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Self-assembly of iron oxide precursor micelles driven by magnetic stirring time in sol–gel coatings
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, 'RSC Advances ', vol: 9, pages: 17571-17580 (2019), E-Prints Complutense. Archivo Institucional de la UCM, E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, RSC Advances, e-Archivo. Repositorio Institucional de la Universidad Carlos III de Madrid
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry (RSC), 2019.
-
Abstract
- [EN] The purpose of this work is to fabricate self-assembled microstructures by the sol–gel method and study the morphological, structural and compositional dependence of 3-Fe2O3 nanoparticles embedded in silica when glycerol (GLY) and cetyl-trimethylammonium bromide (CTAB) are added as steric agents simultaneously. The combined action of a polyalcohol and a surfactant significantly modifies the morphology of the sample giving rise to a different microstructure in each of the studied cases (1, 3 and 7 days of magnetic stirring time). This is due to the fact that the addition of these two compounds leads to a considerable increase in gelation time as GLY can interact with the alkoxide group on the surface of the iron oxide precursor micelle and/or be incorporated into the hydrophilic chains of CTAB. This last effect causes the iron oxide precursor micelles to be interconnected forming aggregates whose size and structure depend on the magnetic stirring time of the sol–gel synthetic route. In this paper, crystalline structure, composition, purity and morphology of the sol–gel coatings densified at 960 ºC are examined. Emphasis is placed on the nominal percentage of the different iron oxides found in the samples and on the morphological and structural differences. This work implies the possibility of patterning 3-Fe2O3 nanoparticles in coatings and controlling their purity by an easy one-pot sol–gel method.<br />Spanish Ministry of Industry, Economy and Competitiveness for financing the project MAT2015-65445-C2-1-R, MAT2017-86450-C4-1-R, MAT2015-67557-C2-1-P, by the Comunidad de Madrid S2013/MIT-2850 NANOFRONTMAG and H2020 AMPHIBIAN Project ID: 720853. The authors are also grateful to the BM25-SpLine staff for their valuable technical support beyond their duties and for the financial support from the Spanish Ministry of Science, Innovation and Universities (MICIU) and The Spanish National Research Council (CSIC) under Grant No. PIE 2010- 6OE-013, The ESRF – The European Synchrotron, MICIU and CSIC are acknowledged for provision of synchrotron radiation facilities. A. S. acknowledges the Financial support from the Comunidad de Madrid for an “Atracción de Talento Investigador” contract (No. 2017-t2/IND5395).
- Subjects :
- Materials science
General Chemical Engineering
Iron oxide
Nanoparticle
02 engineering and technology
Sol–gel
010402 general chemistry
01 natural sciences
Micelle
chemistry.chemical_compound
Pulmonary surfactant
Sol-gel
Física de materiales
Física
General Chemistry
021001 nanoscience & nanotechnology
Microstructure
3. Good health
0104 chemical sciences
chemistry
Chemical engineering
Física del estado sólido
Alkoxide
Self-assembly
Microstructures
0210 nano-technology
Subjects
Details
- ISSN :
- 20462069
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- RSC Advances
- Accession number :
- edsair.doi.dedup.....79a132e0c025f30701dd2b7eb5bd3913