Porous silicon nanoparticles as biocompatible contrast agents for magnetic resonance imagingстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 16 февраля 2016 г.
Аннотация:We propose porous silicon nanoparticles (PSi NPs) with natural oxide coating as biocompatible
and bioresorbable contrast agents for magnetic resonant imaging (MRI). A strong shortening of the
transversal proton relaxation time (T2) was observed for aqueous suspensions of PSi NPs, whereas
the longitudinal relaxation time (T1) changed moderately. The longitudinal and transversal
relaxivities are estimated to be 0.03 and 0.4 l/(gs), respectively, which are promising for
biomedical studies. The proton relaxation is suggested to undergo via the magnetic dipole-dipole
interaction with Si dangling bonds on surfaces of PSi NPs. MRI experiments with phantoms have
revealed the remarkable contrasting properties of PSi NPs for medical diagnostics.