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Título del libro:
Título del capítulo: Synthesis and Characterization of Fe3O4@SiO2 Core/shell Nanocomposite Films

Autores UNAM:
JOSE JUAN GERVACIO ARCINIEGA; MILLER TOLEDO SOLANO;
Autores externos:

Idioma:

Año de publicación:
2023
Palabras clave:

Crystal structure; Glass substrates; Magnetite; Nanocomposite films; Nanocomposites; Particle size; Scanning electron microscopy; Silicon; SiO2 nanoparticles; Sols; X ray diffraction; % reductions; Amorphous silica; Atomic-force-microscopy; Core shell; Core-shell nanocomposites; Fe3O4@SiO2; Inorganics; Silica layers; Synthesis and characterizations; X- ray diffractions; Silica


Resumen:

Fe3O4@SiO2 core/shell nanocomposite was prepared by sol?gel method using TEOS as silica precursor. The colloidal spheres were concentrated on the surface of a glass substrate during evaporation of water in air at 80 °C; they formed hexagonal compact layers and built up an opaline film. The core/shell nanocomposite was investigated by different characterization methods (XRD, AFM, SEM, and FTIR). X-ray diffraction (XRD) identified the crystal structure of Fe3O4 and showed an amorphous silica layer. It was observed that there was a reduction in magnetization when comparing the Fe3O4 nanoparticles with the Fe3O4@SiO2 core/shell nanocomposite. This reduction could be due to the coating process with an antimagnetic inorganic amorphous silica inorganic silica layer. The core size was found to be an average size of 11 nm identified by atomic force microscopy (AFM). The near-spherical shape and particle size of Fe3O4@SiO2 were revealed by scanning electron microscopy (SEM). The Fe3O4@SiO2 core/shell nanocomposite showed excellent dispersion property and magnetic behavior close to superparamagnetic materials. Their intriguing characteristics and how they react in the presence of external magnetic fields make them a potential contender for various applications, including data storage, sensing, and biomedicine. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.


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