Magnetic studies of layer-by-layer assembled polyvinyl alcohol/iron oxide nanofilms

2018 ◽  
Vol 20 (41) ◽  
pp. 26696-26709 ◽  
Author(s):  
Ewa Mosiniewicz-Szablewska ◽  
Antonia R. Clavijo ◽  
Ana P. O. R. Castilho ◽  
Leonardo G. Paterno ◽  
Marcelo A. Pereira-da-Silva ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Polyvinyl Alcohol ◽  
Substrate Surface ◽  
Magnetic Behavior ◽  
Surface Effects ◽  
Layer By Layer ◽  
Magnetic Studies

The importance of the substrate surface effects on the magnetic behavior of layer-by-layer assembled polyvinyl alcohol/iron oxide nanofilms is evidenced.

Preparation and physical characterization of cobalt iron oxide magnetic nanoparticles loaded polyvinyl alcohol

2021 ◽  
pp. 089270572098557
Author(s):  
M Abu-Abdeen ◽  
O Saber ◽  
E Mousa
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Polyvinyl Alcohol ◽  
Saturation Magnetization ◽  
Polymer Films ◽  
Magnetic Hysteresis ◽  
Thermal Method ◽  
Cobalt Iron Oxide ◽  
Cobalt Iron ◽  
Iron Oxide Magnetic Nanoparticles

A solvent thermal method which depends on a thermal process under critical temperature and pressure was used to prepare cobalt iron oxide magnetic nanoparticles with a molar ratio 2. The prepared particles were in the form of nanoparticles with diameter ranging from 5 to 10 nm and with amorphous structure. Magnetic hysteresis behavior with saturation magnetization 36.31 emu/g and coercivity 4 Oe were observed for the nanoparticles. Polyvinyl alcohol was loaded with different concentrations of cobalt iron oxide nanoparticles using casting technique. Hysteresis loops for the polymer films were observed and both the saturation magnetization and coercivity were increased from 0.36 to 16.03 emu/g and 115 to 293 Oe for samples containing 5 and 20 wt% of nanoparticles, respectively. The elastic modulus of films was increased from 2.7 to 4.9 GPa for unloaded and loaded samples with 20 wt%, respectively. The storage modulus of the polymer films was found to obey the percolation behavior.

Synthesis of Iron Oxide Nanoparticles by Different Methods and Study of their Properties

2015 ◽  
Vol 230 ◽  
pp. 108-113 ◽  
Author(s):  
O.V. Yelenich ◽  
S.O. Solopan ◽  
T.V. Kolodiazhnyi ◽  
Jean Marc Greneche ◽  
Anatolii G. Belous
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Zero Field ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Brij 35 ◽  
Cryochemical Synthesis ◽  
Specific Loss Power ◽  
Triton X

In this work, iron oxide nanoparticles have been synthesized by precipitation in diethylene glycol, by cryochemical synthesis, in microemulsions using surfactants Triton X-100, Brij-35 and CTAB. Comparative spectroscopic, thermal, X-ray diffraction, 57Fe zero-field Mössbauer and magnetic studies of the synthesized nanoparticles have been carried out. Magnetic fluids prepared from synthesized nanopowders have been characterized by calorimetric measurements of specific loss power (SLP).

Surface effects on the magnetic behavior of antiferromagnetic particles

1998 ◽  
Vol 84 (5) ◽  
pp. 2795-2800 ◽  
Author(s):  
K. N. Trohidou ◽  
X. Zianni ◽  
J. A. Blackman
Keyword(s):  
Magnetic Behavior ◽  
Surface Effects

Layer-by-layer assembled hybrid film of carbon nanotubes/iron oxide nanocrystals for reagentless electrochemical detection of H2O2

2009 ◽  
Vol 138 (1) ◽  
pp. 182-188 ◽  
Author(s):  
Yuqing Miao ◽  
Hua Wang ◽  
Yuyan Shao ◽  
Zhiwen Tang ◽  
Jun Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Iron Oxide ◽  
Electrochemical Detection ◽  
Hybrid Film ◽  
Layer By Layer

scholarly journals Hierarchical synthesis of iron oxide nanoparticles by polyol cum Calcination Method and determination of its optical and magnetic behavior

2020 ◽  
Vol 249 ◽  
pp. 122950
Author(s):  
Affia Saddique ◽  
Zahoor Ahmad ◽  
Clare Hoskins ◽  
Muhammad Aslam Mirza ◽  
Asima Naz ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Behavior ◽  
Oxide Nanoparticles ◽  
Calcination Method

Iron Oxide Nanoparticles Obtained from a Fe(II) - Chitosan Polymer Film

2010 ◽  
Vol 644 ◽  
pp. 51-55 ◽  
Author(s):  
Juan Fco Luna Martínez ◽  
E. Reyes-Melo ◽  
Virgilio González-González ◽  
A. Torres-Castro ◽  
Carlos Guerrero-Salazar ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Composite Film ◽  
Polymer Film ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Behavior ◽  
Nanostructured Material ◽  
Oxide Nanoparticles ◽  
Transmission Electron ◽  
Alkaline Conditions

In this work, iron oxide nanoparticles (~5 nm) embedded in a chitosan polymer film, were synthesized. In order to obtain this nanostructured material, firstly a homogenous film of Fe(II)-chitosan was prepared. The resulting composite film has a thickness of ~140μm. Iron oxide nanoparticles were in-situ synthesized by treating the composite film with H2O2 under alkaline conditions. The morphological analysis by Transmission Electron Microscopy (TEM) shows the nanoparticles were embedded and stabilized in chitosan polymer film. The magnetic behavior was studied by magnetization measurements. The magnetization curves at room temperature showed that iron oxide nanoparticles have a superparamagnetic behavior.

Supercapacitor with extraordinary cycling stability and high rate from nano-architectured polyaniline/graphene on Janus nanofibrous film with shape memory

2018 ◽  
Vol 6 (42) ◽  
pp. 21064-21077 ◽  
Author(s):  
Ali Khosrozadeh ◽  
Gurankit Singh ◽  
Quan Wang ◽  
Gaoxing Luo ◽  
Malcolm Xing
Keyword(s):  
Polyvinyl Alcohol ◽  
Shape Memory ◽  
High Power ◽  
Rate Capability ◽  
Cycling Stability ◽  
High Rate ◽  
Layer By Layer ◽  
Flexible Electrodes

Layer-by-layer polyaniline–graphene on multifunctional polyvinyl alcohol nanofibers leads to extremely stable flexible electrodes with high power and rate capability.

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