Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine
The physical properties of the cubic and ferrimagnetic spinel ferrite LiFe<sub>5</sub>O<sub>8</sub> has made it an attractive material for electronic and medical applications. In this work, LiFe<sub>5</sub>O<sub>8</sub> nanosized crystallites were synt...
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doaj-dbde94a5b0614532a90483f60243fff72021-01-15T00:01:10ZengMDPI AGNanomaterials2079-49912021-01-011119319310.3390/nano11010193Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to MedicineSilvia Soreto Teixeira0Manuel P. F. Graça1José Lucas2Manuel Almeida Valente3Paula I. P. Soares4Maria Carmo Lança5Tânia Vieira6Jorge Carvalho Silva7João Paulo Borges8Luiza-Izabela Jinga9Gabriel Socol10Cristiane Mello Salgueiro11José Nunes12Luís C. Costa13I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalCENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalCENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalCENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalCENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalCENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalNational Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, RomaniaNational Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, RomaniaVeterinary Sciences Institute, Ceará State University, Fortaleza 60714-903, BrazilVeterinary Sciences Institute, Ceará State University, Fortaleza 60714-903, BrazilI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalThe physical properties of the cubic and ferrimagnetic spinel ferrite LiFe<sub>5</sub>O<sub>8</sub> has made it an attractive material for electronic and medical applications. In this work, LiFe<sub>5</sub>O<sub>8</sub> nanosized crystallites were synthesized by a novel and eco-friendly sol-gel process, by using powder coconut water as a mediated reaction medium. The dried powders were heat-treated (HT) at temperatures between 400 and 1000 °C, and their structure, morphology, electrical and magnetic characteristics, cytotoxicity, and magnetic hyperthermia assays were performed. The heat treatment of the LiFe<sub>5</sub>O<sub>8</sub> powder tunes the crystallite sizes between 50 nm and 200 nm. When increasing the temperature of the HT, secondary phases start to form. The dielectric analysis revealed, at 300 K and 10 kHz, an increase of <inline-formula><math display="inline"><semantics><mrow><msup><mi>ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> (≈10 up to ≈14) with a <inline-formula><math display="inline"><semantics><mrow><mi>t</mi><mi>a</mi><mi>n</mi></mrow></semantics></math></inline-formula><inline-formula><math display="inline"><semantics><mi>δ</mi></semantics></math></inline-formula> almost constant (≈0.3) with the increase of the HT temperature. The cytotoxicity results reveal, for concentrations below 2.5 mg/mL, that all samples have a non-cytotoxicity property. The sample heat-treated at 1000 °C, which revealed hysteresis and magnetic saturation of 73 emu g<sup>−1</sup> at 300 K, showed a heating profile adequate for magnetic hyperthermia applications, showing the potential for biomedical applications.https://www.mdpi.com/2079-4991/11/1/193lithium ferriteproteic routecoconut water powderdielectric spectroscopymagnetic hyperthermiaspecific absorption rate |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Silvia Soreto Teixeira Manuel P. F. Graça José Lucas Manuel Almeida Valente Paula I. P. Soares Maria Carmo Lança Tânia Vieira Jorge Carvalho Silva João Paulo Borges Luiza-Izabela Jinga Gabriel Socol Cristiane Mello Salgueiro José Nunes Luís C. Costa |
spellingShingle |
Silvia Soreto Teixeira Manuel P. F. Graça José Lucas Manuel Almeida Valente Paula I. P. Soares Maria Carmo Lança Tânia Vieira Jorge Carvalho Silva João Paulo Borges Luiza-Izabela Jinga Gabriel Socol Cristiane Mello Salgueiro José Nunes Luís C. Costa Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine Nanomaterials lithium ferrite proteic route coconut water powder dielectric spectroscopy magnetic hyperthermia specific absorption rate |
author_facet |
Silvia Soreto Teixeira Manuel P. F. Graça José Lucas Manuel Almeida Valente Paula I. P. Soares Maria Carmo Lança Tânia Vieira Jorge Carvalho Silva João Paulo Borges Luiza-Izabela Jinga Gabriel Socol Cristiane Mello Salgueiro José Nunes Luís C. Costa |
author_sort |
Silvia Soreto Teixeira |
title |
Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine |
title_short |
Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine |
title_full |
Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine |
title_fullStr |
Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine |
title_full_unstemmed |
Nanostructured LiFe<sub>5</sub>O<sub>8</sub> by a Biogenic Method for Applications from Electronics to Medicine |
title_sort |
nanostructured life<sub>5</sub>o<sub>8</sub> by a biogenic method for applications from electronics to medicine |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2021-01-01 |
description |
The physical properties of the cubic and ferrimagnetic spinel ferrite LiFe<sub>5</sub>O<sub>8</sub> has made it an attractive material for electronic and medical applications. In this work, LiFe<sub>5</sub>O<sub>8</sub> nanosized crystallites were synthesized by a novel and eco-friendly sol-gel process, by using powder coconut water as a mediated reaction medium. The dried powders were heat-treated (HT) at temperatures between 400 and 1000 °C, and their structure, morphology, electrical and magnetic characteristics, cytotoxicity, and magnetic hyperthermia assays were performed. The heat treatment of the LiFe<sub>5</sub>O<sub>8</sub> powder tunes the crystallite sizes between 50 nm and 200 nm. When increasing the temperature of the HT, secondary phases start to form. The dielectric analysis revealed, at 300 K and 10 kHz, an increase of <inline-formula><math display="inline"><semantics><mrow><msup><mi>ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> (≈10 up to ≈14) with a <inline-formula><math display="inline"><semantics><mrow><mi>t</mi><mi>a</mi><mi>n</mi></mrow></semantics></math></inline-formula><inline-formula><math display="inline"><semantics><mi>δ</mi></semantics></math></inline-formula> almost constant (≈0.3) with the increase of the HT temperature. The cytotoxicity results reveal, for concentrations below 2.5 mg/mL, that all samples have a non-cytotoxicity property. The sample heat-treated at 1000 °C, which revealed hysteresis and magnetic saturation of 73 emu g<sup>−1</sup> at 300 K, showed a heating profile adequate for magnetic hyperthermia applications, showing the potential for biomedical applications. |
topic |
lithium ferrite proteic route coconut water powder dielectric spectroscopy magnetic hyperthermia specific absorption rate |
url |
https://www.mdpi.com/2079-4991/11/1/193 |
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