96831 20201124104757.0 doi 10.1038/s41598-019-47704-5 sideral 113546 ART-2019-113546 eng Azevedo, João Double-walled iron oxide nanotubes via selective chemical etching and Kirkendall process 2019 Access copy available to the general public Unrestricted 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. info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0141-032527 info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-006939 info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-016387 info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0145-030510 info:eu-repo/grantAgreement/EC/H2020/734801/EU/Novel magnetic nanostructures for medical applications/MAGNAMED This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 734801-MAGNAMED info:eu-repo/grantAgreement/ES/MINECO/RTI2018-094683-B-C52 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.998 2019 MULTIDISCIPLINARY SCIENCES 17 / 71 = 0.239 2019 Q1 T1 1.341 2019 Multidisciplinary 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fernández-García, M.P. (orcid)0000-0002-6761-6171 Magén, César Universidad de Zaragoza Mendes, Adélio Araújo, João P. Sousa, Célia T. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 9 (2019), 11994 [8 pp] Sci. rep. Scientific Reports 2045-2322 1448352 http://zaguan.unizar.es/record/96831/files/texto_completo.pdf Versión publicada 146233 http://zaguan.unizar.es/record/96831/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:96831 articulos driver 2020-11-22-12:40:22 ARTICLE