scholarly journals Structural control of magnetite nanoparticles for hyperthermia by modification with organic polymers: effect of molecular weight

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26374-26380 ◽  
Author(s):  
Toshiki Miyazaki ◽  
Takayuki Tange ◽  
Masakazu Kawashita ◽  
Balachandran Jeyadevan
Keyword(s):  
Molecular Weight ◽  
Magnetic Properties ◽  
Crystalline Structure ◽  
Magnetite Nanoparticles ◽  
Structural Control ◽  
Functional Group ◽  
Organic Polymers

Crystalline structure and magnetic properties of magnetite nanoparticles are highly governed by functional group and molecular weight of the added polymers.

Magnetic properties of bacterial magnetosomes and chemosynthesized magnetite nanoparticles

2008 ◽  
Vol 44 (2) ◽  
pp. 113-120 ◽  
Author(s):  
M. Timko ◽  
A. Dżarová ◽  
V. Závišová ◽  
M. Koneracká ◽  
A. Šprincová ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetite Nanoparticles

scholarly journals Effects of Molecular Weight of Functionalized Liquid Butadiene Rubber as a Processing Aid on the Properties of SSBR/Silica Compounds

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 850
Author(s):  
Donghyuk Kim ◽  
Byungkyu Ahn ◽  
Kihyun Kim ◽  
JongYeop Lee ◽  
Il Jin Kim ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Anionic Polymerization ◽  
High Performance ◽  
Crosslink Density ◽  
Functional Group ◽  
Vital Role ◽  
Butadiene Rubber ◽  
Molecular Weights ◽  
Mooney Viscosity ◽  
Silica Dispersion

Liquid butadiene rubber (LqBR) which used as a processing aid play a vital role in the manufacturing of high-performance tire tread compounds. However, the studies on the effect of molecular weight, microstructure, and functionalization of LqBR on the properties of compounds are still insufficient. In this study, non-functionalized and center-functionalized liquid butadiene rubbers (N-LqBR and C-LqBR modified with ethoxysilyl group, respectively) were synthesized with low vinyl content and different molecular weights using anionic polymerization. In addition, LqBR was added to the silica-filled SSBR compounds as an alternative to treated distillate aromatic extract (TDAE) oil, and the effect of molecular weight and functionalization on the properties of the silica-filled SSBR compound was examined. C-LqBR showed a low Payne effect and Mooney viscosity because of improved silica dispersion due to the ethoxysilyl functional group. Furthermore, C-LqBR showed an increased crosslink density, improved mechanical properties, and reduced organic matter extraction compared to the N-LqBR compound. LqBR reduced the glass transition temperature (Tg) of the compound significantly, thereby improving snow traction and abrasion resistance compared to TDAE oil. Furthermore, the energy loss characteristics revealed that the hysteresis loss attributable to the free chain ends of LqBR was dominant.

A mixture of ferritin and magnetite nanoparticles mimics the magnetic properties of human brain tissue

2006 ◽  
Vol 73 (22) ◽  
Author(s):  
Franziska Brem ◽  
Louis Tiefenauer ◽  
Alke Fink ◽  
Jon Dobson ◽  
Ann M. Hirt
Keyword(s):  
Magnetic Properties ◽  
Human Brain ◽  
Brain Tissue ◽  
Magnetite Nanoparticles ◽  
Human Brain Tissue

Greener synthesis of magnetite nanoparticles using green tea extract and their magnetic properties

2017 ◽  
Vol 4 (9) ◽  
pp. 096102 ◽  
Author(s):  
V C Karade ◽  
P P Waifalkar ◽  
T D Dongle ◽  
Subasa C Sahoo ◽  
P Kollu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Green Tea ◽  
Magnetite Nanoparticles ◽  
Green Tea Extract ◽  
Greener Synthesis ◽  
Tea Extract

Synthesis of Magnetite Nanoparticles in Pores of Mesoporous Silica MSM-41 and Study of Their Magnetic Properties

2018 ◽  
Vol 88 (10) ◽  
pp. 2216-2218
Author(s):  
E. G. Zemtsova ◽  
A. Yu. Arbenin ◽  
A. N. Ponomareva ◽  
V. M. Smirnov
Keyword(s):  
Magnetic Properties ◽  
Mesoporous Silica ◽  
Magnetite Nanoparticles

Influence of the Laser Repetition Rate on Crystalline Structure, Composition and Magnetic Properties of Laser Deposited Y3Fe5O12/Gd3Ga5O12(111) Films

2002 ◽  
Vol 720 ◽  
Author(s):  
S. Kahl ◽  
V.P. Denysenkov ◽  
S.I. Kranzusch ◽  
A.M. Grishin
Keyword(s):  
Surface Roughness ◽  
Magnetic Properties ◽  
Crystalline Structure ◽  
Coercive Field ◽  
Repetition Rate ◽  
The Other ◽  
Laser Deposition ◽  
Laser Repetition Rate ◽  
Experimental Parameters ◽  
Annealing Experiments

AbstractY3Fe5O12 (YIG) films have been deposited onto single crystal Gd4Ga5O12(GGG) substrates by publsed laser deposition. For a given set of experimental parameters, the oxygen background pressure and substrate tempetature were optimized to achieve the narrowest ferromagnetic resonance (FMR) lines. The repetition rate was then varied from 10 to 50 Hz. There is a cleasr transition from films with low saturation magnetization 4πMs ≈ 300 Gs, high coercive fields Hc > 20 Oe, and broad FMR lines ΔH > 100 Oe to films with 4πMs ≈ 1400Gs, Hc < 10 Oe, and ΔH ≤ 10 Oe. This crossover occurs when the laser repetition rate is changed from 20 to 30 Hz. No significant differences could be detected in any of the other investigated properties: crystalline structure, cation concentration rastio, amd surface roughness do not depend on the repetition rate. Annealing experiments show that the films deposited at 10 and 20 Hz repetition rate are oxygen deficent. We loaded the film deposited at 20 Hz with oxygen, so that it reached the bulk value for 4πMs. The coercive field, however, remained large.

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