Carbon-coated functionalized magnetic nanoparticles for biomedical applications

Carbon-coated magnetite nanoparticles (NPs) were synthetized by the mechanochemical method with hematite as precursor and amorphous carbon as inorganic reductor. After 18 hours of milling in an inert atmosphere, a nanocomposite material of magnetite and carbon was obtained. Structural and magnetic...

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Autores principales: Arana, Mercedes, Bercoff, Paula Gabriela, Jacobo, Silvia, Rodríguez, Marcela Cecilia
Formato: bookPart
Lenguaje:Inglés
Publicado: 2022
Materias:
Carbon
Coatings
Magnetic nanoparticles
Hydrogen peroxide
Biosensor
Acceso en línea:http://hdl.handle.net/11086/29952
Aporte de:
Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba
id I10-R141-11086-29952
record_format dspace
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-141
collection Repositorio Digital Universitario (UNC)
language Inglés
topic Carbon
Coatings
Magnetic nanoparticles
Hydrogen peroxide
Biosensor
spellingShingle Carbon
Coatings
Magnetic nanoparticles
Hydrogen peroxide
Biosensor
Arana, Mercedes
Bercoff, Paula Gabriela
Jacobo, Silvia
Rodríguez, Marcela Cecilia
Carbon-coated functionalized magnetic nanoparticles for biomedical applications
topic_facet Carbon
Coatings
Magnetic nanoparticles
Hydrogen peroxide
Biosensor
description Carbon-coated magnetite nanoparticles (NPs) were synthetized by the mechanochemical method with hematite as precursor and amorphous carbon as inorganic reductor. After 18 hours of milling in an inert atmosphere, a nanocomposite material of magnetite and carbon was obtained. Structural and magnetic properties of the NPs were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and vibrating sample magnetometry. XRD patterns, refined with the Rietveld method, show that magnetite is present in samples milled from 6 hours onward and that after milling for 18 hours and annealing in Ar, the sample contains a single crystalline phase. Magnetization curves for samples with different milling times show saturation magnetization values that range from 34.1 emu/g after 1 h to 78.0 emu/g after 18 h. Coercive fields are about 500 Oe for all samples. TEM studies reveal that the samples are made of amorphous carbon clusters with magnetite NPs of 20 nm. The obtained NPs, associated to electrochemical transducers, show an improved enhancement of the charge transfer for redox processes involving different bioanalytes. Thus, these NPs offer unique properties as a catalyst in biosensing strategies for the electrochemical detection of high-impact markers and the development of theranostics smart-devices for biomedical applications.
format bookPart
author Arana, Mercedes
Bercoff, Paula Gabriela
Jacobo, Silvia
Rodríguez, Marcela Cecilia
author_facet Arana, Mercedes
Bercoff, Paula Gabriela
Jacobo, Silvia
Rodríguez, Marcela Cecilia
author_sort Arana, Mercedes
title Carbon-coated functionalized magnetic nanoparticles for biomedical applications
title_short Carbon-coated functionalized magnetic nanoparticles for biomedical applications
title_full Carbon-coated functionalized magnetic nanoparticles for biomedical applications
title_fullStr Carbon-coated functionalized magnetic nanoparticles for biomedical applications
title_full_unstemmed Carbon-coated functionalized magnetic nanoparticles for biomedical applications
title_sort carbon-coated functionalized magnetic nanoparticles for biomedical applications
publishDate 2022
url http://hdl.handle.net/11086/29952
work_keys_str_mv AT aranamercedes carboncoatedfunctionalizedmagneticnanoparticlesforbiomedicalapplications
AT bercoffpaulagabriela carboncoatedfunctionalizedmagneticnanoparticlesforbiomedicalapplications
AT jacobosilvia carboncoatedfunctionalizedmagneticnanoparticlesforbiomedicalapplications
AT rodriguezmarcelacecilia carboncoatedfunctionalizedmagneticnanoparticlesforbiomedicalapplications
bdutipo_str Repositorios
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