Open AccessSynthesis and characterisation of magnetite nanoparticles using gelatin and starch as capping agents
Author(s) -
AguilarMéndez Miguel Ángel,
EspinosaSolares Teodoro,
GuerreroToledo Flor de María,
CansecoGonzález Daniel,
VelázquezHernández Azucena,
AguilarMoreno Guadalupe Stefanny,
NavarroCerón Elizabeth
Publication year - 2020
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
ISSN - 1751-875X
DOI - 10.1049/iet-nbt.2019.0204
Subject(s) - gelatin , nanoparticle , zeta potential , fourier transform infrared spectroscopy , materials science , dynamic light scattering , chemical engineering , starch , transmission electron microscopy , magnetite , scanning electron microscope , nanotechnology , nuclear chemistry , chemistry , composite material , organic chemistry , metallurgy , engineering
Nanoparticles of magnetite passivated with gelatin and starch were synthesised using a co‐precipitation technique. The nanoparticles were characterised using ultraviolet–visible (UV–vis), dynamic light scattering (DLS), Zeta potential, transmission electron microscope (TEM), X‐ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The UV–vis spectra showed characteristic surface plasmon resonance of magnetite nanoparticles. The DLS results showed the nanoparticles to have average hydrodynamic diameters of 138 ± 2 and 283 ± 21 nm for particles passivated with gelatin and starch, respectively. The stability in a colloidal solution was greater in nanoparticles passivated with gelatin than nanoparticles obtained with starch, as can be seen by their Zeta potential value (−31 ± 2 and −16 ± 0.5 mV, respectively). According to the TEM evaluation, the use of gelatin allowed to obtain nanoparticles with a spherical morphology and an average size of 10 ± 2 nm. However, when using starch the nanoparticles exhibited diverse morphologies with an average size of 25 ± 7 nm. The XRD results confirmed the crystalline structure of the samples, which showed crystallite sizes of 14.90 and 24.43 nm for nanoparticles passivated with gelatin and starch, respectively. FTIR analysis proved the establishment of interactions between functional groups of biopolymers and magnetite nanoparticles.