Double-walled iron oxide nanotubes via selective chemical etching and Kirkendall process

Azevedo, João ; Fernández-García, M.P. ; Magén, César (Universidad de Zaragoza) ; Mendes, Adélio ; Araújo, João P. ; Sousa, Célia T.

Resumen: Double-walled oxide nanotube structures are interesting for a wide range of applications, from photocatalysis to drug delivery. In this work, a progressive oxidation method to fabricate double-walled nanotube structures is reported in detail. The approach is based on the electrodeposition of metallic iron nanowires, in porous alumina templates, followed by a selective chemical etching, nanoscale Kirkendall effect, a fast oxidation and out-diffusion of the metallic core structure during thermal annealing. To validate the formation mechanism of such core-shell structure, chemical composition and atomic structure were assessed. The resulting hematite nanotubes have a high degree of uniformity, along several microns, and a nanoscopic double-walled structure.

Idioma: Inglés

DOI: 10.1038/s41598-019-47704-5

Año: 2019

Publicado en: Scientific Reports 9 (2019), 11994 [8 pp]
ISSN: 2045-2322

Factor impacto JCR: 3.998 (2019)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 17 / 71 = 0.239 (2019) - Q1 - T1

Factor impacto SCIMAGO: 1.341 - Multidisciplinary (Q1)

Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0141-032527
Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-006939
Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-016387
Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-030510
Financiación: info:eu-repo/grantAgreement/EC/H2020/734801/EU/Novel magnetic nanostructures for medical applications/MAGNAMED
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RTI2018-094683-B-C52

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)