Magnetic force microscopy characterization of cobalt nanoparticles: A preliminary study

Angeloni, Livia; Passeri, Daniele; Schiavi, Pier Giorgio; Pagnanelli, Francesca; Rossi, Marco

doi:10.1063/5.0023608

Cited by 2 publications

(1 citation statement)

References 50 publications

(51 reference statements)

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“…The resulting AFM images reveal a clear fibrous morphology Fig ( 3.A), notably lacking any signs of aggregation or clumping. Analysis of these AFM images consistently confirms that the particle size remains below 70 nm [41].…”

Section: Textural Characters (Tem and Afm) Of Cobalt Complex Nano Par...supporting

confidence: 52%

Nano cobalt complex as a highly senstive sensor for detection of methylen blue (MB) by QCM technique

El-Sherif,

ElMosallamy,

Bayomi

et al. 2024

Bulletin of Faculty of Science, Zagazig University

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The textile industry's dyeing processes generate dyes that act as pollutants, contributing to the discoloration of wastewater and other environmental concerns. These nanosensors hold promise in detecting various azo-toxic dyes present in food products, thereby offering an expansive potential for future innovation in sensor design. Herein explores the advantages of nanosensors over traditional sensing methods, their diverse applications in utilizing nanomaterials, and the potential health consequences of azo dyes on human well-being. The article further outlines critical parameters for determining permissible limits and recommends an Acceptable Daily Intake (ADI) for azo toxic dyes. A groundbreaking innovation is a novel nanosensor employing cobalt nanoparticles for detection of Methylene Blue (MB) dye. Characterization of this nano cobalt sensor utilized various analytical tools, including Dynamic Light Scattering (DLS), Zeta potential analysis, Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), Fourier-Transform Infrared Spectroscopy (FT-IR), as well as BET surface area and pore size determination . Additionally, the sensor's mechanical stability was affirmed through investigation of the applied ionophore's lipophilicity using contact angle measurements, revealing an average contact angle of 121.59°. Notably, this attribute contributes to the robustness of the sensor. The sensor's responsiveness under differing pH and temperature conditions was carefully monitored. Impressively, the proposed sensor exhibited rapid and sensitive responses, even at very low dye concentrations (1 ppm), with a swift response time of 3 minutes.

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Section: Textural Characters (Tem and Afm) Of Cobalt Complex Nano Par...supporting

confidence: 52%

Nano cobalt complex as a highly senstive sensor for detection of methylen blue (MB) by QCM technique

El-Sherif,

ElMosallamy,

Bayomi

et al. 2024

Bulletin of Faculty of Science, Zagazig University

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Synthesis of cobalt nanoparticles in aqueous solutions assisted by polymer/inorganic hybrid

Permyakova,

Zheltonozhskaya,

Klymchuk

et al. 2024

Polim. z.

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Hydrophilic polymer/inorganic hybrids (PIH) containing silica nanoparticles and polyacrylamide chains proved to be effective matrices for the in situ synthesis of cobalt nanoparticles. PIH sample was synthesized by free-radical polymerization of acrylamide from the unmodified surface of SiO2 nanoparticles and characterized by elemental analysis, dynamic thermogravimetric analysis, static light scattering, potentiometric titration, viscometry and transmission electron microscopy (TEM). The processes of borohydride reduction of cobalt ions from the Co(NO3)2·6H2O solution to nanoparticles in water medium and aqueous solutions of PIH were studied as a function of the concentrations of metal salt and hybrid concentrations using UV-Vis spectroscopy and TEM. A special approach to characterize the kinetics and efficiency of CoNPs formation in water medium and hybrid solutions using UV-Vis spectroscopy was implemented. The kinetic parameters of the CoNPs formation process as well as the yield, size, and morphology of nanoparticles in hybrid solutions and water medium at various concentrations of metal salt and hybrid were determined. The growth of both concentrations of reagents had a positive effect on the rate of formation of metal nanoparticles and their yield, but in all cases, the reduction process developed much slower in hybrid solutions compared to pure water. The morphology of the CoNPs/PIH nanocomposites was mainly represented by separate swollen hybrid particles containing metal nanoparticles with dav~3 nm.

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Magnetic force microscopy characterization of cobalt nanoparticles: A preliminary study

Cited by 2 publications

References 50 publications

Nano cobalt complex as a highly senstive sensor for detection of methylen blue (MB) by QCM technique

Nano cobalt complex as a highly senstive sensor for detection of methylen blue (MB) by QCM technique

Synthesis of cobalt nanoparticles in aqueous solutions assisted by polymer/inorganic hybrid

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