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Mpms xl system

Manufactured by Quantum Design

The MPMS XL system is a high-performance magnetometer designed for measurements of magnetic properties of materials. It provides precise control and measurement of magnetic fields, temperature, and other experimental parameters. The system is capable of performing a variety of magnetic characterization techniques, including magnetization, susceptibility, and hysteresis measurements.

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2 protocols using mpms xl system

1

Characterization of Coated Nanoparticles

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The phase composition and crystal structure of bare nanoparticles and mean size of crystallites were studied by powder X‐ray diffraction with CuKα radiation. Bruker D8 diffractometer was employed and the diffraction pattern was analyzed by Rietveld method in the FullProf program. The mean size of crystallites was determined based on the analysis of peak broadening, for which the Thompson‐Cox‐Hastings pseudo‐Voigt profile was applied to separate the size and strain contribution. The instrumental contribution to the broadening was determined on a strain‐free tungsten powder with crystallite size of 9.4 μm.
The accurate ratio of metals in the bare sample was determined by X‐ray fluorescence spectroscopy on an Axios spectrometer.
Magnetic properties were measured by SQUID magnetometry in DC fields by using a Quantum Design MPMS XL system. The ZFC/FC studies were carried out in magnetic field of 1.6 kA/m.
The morphology and size of nanoparticles were analyzed by transmission electron microscopy on a Philips CM 120 system.
The colloidal stability of silica‐coated particles in aqueous suspension and their hydrodynamic size were probed by dynamic light scattering (DLS) on a Malvern Zetasizer Nano S. In addition, the zeta potential of the particles was measured on the same instrumentation by the laser Doppler electrophoresis.
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2

Characterization of Bio-functionalized Magnetic Nanoparticles

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A magnetic rack purchased from Sigma Aldrich (Lyon, Auvergne-Rhône-Alpes, France) and a tube revolver/rotator purchased from Thermo Fisher Scientific (Waltham, Massachusetts, U.S) were used during the bio-functionalization process of MNPs. All experiments for indirect measurements of the biomarkers were carried out at room temperature (22 ± 2 °C). The indirect measurements were carried out using UV-vis spectrophotometry (JENWAY 7205) purchased from Jeulin (Evreux, Normandy, France). Transmission electron microscopy (TEM) studies were carried out using JEOL JEM 1210 at 120 kV. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) analysis was done using the QUANTA FEI 200 FEG-ESEM device. The solid sample was analyzed for this. Magnetization hysteresis cycle was measured using Quantum Design MPMS-XL system at 300K with a maximum of 60 kOe.
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