{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T21:48:07Z","timestamp":1775857687867,"version":"3.50.1"},"reference-count":67,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,1,14]],"date-time":"2021-01-14T00:00:00Z","timestamp":1610582400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"FCT","doi-asserted-by":"publisher","award":["UID\/CTM\/50025\/2019"],"award-info":[{"award-number":["UID\/CTM\/50025\/2019"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>The physical properties of the cubic and ferrimagnetic spinel ferrite LiFe5O8 has made it an attractive material for electronic and medical applications. In this work, LiFe5O8 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 \u00b0C, and their structure, morphology, electrical and magnetic characteristics, cytotoxicity, and magnetic hyperthermia assays were performed. The heat treatment of the LiFe5O8 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 \u03b5\u2032 (\u224810 up to \u224814) with a tan\u03b4 almost constant (\u22480.3) 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 \u00b0C, which revealed hysteresis and magnetic saturation of 73 emu g\u22121 at 300 K, showed a heating profile adequate for magnetic hyperthermia applications, showing the potential for biomedical applications.<\/jats:p>","DOI":"10.3390\/nano11010193","type":"journal-article","created":{"date-parts":[[2021,1,14]],"date-time":"2021-01-14T11:39:14Z","timestamp":1610624354000},"page":"193","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Nanostructured LiFe5O8 by a Biogenic Method for Applications from Electronics to Medicine"],"prefix":"10.3390","volume":"11","author":[{"given":"Silvia Soreto","family":"Teixeira","sequence":"first","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Manuel P. F.","family":"Gra\u00e7a","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Jos\u00e9","family":"Lucas","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Manuel Almeida","family":"Valente","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Paula I. P.","family":"Soares","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9258-4899","authenticated-orcid":false,"given":"Maria Carmo","family":"Lan\u00e7a","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal"}]},{"given":"T\u00e2nia","family":"Vieira","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9959-4272","authenticated-orcid":false,"given":"Jorge Carvalho","family":"Silva","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3996-6545","authenticated-orcid":false,"given":"Jo\u00e3o Paulo","family":"Borges","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6789-2515","authenticated-orcid":false,"given":"Luiza-Izabela","family":"Jinga","sequence":"additional","affiliation":[{"name":"National Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1992-7346","authenticated-orcid":false,"given":"Gabriel","family":"Socol","sequence":"additional","affiliation":[{"name":"National Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, Romania"}]},{"given":"Cristiane","family":"Mello Salgueiro","sequence":"additional","affiliation":[{"name":"Veterinary Sciences Institute, Cear\u00e1 State University, Fortaleza 60714-903, Brazil"}]},{"given":"Jos\u00e9","family":"Nunes","sequence":"additional","affiliation":[{"name":"Veterinary Sciences Institute, Cear\u00e1 State University, Fortaleza 60714-903, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7666-4741","authenticated-orcid":false,"given":"Lu\u00eds C.","family":"Costa","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.jmatprotec.2006.10.005","article-title":"Synthesis, characterization and magnetic properties of microcrystalline lithium cobalt ferrite from spent lithium-ion batteries","volume":"183","author":"Bahgat","year":"2007","journal-title":"J. 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