RT Journal Article
T1 A combined micro-Raman, X-ray absorption and magnetic study to follow the glycerol-assisted growth of epsilon-iron oxide sol-gel coatings
A1 López Sánchez, Jesús
A1 Serrano, Aída
A1 Campo, A. del
A1 Muñoz Noval, Álvaro
A1 Salas Colera, Eduardo
A1 Cabero Piris, Mariona
A1 Varela Del Arco, María
A1 Abuín, Manuel
A1 Castro, German R.
A1 Rubio Zuazo, Juan
A1 Rodríguez De La Fuente, Óscar
A1 Carmona Tejero, Noemí
AB Epsilon iron oxide (epsilon-Fe_2O_3) coatings on Si(100) substrates are obtained by an easy one-pot sol-gel recipe assisted by glycerol in an acid medium. Glycerol, given its small dimensions, enables the formation of epsilon-Fe_2O_3 nanoparticles with a size of a few nanometers and the highest purity is reached in coatings after a densification treatment at 960 degrees C. The structural and compositional evolution up to 1200 degrees C is studied by confocal Raman microscopy and X-ray absorption spectroscopy techniques, correlating the existing magnetic properties. We report a novel characterization method, which allows monitoring the evolution of the precursor micelles as well as the intermediate and final phases formed. Furthermore, the inherent industrial technology transfer of the sol-gel process is also demonstrated with the epsilon-Fe_2O_3 polymorph, impelling its application in the coatings form.
PB Elsevier Science SA
SN 0925-8388
YR 2022
FD 2022-02-05
LK https://hdl.handle.net/20.500.14352/72438
UL https://hdl.handle.net/20.500.14352/72438
LA eng
NO CRUE-CSIC (Acuerdos Transformativos 2021)©2021 The Author(s). Published by Elsevier This work has been supported by the Ministerio de Ciencia e Innovación (MCINN, Spain) through the projects PIE: 2021-60-E-030, PIE: 2010-6-OE-013, PID2019-104717RB-I00 (2020–2022), MAT2017- 86540-C4-1-R, RTI2018-095856-B-C21 (2019–2021), RTI2018- 097895-B-C43 and RTI2018-095303-A-C52. The authors are grateful to The ESRF (France), MCINN and Consejo Superior de Investigations Científicas (CSIC, Spain) for the provision of synchrotron radiation facilities and to the BM25-SpLine Staff for their valuable help. A.S. and A.M.-N acknowledge financial support from Comunidad de Madrid (Spain) for an “Atracción de Talento Investigador” Contract 2017-t2/IND5395 and 2018-T1/IND-10360, respectively
NO Ministerio de Ciencia e Innovacion (MICINN)
NO Ministerio de Economía y Competitividad (MINECO)
NO Comunidad de Madrid
DS Docta Complutense
RD 17 abr 2025