год издания:
2012
Издательство:
Pleiades Publishing, Ltd
Местоположение издательства:
Road Town, United Kingdom
Первая страница:
1577
Последняя страница:
1582
DOI:
10.1134/S0036024412100184
Аннотация:
It is found that nano- and microcrystals of a number of compounds grown in ion-free vapor of high supersaturation acquire electric charge. The electrophoretic mobility of these crystals changes, as is demonstrated by the data concerning aerosols formed in cooling the vapor above boiling melts of a number of substances (boiling temperature, 500-1800 K) placed into a 300 K carrier gas. Nano- and microparticles assembled into aggregates are found in flows of the cooled vapor. It is found that the application of an electric field with an intensity of 150-1000 V/cm induces the movement of particles toward the negatively charged electrode at a rate of 5-15 cm/s, the speed of their movement being related linearly to the field intensity and corresponding to the presence of ∼10^3 charge carriers per every particle. It is established that the experimental data are in accordance with the assumption that the growth of each particle results in the decomposition of vapor molecules adsorbed by the particle into ions with the nonequivalent liberation of cations and anions into vapor; i.e., an adsorption-ionization-desorption route for the charging of growing particles is discovered. © 2012 Pleiades Publishing, Ltd.
Добавил в систему:
Мелихов Игорь Витальевич