RT Journal Article
SR Electronic
A1 Molcan, Matus
A1 Hashim, Anezka
A1 Kovac, Jozef
A1 Gojzewski, Hubert
A1 Skumiel, Andrzej
A1 Royer, Francois
A1 Jamon, Damien
A1 Kopcansky, Peter
A1 Timko, Milan
T1 Magnetosomes - Bacterial Magnetic Nanoparticles
JF Communications - Scientific Letters of the University of Zilina
YR 2014
VO 16
IS 1
SP 26
OP 32
DO 10.26552/com.C.2014.1.26-32
UL https://komunikacie.uniza.sk/artkey/csl-201401-0005.php
AB The magnetic properties, magneto-optical effects and hyperthermia effect were studied in solution of magnetosomes extracted from cultivated bacteria Magnetospirillum sp. AMB-1. The properties of magnetosomes were changed using different conditions during synthesis and by modification of particles after synthesis by using sonication and ultracentrifugation methods. It was shown that adding a higher amount of Wolfe's vitamin solution (WVS) or ferric quinate (FQ) cause increase of the mean diameter from 47 nm (normal condition) up to 52 nm and 58 nm respectively. Hyperthermic measurements were performed for three types of magnetosome samples: (I) M - not influenced by separation method (long - chains magnetosomes), (II) UM - after centrifugation procedure, and (III) SM - after centrifugation procedure including sonication. The Specific Absorption Rate (SAR) decreased depending on chains shortening and decrease in hysteresis too. The SAR values were 1083, 934 or 463 W/g for the sample M, UM and SM, respectively.