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One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study

Magnetic nanoparticles (NPs) are especially interesting for several biomedical applications due to their chemical surface, especially for targeted cancer imaging and therapeutics. In order to realize these applications, it is important to know their magnetic properties among other complementary prop...

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Autores principales: Félix, Lizbet León, Rodriguez Martínez, Marco Antonio, Pacheco Salazar, David Gregorio, Huamani Coaquira, José Antonio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057843/
https://www.ncbi.nlm.nih.gov/pubmed/35516540
http://dx.doi.org/10.1039/d0ra08872b
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author Félix, Lizbet León
Rodriguez Martínez, Marco Antonio
Pacheco Salazar, David Gregorio
Huamani Coaquira, José Antonio
author_facet Félix, Lizbet León
Rodriguez Martínez, Marco Antonio
Pacheco Salazar, David Gregorio
Huamani Coaquira, José Antonio
author_sort Félix, Lizbet León
collection PubMed
description Magnetic nanoparticles (NPs) are especially interesting for several biomedical applications due to their chemical surface, especially for targeted cancer imaging and therapeutics. In order to realize these applications, it is important to know their magnetic properties among other complementary properties that help to improve the understanding of the synthesis process. In this work, we report the magnetic properties of polyethyleneimine-coated magnetite (PEI-Fe(3)O(4)) NPs synthesized by a one-step method via the co-precipitation method and using PEI as a stabilizer. Transmission electron microscopy (TEM) images revealed agglomerated magnetic nanoparticles with an average size of ∼10 nm; meanwhile, the X-ray diffraction (DRX) analysis confirmed a pure magnetite phase. The study of magnetic properties shows a superparamagnetic system with coexistence of non-interacting single NPs with a low blocking temperature (∼35 K) and interacting NPs in the aggregates with a higher blocking temperature (>150 K), in which the interparticle interactions of magnetic cores dominate over surface spin disorder. The interaction between the surface spin-disorder layer and NP core was found to be weak, related to a weak exchange bias effect. A maximum specific loss power (SLP) value of 70 W g(−1) was obtained (f = 571 kHz and H = 23.87 kA m(−1)) indicating that the magnetic response plays a crucial role in determining the heating efficiency for future applications.
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spelling pubmed-90578432022-05-04 One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study Félix, Lizbet León Rodriguez Martínez, Marco Antonio Pacheco Salazar, David Gregorio Huamani Coaquira, José Antonio RSC Adv Chemistry Magnetic nanoparticles (NPs) are especially interesting for several biomedical applications due to their chemical surface, especially for targeted cancer imaging and therapeutics. In order to realize these applications, it is important to know their magnetic properties among other complementary properties that help to improve the understanding of the synthesis process. In this work, we report the magnetic properties of polyethyleneimine-coated magnetite (PEI-Fe(3)O(4)) NPs synthesized by a one-step method via the co-precipitation method and using PEI as a stabilizer. Transmission electron microscopy (TEM) images revealed agglomerated magnetic nanoparticles with an average size of ∼10 nm; meanwhile, the X-ray diffraction (DRX) analysis confirmed a pure magnetite phase. The study of magnetic properties shows a superparamagnetic system with coexistence of non-interacting single NPs with a low blocking temperature (∼35 K) and interacting NPs in the aggregates with a higher blocking temperature (>150 K), in which the interparticle interactions of magnetic cores dominate over surface spin disorder. The interaction between the surface spin-disorder layer and NP core was found to be weak, related to a weak exchange bias effect. A maximum specific loss power (SLP) value of 70 W g(−1) was obtained (f = 571 kHz and H = 23.87 kA m(−1)) indicating that the magnetic response plays a crucial role in determining the heating efficiency for future applications. The Royal Society of Chemistry 2020-11-17 /pmc/articles/PMC9057843/ /pubmed/35516540 http://dx.doi.org/10.1039/d0ra08872b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Félix, Lizbet León
Rodriguez Martínez, Marco Antonio
Pacheco Salazar, David Gregorio
Huamani Coaquira, José Antonio
One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title_full One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title_fullStr One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title_full_unstemmed One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title_short One-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
title_sort one-step synthesis of polyethyleneimine-coated magnetite nanoparticles and their structural, magnetic and power absorption study
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057843/
https://www.ncbi.nlm.nih.gov/pubmed/35516540
http://dx.doi.org/10.1039/d0ra08872b
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