Fabrication of magnetite nanorods by ultrasound irradiation

Kumar, R. Vijaya; Koltypin, Yuri; Xu, X.N.; Yeshurun, Y.; Gedanken, Aharon; Felner, I.

doi:10.1063/1.1369408

Cited by 168 publications

(92 citation statements)

References 39 publications

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“…Gedanken and coworkers have reported various nanostructured metal oxide syntheses including TiO 2 , [50] Fe 3 O 4 , [51] a-Ni(OH) 2 , [52] GaO(OH), [53] In(OH) 3 , [54] and BaFe 12 O 19 . [55] In their syntheses, sonication of an aqueous metal salt solution is carried out under ambient conditions (usually in the presence of air) to prepare various forms of nanostructured metal oxides.…”

Section: Metal Oxidesmentioning

confidence: 99%

Applications of Ultrasound to the Synthesis of Nanostructured Materials

2010

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Recent advances in nanostructured materials have been led by the development of new synthetic methods that provide control over size, morphology, and nano/microstructure. The utilization of high intensity ultrasound offers a facile, versatile synthetic tool for nanostructured materials that are often unavailable by conventional methods. The primary physical phenomena associated with ultrasound that are relevant to materials synthesis are cavitation and nebulization. Acoustic cavitation (the formation, growth, and implosive collapse of bubbles in a liquid) creates extreme conditions inside the collapsing bubble and serves as the origin of most sonochemical phenomena in liquids or liquid-solid slurries. Nebulization (the creation of mist from ultrasound passing through a liquid and impinging on a liquid-gas interface) is the basis for ultrasonic spray pyrolysis (USP) with subsequent reactions occurring in the heated droplets of the mist. In both cases, we have examples of phase-separated attoliter microreactors: for sonochemistry, it is a hot gas inside bubbles isolated from one another in a liquid, while for USP it is hot droplets isolated from one another in a gas. Cavitation-induced sonochemistry provides a unique interaction between energy and matter, with hot spots inside the bubbles of approximately 5000 K, pressures of approximately 1000 bar, heating and cooling rates of >10(10) K s(-1); these extraordinary conditions permit access to a range of chemical reaction space normally not accessible, which allows for the synthesis of a wide variety of unusual nanostructured materials. Complementary to cavitational chemistry, the microdroplet reactors created by USP facilitate the formation of a wide range of nanocomposites. In this review, we summarize the fundamental principles of both synthetic methods and recent development in the applications of ultrasound in nanostructured materials synthesis.

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Section: Metal Oxidesmentioning

confidence: 99%

Applications of Ultrasound to the Synthesis of Nanostructured Materials

2010

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“…Using a sonochemical method, magnetite nanorods were successfully prepared starting from iron (II) acetate in the presence of b-cyclodextrin. [118] Magnetite nanodiscs were obtained on a large scale by a surfactant-assisted solvothermal process. [119] Composites Corr et al [120] fabricated silica-iron oxide nanocomposites via sol-gel one-step processing of an Fe(II) alkoxide and tetraethyl orthosilicate at various ratios.…”

Section: Iron Cobalt and Nickelmentioning

confidence: 99%

Physical Properties of Elongated Magnetic Particles: Magnetization and Friction Coefficient Anisotropies

2009

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β‐turns belong to the most important secondary structure elements in proteins. On the basis of density functional calculations, vibrational Raman optical activity signatures of different types of β‐turns are established and compared as well as related to other signatures proposed in the literature earlier. Our findings indicate that there are much more characteristic ROA signals of β‐turns than have been hitherto suggested. These suggested signatures are, however, found to be valid for the most important type of β‐turns. Moreover, we compare the influence of different amino acid side chains on these signatures and investigate the discrimination of β‐turns from other secondary structure elements, namely α‐ and 310‐helices.

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“…24 Unlike sonochemistry method for iron nanoparticles and nanorods synthesis, 25,26 this ultrasonic-assisted method produced nanoscaled and crystalline magnetic particles without using high temperature and pressure (e.g. 5000 K and 1800 atm) and the additional thermal annealing treatment.…”

Section: Characterizations For the Magnetic Particles Without Polymermentioning

confidence: 98%

Ultrasonic‐assisted Synthesis of Fe Nanoparticles in the Presence of Poly(N‐vinyl‐2‐pyrrolidone)

Zhang

Hsing

et al. 2011

Chin. J. Chem.

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Zero-valent iron particles were prepared by wet reduction chemistry assisted with ultrasonic treatment. Such prepared particles have uniform size, exhibit crystalline structure and show strong paramagnetic property. Their surface modification by coating poly(N-vinyl-2-pyrrolidone) (PVP) was investigated. The resulting Fe(0)-PVP particles were monodispersed and possessed enhancing magnetization saturation. Those synthesis conditions to control the particle size and distribution were exploited.

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Fabrication of magnetite nanorods by ultrasound irradiation

Cited by 168 publications

References 39 publications

Applications of Ultrasound to the Synthesis of Nanostructured Materials

Applications of Ultrasound to the Synthesis of Nanostructured Materials

Physical Properties of Elongated Magnetic Particles: Magnetization and Friction Coefficient Anisotropies

Ultrasonic‐assisted Synthesis of Fe Nanoparticles in the Presence of Poly(N‐vinyl‐2‐pyrrolidone)

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