Estimation of the size distribution of magnetic nanoparticles using modified magnetization curves

2009 ◽  
Vol 20 (12) ◽  
pp. 125802 ◽  
Author(s):  
Wenzhong Liu ◽  
Ming Zhou ◽  
Li Kong
Keyword(s):  
Magnetic Nanoparticles ◽  
Size Distribution ◽  
Magnetization Curves

scholarly journals Determining the size distribution of magnetic nanoparticles based on analysis of magnetization curves

2009 ◽  
Vol 106 (10) ◽  
pp. 103905 ◽  
Author(s):  
Su-Peng Yu ◽  
Yi-Hsien Liu ◽  
An-Cheng Sun ◽  
Jen-Hwa Hsu
Keyword(s):  
Magnetic Nanoparticles ◽  
Size Distribution ◽  
Magnetization Curves

The Influence of Water Content on the Morphology and Magnetic Properties of Nickel Nanoparticles Prepared in Reverse Microemulsion

2011 ◽  
Vol 287-290 ◽  
pp. 494-498 ◽  
Author(s):  
Qiong Zhou ◽  
Yin Chun Hu ◽  
Yu Liang Ma ◽  
Yong Ji Weng
Keyword(s):  
Magnetic Properties ◽  
Water Content ◽  
Size Distribution ◽  
Nickel Nanoparticles ◽  
Reducing Agent ◽  
Reverse Microemulsion ◽  
High Coercivity ◽  
Ferromagnetic Behavior ◽  
Magnetization Curves ◽  
Influence Of Water

Magnetic nickel nanoparticles are prepared by NaBH4reducing agent in AOT reverse microemulsion, the influence of water content on the morphology and magnetic properties of nickel nanoparticles are investigated by TEM study, size distribution, XRD characterization and magnetization curves. The results show that spherical and polydispered particles are obtained in microemulsion. The dimension and polydispersity of particles increased with the increasing of water content. Magnetization curves clearly indicate a ferromagnetic behavior with high coercivity values. At water content of W0=41.7, the product has a high saturated magnetization 70.68 emu/g with its residual magnetizations 28.02 emu/g, higher than the sample obtained at water content of W0=13.9.

Empirical expression for harmonics of AC magnetization of magnetic nanoparticles with core size distribution

2019 ◽  
Vol 58 (9) ◽  
pp. 097003 ◽  
Author(s):  
Zhongzhou Du ◽  
Yi Sun ◽  
Oji Higashi ◽  
Keiji Enpuku ◽  
Takashi Yoshida
Keyword(s):  
Magnetic Nanoparticles ◽  
Size Distribution ◽  
Core Size ◽  
Empirical Expression ◽  
Ac Magnetization

Biodegradation of Nanoparticles in a Body from Mössbauer and Magnetization Measurements

2012 ◽  
Vol 190 ◽  
pp. 725-728 ◽  
Author(s):  
Mikhail Chuev ◽  
Valery Cherepanov ◽  
Maxim P. Nikitin ◽  
Mikhail Polikarpov
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Magnetic Nanoparticles ◽  
External Magnetic Field ◽  
Chemical Transformation ◽  
Living Organism ◽  
Quantitative Information ◽  
Spectral Shape ◽  
Magnetization Curves ◽  
Field Dependent

In order to extract a quantitative information about characteristics of the magnetic nanoparticles injected into a living organism one has to define a model of the magnetic dynamics in order to fit self-consistently the whole set of the experimental data, particularly, the evolution of Mössbauer spectral shape with temperature and external magnetic field as well as the magnetization curves. We have developed such a model and performed such an analysis of the temperature-and magnetic field-dependent spectra and magnetization curves of nanoparticles injected into a mice. This allowed us to reliably evaluate changes in the residual nanoparticles characteristics and their chemical transformation to paramagnetic ferritin-like forms in different mouses organs as a function of time after injection of nanoparticles. Actually, the approach allows one to quantitatively characterize biodegradation and biotransformation of magnetic nanoparticles injected into a body.

Optimizing degradation conditions on treatment of TATB explosive wastewater by γ-Fe2O3 nanoparticles/ UV synergistic degradation

2020 ◽  
Author(s):  
Xiaonan Liu ◽  
Yuedan Deng ◽  
Chaorong Zhang ◽  
xueyuan bai ◽  
Jinshan Li
Keyword(s):  
Magnetic Nanoparticles ◽  
Reaction Time ◽  
Size Distribution ◽  
Uv Light ◽  
Fe2o3 Nanoparticles ◽  
Hydrolysis Method ◽  
Uv Illumination ◽  
Synergistic Degradation ◽  
Optimized Conditions ◽  
Superparamagnetic Properties

In this work, the effect of superparamagnetic γ-Fe2O3 nanoparticles/ ultraviolet light (UV) synergistic degradation on the treatment of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) explosive wastewater was studied. γ-Fe2O3 nanoparticles were prepared by hydrolysis method and its degradation performance of TATB explosive wastewater was systematically studied with UV light assisted. The results showed that γ-Fe2O3 magnetic nanoparticles have low a size distribution ranged from 5 nm to 10 nm and possesses superparamagnetic properties. The optimized degradation condition was investigated and best degradation performance was obtained with the optimized conditions: the initial of pH=3, UV illumination intensity (5 w/cm2), reaction temperature (25 °C), initial TOC concentration (4.025 mg/L) as well as reaction time (60 min). This work can offer a new idea to degrade the explosive wastewater.

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