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Magnetic Nanoparticles: Advances in Design and Development for Bio-Inspired Applications
Published in Jince Thomas, Sabu Thomas, Nandakumar Kalarikkal, Jiya Jose, Nanoparticles in Polymer Systems for Biomedical Applications, 2019
Ann Rose Abraham, Sabu Thomas, Nandakumar Kalarikkal
Superparamagnetic5 nanoparticles are highly promising and crucial for cancer therapy, since they do not retain magnetism after removal of external field.6,7 The Mössbauer spectrum at room temperature of superparamagnetic ZnFe2O4 is given in Figure 3.1. The occurrence of single doublet is the characteristic-distinguishing feature of superparamagnetic zinc ferrite. The biocompatibility and the low cytotoxicity of MNPs in human body illustrated by numerous studies make them attractive for biomedical applications. Superparamagnetic iron oxide nanoparticles (SPIONs) are exclusively used for magnetic hyperthermia,8 because of their low toxicity. MNPs get degraded into Fe ions at the lysosomes,9 and the iron accumulates in the body’s iron stores to contribute to the production of hemoglobin.10
Dielectric and electro-optical properties of zinc ferrite nanoparticles dispersed nematic liquid crystal 4’-Heptyl-4-biphenylcarbonnitrile
Published in Liquid Crystals, 2020
Fanindra Pati Pandey, Ayushi Rastogi, Rajiv Manohar, Ravindra Dhar, Shri Singh
In the recent decade, transition metal ferrite NPs have attracted lot of attention due to their unique properties that make them suitable for the use in various fields like magnetic storage, ferrofluids, biomedicine, devices, catalysis and magnetic refrigeration system, etc., [21–25]. Among these NPs, zinc ferrite (ZnFe2O4) both in micro- and nano-scales have find wide applications in several areas. The ZnFe2O4 NPs have high electric resistivity and low eddy current loss and very unique electrical, magnetic, thermal, optical, magneto-optical, magneto- resistive and mechanical properties. These specific properties of ZnFe2O4 NPs suggest the very wide possibilities of their technological applications [21,22,26–28]. Therefore, in our understanding, a composite material obtained by the dispersion of ZnFe2O4 MNPs in host LC matrix will be of wide interest in tailoring the properties of host mesogen leading to its wide applications including LC-based devices. As far as known to us, a comprehensive investigation on the ZnFe2O4 MNPs dispersed LC system has not been reported so far. The present work is focused on the comprehensive investigation of how the dispersion of ZnFe2O4 NPs into host nematic LC 4ʹ-Heptyl-4-biphenylcarbonnitrile (7CB) will affect the dielectric permittivity (ε‘), dielectric anisotropy (Δε), dielectric loss (ε‘‘), birefringence (Δn), threshold voltage (Vth), splay elastic constant (K11), ac conductivity (σac), transmittance, memory effect, etc., of the pristine systems.
Novel Zinc ferrite composite with starch and carboxy methyl starch from biowaste precursor for the removal of Ni (II) ion from aqueous solutions
Published in Journal of Dispersion Science and Technology, 2023
Dimple Sharma, Rimzim Jasrotia, Jandeep Singh, Sunil Mittal, Harminder Singh
In the present work, Zinc ferrite (ZFN) was synthesized using low temperature combustion method.[16] In this method, Zn (NO3)2 18.9 g and FeCl3 32.4 g were separately dissolved in distilled water. Mixed the two saturated solutions and then 47.2 g of ODH (C2H6N4O2) was added slowly with constant stirring to the above prepared solution. Mixture was kept on a water bath at 90 °C for two hours and then annealed in a muffle furnace at 600 °C for three hours.