External magnetic field dependent light transmission and scattered speckle pattern in a magnetically polarizable oil-in-water nanoemulsion

2014 ◽  
Vol 454 ◽  
pp. 272-278 ◽  
Author(s):  
Surajit Brojabasi ◽  
B.B. Lahiri ◽  
John Philip
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Light Transmission ◽  
Speckle Pattern ◽  
Oil In Water ◽  
Field Dependent

scholarly journals Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1870
Author(s):  
Dmitry Borin ◽  
Robert Müller ◽  
Stefan Odenbach
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Magnetic Nanoparticles ◽  
External Magnetic Field ◽  
Shear Flow ◽  
Magnetic Fluid ◽  
Barium Hexaferrite ◽  
Dipole Interaction ◽  
Field Dependent ◽  
Fluid Behaviour

This paper presents the results of an experimental study of the influence of an external magnetic field on the shear flow behaviour of a magnetic fluid based on barium hexaferrite nanoplates. With the use of rheometry, the magnetoviscosity and field-dependent yield-stress in the fluid are evaluated. The observed fluid behaviour is compared to that of ferrofluids with magnetic nanoparticles having high dipole interaction. The results obtained supplement the so-far poorly studied topic of the influence of magnetic nanoparticles’ shape on magnetoviscous effects. It is concluded that the parameter determining the observed magnetoviscous effects in the fluid under study is the ratio V2/l3, where V is the volume of the nanoparticle and l is the size of the nanoparticle in the direction corresponding to its orientation in the externally applied magnetic field.

External magnetic field dependent shift of superparamagnetic blocking temperature due to core/surface disordered spin interactions

2017 ◽  
Vol 28 (7) ◽  
pp. 075710 ◽  
Author(s):  
Kwan Lee ◽  
Jung-tak Jang ◽  
Hiroshi Nakano ◽  
Shigeki Nakagawa ◽  
Sun Ha Paek ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Blocking Temperature ◽  
Core Surface ◽  
Spin Interactions ◽  
Field Dependent

Mechanism of external magnetic field dependent fluorescence decays of gaseous carbon disulfide

1992 ◽  
Vol 162 (1) ◽  
pp. 205-212 ◽  
Author(s):  
Yuichi Fujimura ◽  
Hisaharu Hayashi ◽  
Saburo Nagakura
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Carbon Disulfide ◽  
Field Dependent

External magnetic field dependent influence of lanthanide ions on the chemistry of radical pairs in micelles

1985 ◽  
Vol 120 (4-5) ◽  
pp. 397-400 ◽  
Author(s):  
Nicholas J. Turro ◽  
Xuegong Lei ◽  
Ian R. Gould ◽  
Matthew B. Zimmt
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Lanthanide Ions ◽  
Radical Pairs ◽  
Field Dependent

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.

A magnetic field-dependent modulation effect tends to stabilize light transmission through binary ferrofluids

2012 ◽  
Vol 285 (13-14) ◽  
pp. 3111-3115 ◽  
Author(s):  
Jian Li ◽  
Yueqiang Lin ◽  
Xiaodong Liu ◽  
Qingmei Zhang ◽  
Hua Miao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Light Transmission ◽  
Modulation Effect ◽  
Field Dependent

scholarly journals Origin of Magnetically Induced Optical Transmission of Magnetic Nanocomposite Films

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2533
Author(s):  
Qiushu Zhang ◽  
Bei Peng ◽  
Jintao Xu ◽  
Mengqi Chu
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Film Thickness ◽  
Optical Transmission ◽  
Light Transmission ◽  
Composite Films ◽  
Optical Transmittance ◽  
Nanocomposite Films ◽  
Magnetic Composite ◽  
Particle Movement

Herein, we present an investigation on the origin of the magnetically induced optical transmission of composite films comprised of polydimethylsiloxane and magnetic nanofillers via experiment and simulation. Structured and unstructured films were used in the study, which were fabricated with and without magnetic fields, respectively. Altered optical transmittance was observed from both types of films when they were subjected to an external magnetic field. Numerical analyses were performed to investigate the effect of the particle movement under magnetic field and the film magnetostriction on the film optical transmittance. The simulation results show that the changed light transmission under magnetic field is mainly due to a variation in the film thickness resulting from the film magnetostriction. The ellipsometric analysis results confirm the altered film thickness in response to the external magnetic field, and the measurements of the film magnetostrictive stresses validate that there is magnetostriction in the magnetic composite films. Additionally, it is indicated that there might be some relationship between the magnetically induced optical transmission and the film magnetostrictive stress under certain conditions.

Fabrication of Novel Magnetic Janus Microparticles

2008 ◽  
Vol 1135 ◽  
Author(s):  
Amro K. F. Dyab ◽  
Vesselin N. Paunov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetite Nanoparticles ◽  
Janus Particles ◽  
Ferromagnetic Behavior ◽  
Water Emulsion ◽  
Novel Technique ◽  
Oil In Water ◽  
Magnetic Filed ◽  
Oil In Water Emulsion

ABSTRACTWe have designed a novel technique for fabrication of magnetic Janus microparticles based on “trapping” the alignment of magnetite nanoparticles dispersed within the oil drops of polymerizable oil-in-water emulsion. We polymerized the oil drops after gelling the continuous aqueous phase in the presence of an external magnetic filed. This allowed us to produce magnetic Janus particles with optical and magnetic anisotropy which form unusual zigzag chains and structures when an external magnetic field is applied to a suspension of such particles. These novel microparticles retain high remanence magnetization and coercivity values indicative of ferromagnetic behavior, which indicates that the composite polymeric Janus microparticles posses a net magnetic dipole and behave like micro-magnets due to the “trapped” orientation of the magnetite nanoparticles in their polymeric matrix.

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