Enhanced magnetization in V Fe3−O4 nanoparticles

Temperature dependent Magnetization and Remanent Magnetization in Pseudo-binary x(Fe2TiO4)-(1-x)(Fe3O4)(0.30

In this work we present preliminary results on magnetization and remanence of synthetic pseudo-binary x(Fe2TiO4)-(1x)(Fe3O4)(0.30<x<1.00). Magnetic characterization was performed at temperature ranges from 100 K up to 400 K. The final objective is to characterize the magnetic response as a function of temperature in order to foresight the future magnetic measurements of the magnetometer include...

Effect of Fe3O4-magnetic nanoparticles on acute exercise enhanced KCNQ1 expression in mouse cardiac muscle

While the potential impact of magnetic nanoparticles (MNPs) has been widely explored in almost all medical fields, including cardiology, one question remains; that is whether MNPs interfere with cardiac physiological processes such as the expression and function of ion channels, especially in vivo. KCNQ(1) channels are richly expressed in cardiac myocytes and are critical to the repolarization ...

PbSe Nanocrystals on Au–Fe3O4 Hybrid Nanoparticles

Surface Enhanced Raman Spectroscopy of Organic Molecules on Magnetite (Fe3O4) Nanoparticles.

Surface-enhanced Raman spectroscopy (SERS) of species bound to environmentally relevant oxide nanoparticles is largely limited to organic molecules structurally related to catechol that facilitate a chemical enhancement of the Raman signal. Here, we report that magnetite (Fe3O4) nanoparticles provide a SERS signal from oxalic acid and cysteine via an electric field enhancement. Magnetite thus l...

Surface induced suppression of magnetization in nanoparticles

A model based on competing exchange interactions is presented for the investigation of nanoparticle magnetization. The ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions contribute differently at the nanoparticle surface and interior, leading to reduced ferromagnetic order at the surface. This model predicts an unconventional temperature dependence of magnetization and a surfa...