Synthesis by in situ chemical oxidative polymerization and characterization of polyaniline/iron oxide nanoparticle composite

2010 ◽  
Vol 59 (12) ◽  
pp. 1690-1694 ◽  
Author(s):  
Aslam Khan ◽  
Abdullah S Aldwayyan ◽  
Mansour Alhoshan ◽  
Mohamad Alsalhi
Keyword(s):  
Iron Oxide ◽  
Oxidative Polymerization ◽  
Iron Oxide Nanoparticle ◽  
Chemical Oxidative Polymerization ◽  
Oxide Nanoparticle

scholarly journals Synthesis and Physical Characterization of Carbon Nanotubes Coated by Conducting Polypyrrole

2011 ◽  
Vol 364 ◽  
pp. 50-54 ◽  
Author(s):  
Afarin Bahrami ◽  
Z.A. Talib ◽  
W. Mahmood Mat Yunus ◽  
Kasra Behzad ◽  
Nayereh Soltani
Keyword(s):  
Carbon Nanotubes ◽  
Oxidative Polymerization ◽  
Feed Ratio ◽  
Multiwall Carbon Nanotube ◽  
Chemical Oxidative Polymerization ◽  
Conducting Polypyrrole ◽  
Multiwall Carbon ◽  
Thermal Stability Of

This study describes the preparation of polypyrrole multiwall carbon nanotube (PPy/MWNT) composites by in situ chemical oxidative polymerization. Various ratios of functionalized MWNTs are dispersed in the water, and PPy are then synthesized via in-situ chemical oxidative polymerization on the surface of the carbon nanotubes. The morphology of the resulting complex nanotubes (MWNT-PPY) was characterized by field-emission scanning electron microscopy (FESEM). The conductivity of each composite showed a maximum in the temperature scale of 120 – 160 °C and then decreased dramatically with the increase of temperature. The resultant PPy/MWNT nanotubes enhanced electrical conductivity and thermal stability of nanocomposite compared to PPy which was strongly influenced by the feed ratio of pyrrole to MWNTs.

Synthesis of spinel iron oxide nanoparticle/organic hybrid for hyperthermia

2008 ◽  
Vol 23 (12) ◽  
pp. 3415-3424 ◽  
Author(s):  
Koichiro Hayashi ◽  
Toshifumi Shimizu ◽  
Hidefumi Asano ◽  
Wataru Sakamoto ◽  
Toshinobu Yogo
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Photoelectron Spectroscopy ◽  
Iron Oxide Nanoparticle ◽  
Organic Hybrid ◽  
Oxide Nanoparticle ◽  
Hydrolysis Conditions ◽  
Size Controlled ◽  
Controlled Hydrolysis

Size-controlled spinel iron oxide (SIO) nanoparticle/organic hybrid was synthesized in situ from iron (III) allylacetylacetonate (IAA) at around 80 °C. The formation of SIO particles chemically bound with organics was confirmed by infrared and x-ray photoelectron spectroscopy. The sizes of SIO nanoparticles in the hybrids were monodispersed and ranged from 7 to 23 nm under controlled hydrolysis conditions. The hybrid including SIO particles of 7.3 nm was superparamagnetic, whereas those dispersed with particles above 11 nm were ferrimagnetic. The specific absorption rate (SAR) value was dependent upon the magnetic properties of the hybrid at 100 Oe. The SAR was 15.2 W g−1 in a 230 kHz alternating magnetic field and 100 Oe when the crystallite size of SIO particle in the hybrid was 16 nm. The temperatures of agars dispersed with hybrid powders of 5 and 8 mg ml−1 reached the optimum temperature (42 °C) for 17 and 8 min, respectively. The increase in temperature was controlled in terms of the strength of magnetic field. The simulation of heat transfer in the agar phantom model revealed that the suitable temperature distribution for therapy was attained from 15 to 20 min at 230 kHz and 100 Oe.

scholarly journals Field-scale demonstration of in situ immobilization of heavy metals by injecting iron oxide nanoparticle adsorption barriers in groundwater

2021 ◽  
Vol 237 ◽  
pp. 103741 ◽  
Author(s):  
Sadjad Mohammadian ◽  
Beate Krok ◽  
Andreas Fritzsche ◽  
Carlo Bianco ◽  
Tiziana Tosco ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Field Scale ◽  
In Situ Immobilization ◽  
Oxide Nanoparticle

Observing the colloidal stability of iron oxide nanoparticlesin situ

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 13098-13107 ◽  
Author(s):  
Ryan Hufschmid ◽  
Eric Teeman ◽  
B. Layla Mehdi ◽  
Kannan M. Krishnan ◽  
Nigel D. Browning
Keyword(s):  
Iron Oxide ◽  
Scanning Transmission Electron Microscopy ◽  
Colloidal Stability ◽  
Iron Oxide Nanoparticle ◽  
Nanoparticle Surface ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Liquid Cell ◽  
Oxide Nanoparticle

Iron oxide nanoparticle surface chemistry controls growth and dissolution, which are observed in real-time usingin situliquid cell Scanning Transmission Electron Microscopy (STEM).

Encapsulation of Superparamagnetic Iron Oxide Nanoparticles by the Supercritical Antisolvent Process

2012 ◽  
Vol 65 (1) ◽  
pp. 40 ◽  
Author(s):  
Un Teng Lam ◽  
Roshan Yoganathan ◽  
Adam G. Carr ◽  
Raffaella Mammucari ◽  
Neil R. Foster
Keyword(s):  
Iron Oxide ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Supercritical Antisolvent ◽  
Oxide Nanoparticle ◽  
Superparamagnetic Iron Oxide Nanoparticle ◽  
Toxic Organic Solvents ◽  
Superparamagnetic Properties ◽  
Product Solution

The aim of the experiments in this research was to produce a coated superparamagnetic iron oxide nanoparticle (SPION) product that may be used as a contrasting agent for MRI. There are several methods that can be employed to coat SPIONs. However, many of the current methods employ toxic organic solvents which can be difficult to remove from the product solution. The encapsulation and characterization of SPIONs in Eudragit was done using a supercritical antisolvent system (SAS) with ethanol as the solvent and supercritical carbon dioxide (SC-CO2) as the antisolvent. Particles of diameters less than 200 nm were produced which had preserved superparamagnetic properties. An encapsulation efficiency of 70 % was achieved.

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