Open AccessMagnetic hyperthermia behaviour of Co and reduced GO nanocomposites
Author(s) -
Kakavand Anahita,
Sadrnezhaad Sayed Khatiboleslam
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2019.0272
Subject(s) - thermogravimetric analysis , nanocomposite , materials science , graphene , transmission electron microscopy , x ray photoelectron spectroscopy , scanning electron microscope , superparamagnetism , nuclear chemistry , biocompatibility , thermogravimetry , chemical engineering , thermal analysis , nanoparticle , analytical chemistry (journal) , composite material , nanotechnology , chemistry , metallurgy , magnetic field , chromatography , thermal , magnetization , physics , quantum mechanics , meteorology , engineering
Co‐precipitation of CoCl 2 . 6H 2 O with graphene oxide (GO) and heating at 400°C for 4 h under hydrogen resulted in the construction of cobalt/reduced GO (Co/rGO) nanocomposite utilisable in magnetic thermal therapy. Field emission scanning electron microscopy, transmission electron microscopy, X‐ray photoelectron spectroscopy, vibrating sample magnetometry, thermogravimetric analysis/derivative thermogravimetry, and X‐ray diffraction methods characterised the samples. Time–temperature curves of the samples containing 30, 50, 70, and 100 µg ml −1 Co/rGO nanoparticles (NPs) suspended in phosphate‐buffered saline were determined at different specific heating rates. Magnetic‐field response of Co/rGO nanocomposites was better than CoNPs and GO. The biological behaviour of the powders was investigated by 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide assay. Co/rGO nanocomposites showed an acceptable biocompatibility behaviour, whereas the CoNPs demonstrated toxic conduct.