One single-step synthesis of multifunctional methylene blue-coated magnetite nanoparticles |
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Authors: | Lourdes I Cabrera Marta Martínez Dolores Reyman Patricia Crespo M Puerto Morales Pilar Herrasti |
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Institution: | 1.Facultad de Ciencias,Universidad Autónoma de Madrid,Madrid,Spain;2.Instituto de Magnetismo Aplicado (UCM-ADIF-CSIC),Las Rozas,Spain;3.Departamento de Física de Materiales,UCM,Madrid,Spain;4.Instituto de Ciencia de Materiales de Madrid, CSIC,Madrid,Spain |
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Abstract: | This work reports the preparation of hybrid nanoparticles with magnetic and fluorescent properties. The material is based
on magnetite nanoparticles (NPs) coated with fluorophore methylene blue (MB). The synthesis of a multifunctional material
with magnetic and fluorescent features is carried out in a single step by electrooxidation. The effect of the presence of
methylene blue in the synthetic medium is discussed. The presence of MB polymer at the NP surface is demonstrated with visible
UV, infrared and Raman spectroscopy. The NPs morphology, structure and size are determined by transmission electron microscopy
(TEM) and X-ray diffraction. The magnetic properties are measured with a vibrating sample magnetometer (VMS). In overall,
the results show that magnetite NPs generated electrochemically in the presence of MB present a core/shell structure, being
the NP at the core surrounded by methylene blue polymer, leading to a nanocomposite or hybrid material. |
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