Дифференциация магнитных композитов, основанная на их наноструктурной организациистатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 декабря 2017 г.
Аннотация:The purpose of this work was to test a number of
methods for studying nanostructures for forensic examination
by the example of identification of signs of difference
between documents printed by xerography.
Such an expert problem takes place if it is necessary to
establish the fact of substitution of pages of a contract
or insertion of a text into a ready document.
The objects of investigation were magnetic toners
used in laser and multifunction printers (more than 50%
sales in the market).
The differences revealed by the magnetic measurements
in MR spectral width and coercive force of
the hysteresis loops for the samples of characters
printed on printers manufactured by various companies
are caused by different magnetite nanoparticle size distributions
in different types of toners. This assumption
has been confirmed by estimating the average magnetite
particle size from the broadening of the X-ray maxima,
which is rather significant for nanoparticles.