Measurements of rotary and translation diffusion of magnetite nanoparticles in hydrocarbon based magnetic fluid

2005 ◽  
Vol 41 (4) ◽  
pp. 353-360 ◽  
Keyword(s):  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Translation Diffusion

scholarly journals Frequency dependence of magnetothermal properties for magnetic fluid and magnetically functionalized implants

2018 ◽  
Vol 185 ◽  
pp. 09003
Author(s):  
R.T. Salakhova ◽  
A. G. Vylegzhanin ◽  
E.A. Kashtanov ◽  
V.I. Zverev ◽  
R. Müller ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Frequency Dependence ◽  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Polymer Coating ◽  
Experimental Setup ◽  
Ac Magnetic Field ◽  
Magnetic Heating ◽  
Magnetite Particles

Heating of the magnetic nanoparticles in AC magnetic field is the effect promising for application in medicine. The mechanisms of heating in AC-magnetic field implies nontrivial dependence of the power dissipated by magnetic nanoparticles on frequency. With the use of a reconfigurable experimental setup, this frequency-dependent magnetic heating was measured on two characteristic examples: the magnetite nanoparticles conventionally used in medicine and polymer coating with micrometer sized magnetite particles. The saturation of the heating power with frequency is shown that is more pronounced for the second case of microparticles.

Heat dissipation mechanism of magnetite nanoparticles in magnetic fluid hyperthermia

2009 ◽  
Vol 321 (10) ◽  
pp. 1493-1496 ◽  
Author(s):  
Makoto Suto ◽  
Yasutake Hirota ◽  
Hiroaki Mamiya ◽  
Asaya Fujita ◽  
Ryo Kasuya ◽  
...  
Keyword(s):  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Heat Dissipation ◽  
Magnetic Fluid Hyperthermia ◽  
Dissipation Mechanism

Determination of Magnetic Moments of Magnetite Nanoparticles Aggregates by Optical Methods

2009 ◽  
Vol 152-153 ◽  
pp. 163-166
Author(s):  
Constantine V. Yerin
Keyword(s):  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Magnetic Moments ◽  
Optical Methods ◽  
Magnetic Birefringence

Magnetic birefringence in kerosene based magnetic fluid in variable and pulsing field is investigated. It is shown, that the size of aggregates of defining effect is about 70 nanometers. The absence of spontaneous magnetisation at such aggregates is installed. The value of the parameter connecting the permanent and induced magnetic moments of the aggregate of nanoparticles is experimentally defined.

A novel magnetic fluid based on starch-coated magnetite nanoparticles functionalized with homing peptide

2008 ◽  
Vol 11 (6) ◽  
pp. 1321-1330 ◽  
Author(s):  
Ji-Sen Jiang ◽  
Zhi-Feng Gan ◽  
Yong Yang ◽  
Bing Du ◽  
Min Qian ◽  
...  
Keyword(s):  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Homing Peptide

Casimir repulsion though a water-based ferrofluid

2020 ◽  
Vol 35 (03) ◽  
pp. 2040016 ◽  
Author(s):  
E. N. Velichko ◽  
G. L. Klimchitskaya ◽  
E. K. Nepomnyashchaya
Keyword(s):  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Volume Fraction ◽  
Drude Model ◽  
Optical Data ◽  
Separation Region ◽  
Numerical Computations ◽  
Low Frequencies ◽  
Water Based

We investigate the Casimir pressure between two dissimilar plates separated by a layer of magnetic fluid. Numerical computations of the Casimir pressure are performed for Au and SiO2 plates with an intervening layer of water and water-based ferrofluid obtained on addition to water a 5% volume fraction of magnetite nanoparticles with 10 nm diameter. It is shown that an addition of nanoparticles leads to a widening of separation region, where the Casimir interaction is repulsive. This result does not depend on whether the plasma or the Drude model is used for extrapolation of the optical data of Au to low frequencies. The effect of enhanced repulsion due to the presence of ferrofluid may be useful for preventing stiction of closely spaced elements in various microdevices.

A magnetic super lattice

1987 ◽  
Vol 45 ◽  
pp. 360-361 ◽  
Author(s):  
M.D. Bentzon ◽  
J. v. Wonterghem ◽  
A. Thölén
Keyword(s):  
Thermal Decomposition ◽  
Oleic Acid ◽  
Magnetic Fluid ◽  
Magnetic Particles ◽  
Carbon Film ◽  
Thick Layer ◽  
Amorphous Iron ◽  
Super Lattice ◽  
Carrier Liquid ◽  
Median Diameter

We report on the oxidation of a magnetic fluid. The oxidation results in magnetic super lattice crystals. The “atoms” are hematite (α-Fe2O3) particles with a diameter ø = 6.9 nm and they are covered with a 1-2 nm thick layer of surfactant molecules.Magnetic fluids are homogeneous suspensions of small magnetic particles in a carrier liquid. To prevent agglomeration, the particles are coated with surfactant molecules. The magnetic fluid studied in this work was produced by thermal decomposition of Fe(CO)5 in Declin (carrier liquid) in the presence of oleic acid (surfactant). The magnetic particles consist of an amorphous iron-carbon alloy. For TEM investigation a droplet of the fluid was added to benzine and a carbon film on a copper net was immersed. When exposed to air the sample starts burning. The oxidation and electron irradiation transform the magnetic particles into hematite (α-Fe2O3) particles with a median diameter ø = 6.9 nm.

Study on Cancer Treatment using Magnetic Fluid for Medicine and Induction Heating Device

2013 ◽  
Vol 133 (6) ◽  
pp. 366-371 ◽  
Author(s):  
Hideo Nagae ◽  
Sotoshi Yamada ◽  
Yoshio Ikehata ◽  
Satoshi Yagitani ◽  
Isamu Nagano
Keyword(s):  
Cancer Treatment ◽  
Induction Heating ◽  
Magnetic Fluid ◽  
Heating Device
Sign in / Sign up

Export Citation Format

Share Document