Sonolytical preparation of various types of metal nanoparticles in aqueous solution

Fujimoto, Taku; Mizukoshi, Yoshiteru; Nagata, Yuki; Maeda, Yasuhiro; Oshima, Ryuichiro

doi:10.1016/s1359-6462(01)00900-9

Cited by 56 publications

(26 citation statements)

References 11 publications

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“…For this purpose variety of processes have been adopted [9][10][11][12][13] to generate nanoparticles of metals or alloys that have tailored properties but majority of these methods are either tiresome or have resulted in core-shell structure having metal/alloy core surrounded by the oxide shell. The use of surfactants or ligands has also been commonly employed that have enabled the fabrication of oxide free nanoparticles but with a trade off of modification in properties of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size and alloying with different metals on 57Fe Mössbauer spectra

et al. 2009

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Iron nanoparticles of various sizes have been synthesized using the chemical route which involves the preparation of iron bipyridine complexes in presence of different capping agents followed by thermal decomposition at 450 • C in inert atmosphere. The bimetallic nanoalloys of Fe with Mg and Pd have also been prepared by following the same route. The resulting nanoparticles have been characterized by EDX-RF, XRD, AFM and 57 Fe Mössbauer spectroscopy. The appearance of quadrupole doublets in the Mössbauer spectra of Fe nanoparticles indicates the absence of magnetic interaction and variation in parameters is due to the varying particle size. The Mössbauer spectrum of Fe-Mg 2 bimetallic nanoalloy shows two doublets indicating the presence of superparamagnetism. The two doublets can be attributed to change in s-electron density of iron resulting from its two neighboring magnesium atoms. Fe-Pd nanoalloy Mössbauer spectrum is characterized by having a superparamagnetic doublet and a ferromagnetic sextet.

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Section: Introductionmentioning

confidence: 99%

Effect of particle size and alloying with different metals on 57Fe Mössbauer spectra

et al. 2009

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“…[2,4] Over the past few years, sonochemical processing has proven to be a unique and effective technique for generating novel nanoparticles and one-dimensional nanofibers, nanowires and nanorods with unusual properties. [5,6] Here, we provide a new application for the synthesis of both polyaniline (PANI) nanotubes and nanofibers by doping different concentrations of mineral or organic acids under ultrasonic irradiation.…”

Section: Introductionmentioning

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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“…There are several reports available on Pnp and Rnp preparation [14,15]. Poly(vinylpyrrolidone) (PVP) (30 mg) was dissolved in 10 ml of ethylene glycol (EG) at room temperature under constant stirring.…”

Section: Preparation Of Platinum and Ruthenium Nanoparticles In Aqueomentioning

confidence: 99%

Studies on the platinum and ruthenium nanoparticles catalysed reaction of aniline with 4-aminoantipyrine in aqueous and microheterogeneous media

Santhanalakshmi

Kasthuri

Rajendiran

2007

Journal of Molecular Catalysis A: Chemical

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Sonolytical preparation of various types of metal nanoparticles in aqueous solution

Cited by 56 publications

References 11 publications

Effect of particle size and alloying with different metals on 57Fe Mössbauer spectra

Effect of particle size and alloying with different metals on 57Fe Mössbauer spectra

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

Studies on the platinum and ruthenium nanoparticles catalysed reaction of aniline with 4-aminoantipyrine in aqueous and microheterogeneous media

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