Effect of ferrofluid concentration on electrical and magnetic properties of the Fe3O4/PANI nanocomposites

Alam, Javed; Riaz, Ufana; Ahmad, Sharif

doi:10.1016/j.jmmm.2007.02.195

Cited by 105 publications

(44 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 The properties of these nanocomposites are quite different from pristine PANI due to interfacial interactions between metal oxide nanoparticles and PANI macromolecules. 11,12 The composite properties can be easily adjusted to the desired applications via the variation of particle size, shape and the distribution of nanoparticles. 13,14 Consequently, PANI may have potential applications in electrical nanodevices.…”

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

View full text Add to dashboard Cite

The polyaniline/copper oxide (PANI/CuO) nanocomposite was prepared by mixing solutions of polyaniline and copper oxide nanoparticles in dimethyl sulfoxide (DMSO). The synthesized polymer nanocomposites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. The characteristic peaks in XRD and UVvisible spectra confirmed the presence of CuO in the polymer structure. SEM images indicated morphological changes in the composite matrix as compared to the pristine PANI. The DC conductivity measurements were performed using two-probe method for various temperatures. AC conductivity and dielectric response of the composites were investigated in the frequency range of 10 2 -10 6 Hz using LCR meter. Dielectric permittivity 0 ðwÞ and dielectric loss factor 00 ðwÞ were investigated. It was observed that 0 ðwÞ and 00 ðwÞ decrease with increase in frequency at all temperatures. At a particular frequency it is observed that both 0 ðwÞ and 00 ðwÞ increase with increase in temperature. It was also observed that AC conductivity increased with increase in frequency and temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

View full text Add to dashboard Cite

show abstract

“…Aphesteguy et al reported preparation and characterization of Ni-Gd ferrite polyaniline composite of both conducting and ferromagnetic characterizations [9]. Alam et al reported the effect of ferrofluid concentration on electrical and magnetic properties of the Fe 3 O 4 / PANI nanocomposites [10]. As far as the composites were concerned, phase separation was a commonplace due to their poor compatibility between polymer matrix and inorganic particles [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties on polyaniline in the presence of nickel chloride

Tan¹,

Zhang²,

Kan³

2009

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Both Conducting and Ferromagnetic polyaniline containing nickel (abbreviated as PANI-Ni) is synthesized in a solution containing aniline, HCl and NiCl2, using peroxydisulphate as an oxidant and horseradish peroxidase as a catalyst. The conductivity of PANI-Ni is about 10 -1 S cm -1 . The result of electron paramagnetic resonance (EPR) spectra indicated that there were unpaired electrons in PANI-Ni, and the spin density of the PANI-Ni was 1.09·10 19 spins g -1 . The plot of magnetization (M) against the magnetic field (H) indicated that the PANI-Ni was soft ferromagnetic at about 300 K, the saturation magnetization (Ms) and the coercive force (Hc) of which were 4.5 emu g -1 (electromagnetic unit per gram) and about 55 Oe, respectively. UV-Visible (UV-vis) and Fourier Transform Infrared (FTIR) spectra showed that there was strong interaction between Ni 2+ and PANI chains, but the backbone chains of PANI-Ni were hardly changed compared with PANI. Cyclic voltammogram results indicated that the PANI-Ni film was of excellent electrochemical activity.

show abstract

“…The saturation magnetization (M S ) for the Fe 2 O 3 NPs is 64.4 emu/g, whereas the saturation magnetization of the EAPM-NPs is 44.1 emu/g. The decrease in M S value for the EAPM-NPs is expected due to surface interactions between the polymer (polyaniline) which is diamagnetic in nature, and iron oxide NPs [124]. The remanent magnetization M r for the Fe 2 O 3 and the EAPM-NPs are 14.2 and 10.4 emu/g, respectively, and the coercive force H c for both NPs is 200 Oe.…”

Section: Integrated Extraction/detection Magnetic Nanoparticle-based mentioning

confidence: 96%

Microbiological Detectors for Food Safety Applications

Alocilja

Pal

2008

Wiley Handbook of Science and Technology for Homeland Security

View full text Add to dashboard Cite

The use of microorganisms as biological weapons has long been reported in history. The most recent was the deliberate release of B. anthracis spores through the postal system in the United States in October 2001, resulting in 22 cases of anthrax and five deaths. Furthermore, there are up to 33 million cases of human illness each year from microbial pathogens in the food supply in the United States alone, with an associated cost of $2‐4 billion in 2006. The complexity of the US food supply chain from cradle to grave provides numerous entry points and routes in which (inadvertent and intentional) contaminants and pathogens can be introduced into the nation's food system. Many of these pathogenic microorganisms have a very low infectious dose to cause fatality. The most vulnerable populations are the very young, the elderly, and immunocompromised individuals. Although highly sensitive, current methods of detection are laborious, require highly skilled personnel, and typically require 2–7 days to obtain conclusive results. Their results are not available in the time‐scale desired in food defense, food quality assurance, or clinical laboratory procedures, which have safety, cost, and quality implications. Rapid on‐site point‐of‐care detection methods for pathogens have hence become a necessity. Biosensors can play a major role in addressing the combined needs for near real‐time diagnosis, specificity, sensitivity, portability, electronic data transmission, field‐based, ease of use, and low cost requirements. This chapter presents biosensors for rapid microbial detection in complex food matrices of concern to homeland security and food safety.

show abstract

Effect of ferrofluid concentration on electrical and magnetic properties of the Fe3O4/PANI nanocomposites

Cited by 105 publications

References 28 publications

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Synthesis and properties on polyaniline in the presence of nickel chloride

Microbiological Detectors for Food Safety Applications

Contact Info

Product

Resources

About