Comprehensive structural and magnetic properties of iron oxide nanoparticles synthesized through chemical routes

Ghosh, Anamika; Srinivas, V.; Ramaprabhu, Sundara

doi:10.1016/j.jallcom.2019.152931

Cited by 18 publications

(8 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…42 The large coercivity values are also attributed to the high anisotropy present in a stable single state domain. 43 The remanence values M r obtained for the MNP and MPFs are 2.93 and 1.6 emu/g respectively. The remanence to saturation magnetization ratio (M r /M s ) of both MNPs and MPFs is found to be 0.12 which confirms the superparamagnetic nature of the synthesized nanoparticles.…”

Section: Resultsmentioning

confidence: 88%

See 1 more Smart Citation

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

Mohan

Singhal

Ramanan

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

The role of the collector properties in changing the fiber morphology in electrospinning has not been completely understood yet. In this work, we studied the effect of different collectors on the helicity of the magnetic polystyrene nanocomposite fibers containing superparamagnetic magnetite nanoparticles.Aluminum and ice were used as solid collectors. Ethanol, ethanol-deionized (DI) water mixture, sodium dodecyl sulfate, Triton X-100, deionized water, and NaCl baths were used as liquid collectors. Ice, when surrounded by a conductive foil, produced excellent fiber alignment, but increased local humidity, inhibiting the continuous jet formation. The deionized water and NaCl bath exhibited minimum helicity. The surfactant bath produced different structures such as coiled, helical, and zig-zag with varied diameters. Ethanol and DI/Ethanol baths were found to retain the structure of the deformed fiber formed due to jet instability. The helicity of the fibers was observed to increase with decreasing surface tension. Incorporation of the magnetic phase affected the viscosity of the polymer solution and the hydrophobicity of the polystyrene fibers further influencing the obtained morphologies.

show abstract

Section: Resultsmentioning

confidence: 88%

“…The H c values vary with the particle size and are reported to vary from 0–190 Oe for MNPs with a size range of 9–80 nm 42 . The large coercivity values are also attributed to the high anisotropy present in a stable single state domain 43 . The remanence values M r obtained for the MNP and MPFs are 2.93 and 1.6 emu/g respectively.…”

Section: Resultsmentioning

confidence: 94%

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

Mohan

Singhal

Ramanan

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…However, the presence of coercivity in the order of a few Oersted above T B can be due to the dipolar interaction efects. An analytical expression consisting of both ferromagnetic (FM) and superparamagnetic (SPM) components has been employed to identify the magnetic interactions (Ghosh et al 2020;Saha et al 2009;Singh et al 2010) is given Here, S is squareness ratio, M Sf and M Sp are FM and SPM saturation magnetization, respectively. Below T B , M-H loops were well itted with a combination of FM (irst term) and SPM (second term) components, as shown (Fig.…”

Section: Resultsmentioning

confidence: 99%

Design of various Ni–Cr nanostructures and deducing their magnetic anisotropy

et al. 2021

View full text Add to dashboard Cite

Understanding the efects of interparticle interactions is a vital problem because magnetic nanoparticles showcase a variety of magnetic conigurations due to diferent contributions to their total energy. To derive reliable and robust properties from magnetic nanoparticles, it is, thus, necessary to understand the competition between particle anisotropy and interparticle interactions that deine the magnetic state of nanoparticles, where size control plays an important role. Here, we apply the random anisotropy model (RAM) that considers various magnetic interactions to selectively prepared NiCr nanostructures (NiCr dense nanoclusters, nanogranular NiCr thin ilms, and Ag(NiCr) nanocomposites) with diferent interparticle interactions. The estimated single-particle magnetic anisotropy K values (2.82 − 12.3 × 10 4 J/m 3 ) and careful analysis of magnetization behavior for these nanostructures reveal that orbital hybridization, surface segregation, and interface character govern the magnetic interactions among nanoparticles. Our study demonstrates how magnetic behaviors vary in these diferent magnetic systems consisting of superparamagnetic (SPM) and ferromagnetic (FM) contributions speciic to magnetic interactions.

show abstract

“…34,35 The zero coercivity and remanence value of the magnetic nanomaterials were ideal for various biomedical applications. 41 The coercivity and remanence values of the HNTs-M-Tannic acid were obtained to be zero (Figure S4). Thus, the obtained VSM data confirmed the superparamagnetic nature of the HNTs-M-Tannic acid.…”

Section: Characterizations Of Hnts-m-tannic Acidmentioning

confidence: 99%

Halloysite Nanotubes Decorated with Fe₃O₄ Nanoparticles and Tannic Acid for Effective Inhibition of E. coli Biofilm

Bu,

Kim,

Sung

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

There is an urgent need to develop an efficient approach to limit biofilm formations. Recent progress in the biofilm treatment field showed remarkable utilization of emerging nanoformulations. In this study, we decorated clay halloysite nanotubules with tannic acid and Fe 3 O 4 Nanoparticles. The successful synthesis of the nanocomposite was validated by characterization techniques such as XRD, FE-SEM, HR-TEM, SEM-EDS, TEM-EDS, XPS, and VSM analysis. After successful characterizations of nanocomposite (HNTs-M-Tannic acid), antibiofilm effect analysis experiments such as Crystal Violet (CV) staining, biofilmforming marker gene expression analysis, morphology evaluation by SEM, and live and dead cell assay were performed. The Crystal Violet (CV) staining results concluded a significant 57.8% inhibition of the E. coli biofilm formation. Comprehensive gene expression analysis of f imA and csgA for E. coli biofilm formation confirmed the capacity of HNTs-M-Tannic acid to impede bacterial cell adhesion, thereby inhibiting biofilm formation. The SEM images and live and dead assay results confirmed and marked the potential of the developed HNTs-M-Tannic acid as an antibiofilm agent against E. coli. In conclusion, this study produced a unique nanocomposite, HNTs-M-Tannic acid, which offers potential as an economically viable, magnetically separable, and biocompatible nanoformulations for antibiofilm studies.

show abstract

Comprehensive structural and magnetic properties of iron oxide nanoparticles synthesized through chemical routes

Cited by 18 publications

References 39 publications

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

Design of various Ni–Cr nanostructures and deducing their magnetic anisotropy

Halloysite Nanotubes Decorated with Fe₃O₄ Nanoparticles and Tannic Acid for Effective Inhibition of E. coli Biofilm

Contact Info

Product

Resources

About

Comprehensive structural and magnetic properties of iron oxide nanoparticles synthesized through chemical routes

Cited by 18 publications

References 39 publications

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

A study on the effect of the collector properties on the fabrication of magnetic polystyrene nanocomposite fibers using the electrospinning technique

Design of various Ni–Cr nanostructures and deducing their magnetic anisotropy

Halloysite Nanotubes Decorated with Fe3O4 Nanoparticles and Tannic Acid for Effective Inhibition of E. coli Biofilm

Contact Info

Product

Resources

About

Halloysite Nanotubes Decorated with Fe₃O₄ Nanoparticles and Tannic Acid for Effective Inhibition of E. coli Biofilm