Electrical and magnetic properties of polyaniline/Fe3O4 nanostructures

Long, Yun-Ze; Chen, Zhaojia; Duvail, Jean‐Luc; Zhang, Zhiming; Wan, Meixiang

doi:10.1016/j.physb.2005.09.009

Cited by 153 publications

(69 citation statements)

References 57 publications

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“…[38] Assisted by the ultrasonic irradiation, PANI/Fe 3 O 4 composite nanotubes or nanorods were also produced. [39,40] In this paper, we explore the ultrasonic irradiation method to demonstrate that it is a general route to create both PANI nanotubes and nanofibers. This method does not require any specific dopant or template.…”

Section: Full Papermentioning

confidence: 99%

Fabrication of Polyaniline Nanostructures under Ultrasonic Irradiation: From Nanotubes to Nanofibers

Mao

Chao

et al. 2006

Macro Chemistry & Physics

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Summary: An ultrasonic irradiation assisted polymerization method has been used to prepare PANI nanotubes and nanofibers by using different doping concentrations of mineral or organic acids. It has been found that PANI nanotubes can be produced when the concentration of the dopant acid is low. However, PANI nanofibers can also be produced when the concentration of the dopant acid is high. For nanotubes synthesized at a low concentration of the dopant acid, the outer average diameter can be changed from about 150 nm using phosphoric acid to 200 nm using nitric acid as the dopant and the inter diameter is in the range of 10–50 nm. For nanofibers, the diameter ranges from about 50 nm using nitric acid to more than 110 nm using perchloric acid as the dopant. The mechanism of the formation of the nanotubes and nanofibers may be due to the formation of different kinds of micelles and the prevention of the second growth of the PANI by ultrasonic irradiation. The chemical structure of the PANI nanotubes and nanofibers are characterized by FTIR and UV‐vis absorption spectra and XRD patterns. The conductivity of the PANI nanofibers is comparable to that of conventional PANI samples.TEM images of PANI nanofibers synthesized under ultrasonic irradiation doped by perchloric acid.magnified imageTEM images of PANI nanofibers synthesized under ultrasonic irradiation doped by perchloric acid.

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Section: Full Papermentioning

confidence: 99%

Fabrication of Polyaniline Nanostructures under Ultrasonic Irradiation: From Nanotubes to Nanofibers

Mao

Chao

et al. 2006

Macro Chemistry & Physics

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“…[1] The magnetic properties of magnetite embedded into the polymeric matrix can also be used in magnetic filter and future generation of electronic, magnetic and photonic devices. [2] Several good review articles have been published on the synthesis, characterization and applications of this polymeric nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Photoinitiator‐Free UV‐Cured Acrylic Coatings Containing Magnetite Nanoparticles

Sangermano

Vescovo

Pepino

et al. 2010

Macro Chemistry & Physics

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A dispersion of magnetite nanoparticles in hexane has been added to 1,6‐hexanediol diacrylate at 5–40 phr. The obtained formulations have been polymerized by means of UV light in the absence of any radical photoinitiator and the cured films have been fully characterized. The photoinitiator activity of the magnetite nanoparticles is demonstrated: upon photoexcitation, Fe3O4 can generate radicals which in turn start polymerization chains. Isothermal magnetization curves showed that at room temperature, the cured material exhibits no hysteretic features, indicating a superparamagnetic‐like behavior. At temperatures below 100 K, a significant magnetic hysteresis gradually appears but a substantial fraction of magnetic nanoparticles is still in the superparamagnetic phase even at T = 10 K. magnified image

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“…6,7 A series of up to date methods have been reported for synthesizing micro-/nanotubes of conducting polymers, such as template synthesis, electrospining, chiral nematic reaction and molecular beam deposition. 8,9 However, template free method is an excellent route to synthesize the micro/nanotubes of conducting polymers because the micelle consists of dopant or dopant/aniline salt could act as a ''soft template'' in the formation of the nanostructured PAni by omitting the using of ''hard template'' (e.g. Al 2 O 3 or polycarbonate).…”

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confidence: 99%

Development and Investigation of Polyaniline Micro/nanocomposites that Possess Moderate Conductivity, Dielectric and Magnetic Properties

Phang

Kuramoto

2007

Polym J

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As a nano-material possessing moderate conductivity, magnetic and dielectric property, novel hexanoic acid doped polyaniline (PAni/HA) micro/nanocomposites containing TiO 2 and Fe 3 O 4 were prepared by template free method under various polymerization conditions. FT/IR spectra of PAni/HA/TiO C. PAni/HA polymerized at low temperature exhibited higher conductivity (1:0 Â 10 À3 S/cm) compared with PAni/HA polymerized at higher temperature (7:0 Â 10 À4 S/cm). The conductivities of the PAni/HA/TiO 2 and PAni/HA/TiO 2 /Fe 3 O 4 were relatively low (3:3{4:2 Â 10 À4 S/cm) after addition of TiO 2 and Fe 3 O 4 . PAni/HA/TiO 2 /Fe 3 O 4 micro/nanocomposites synthesized at 0 C exhibited higher magnetization (Ms = 7.7 emu/g) compare with micro/nanocomposites that synthesized at 25 C (Ms = 4.7 emu/g). TGA characterizations of the micro/nanocomposites were also being discussed in this paper.

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Electrical and magnetic properties of polyaniline/Fe3O4 nanostructures

Cited by 153 publications

References 57 publications

Fabrication of Polyaniline Nanostructures under Ultrasonic Irradiation: From Nanotubes to Nanofibers

Fabrication of Polyaniline Nanostructures under Ultrasonic Irradiation: From Nanotubes to Nanofibers

Photoinitiator‐Free UV‐Cured Acrylic Coatings Containing Magnetite Nanoparticles

Development and Investigation of Polyaniline Micro/nanocomposites that Possess Moderate Conductivity, Dielectric and Magnetic Properties

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