Magnetic and optical properties of Fe/sub 3/O/sub 4/ nanoparticle ferrofluids prepared by coprecipitation technique

Wu, Kun; Kuo, P. C.; Yao, Y. D.; Tsai, Esther H. R.

doi:10.1109/20.951263

Cited by 71 publications

(34 citation statements)

References 8 publications

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“…Due to their small size and SPM behavior, ferrofluids have been extensively used in several technological and biomedical applications [4][5][6][7]. Iron oxide (usually magnetite and maghemite) nanoparticles are mostly used as magnetic particles in ferrofluids due to their high saturation magnetization and high magnetic susceptibility [8][9][10]; the magnetite (Fe 3 O 4 ) particles are preferred because of their greater saturation magnetization [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The nanoparticles need to be stabilized in the carrier liquid because they tend to agglomerate due to Van der Waals forces.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of iron oxide nanoparticles under oxidizing environment and their stabilization in aqueous and non-aqueous media

Maity

Agrawal

2007

Journal of Magnetism and Magnetic Materials

567

243

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Section: Introductionmentioning

confidence: 99%

Synthesis of iron oxide nanoparticles under oxidizing environment and their stabilization in aqueous and non-aqueous media

Maity

Agrawal

2007

Journal of Magnetism and Magnetic Materials

567

243

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“…In the present work, however, the magnetic fibres were produced via the in situ synthesis of chemical coprecipitation technique by adding ferric (Fe 3+ ) and ferrous (Fe 2+ ) salts into the alkali solution under non oxidizing environment. This is the most common synthetic route to obtain magnetite particle compare with others, such as oxidation of Fe 2+ [10] , sol-gel method [11] and water-in-oil microemulsions [12] , in virtue of its simplicity and productivity [13][14][15][16] . The reaction involved in this process can be represented as below:…”

Section: Introductionmentioning

confidence: 99%

Preparation of Magnetic Paper from Kenaf: Lumen Loading and in situ Synthesis Method

Chia¹,

Zakaria²,

Ahamd³

et al. 2006

American J. of Applied Sciences

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Abstracts: Magnetic papers have been successfully prepared from unbleached kenaf (hibiscus cannabinus) kraft pulps via the lumen loading and in situ synthesis process. The lumen loading method allows the magnetic fillers to be introduced into the lumen of fibres and at the same time leaving the external surfaces free from filler, resulting the better inter-fibre bonding and subsequently its papermaking properties are not affected. Fillers, which deposited in the lumen of fibres will be protected from further mechanical influences. For the lumen loading process, commercial magnetite (Fe 3 O 4 ) powders have been introduced into the lumen by mixing the pulp and magnetic powder. For the in situ synthesis process, nanosized magnetite particles have been precipitated in the presence of pulp fibres and deposited inside the lumen of fibres via chemical coprecipitation process. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and their magnetization properties were examined by a vibrating sample magnetometer (VSM). The loading degree of the papers was estimated by using the Thermogravimetric analyzer (TGA). The VSM results show that the magnetic properties of the lumen loaded papers are higher compared to the in situ synthesis papers in which can be explained that the nanosized magnetite particles possess superparamagnetic properties. However, the SEM micrograph shows that the size and the distribution of the magnetic particles inside the lumen for the in situ synthesis papers are much better than that of the lumen loading papers.

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“…Linear and circular birefringence, dichroism and Faraday rotation are some among the magneto-optical properties shown by these rheological fluids which are investigated extensively (Davies and Llewellian 1980;Xu and Ridler 1997;Sutharia and Upadhyaya 1998;Horng et al 1999;Hasmonay and Depeyrot 2000;Bakuiz et al 2000a, b;Deperiot et al 2001;Pereira et al 2001;Wu et al 2001). However, a systematic study and correlation of the optical and magnetic properties shown by these fluids in device point of view has seldom been tried.…”

Section: Introductionmentioning

confidence: 96%

Ferrofluid thin films as optical gaussmeters proposed for field and magnetic moment sensing

et al. 2011

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Ferrofluids belonging to the series, Ni x Fe 1−x Fe 2 O 4 and Zn x Fe 1−x Fe 2 O 4 , were synthesized using cold co-precipitation. Liquid films of these ferrofluids were prepared by encapsulating the ferrofluids in between two optically smooth and ultrasonically cleaned glass plates. Magnetic field induced laser transmission through these ferrofluid films has been investigated. Magnetic field values can be calibrated in terms of output laser power in the low field region in which the variation is linear. This set up can be used as a cheap optical gaussmeter in the low field regime. Using the same set-up, the saturation magnetization of the sample used can also be calculated with a sample that is pre-characterized. Hence both magnetization of the sample, as well as applied magnetic field can be sensed and calculated with a precalibrated sample.

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Magnetic and optical properties of Fe/sub 3/O/sub 4/ nanoparticle ferrofluids prepared by coprecipitation technique

Cited by 71 publications

References 8 publications

Synthesis of iron oxide nanoparticles under oxidizing environment and their stabilization in aqueous and non-aqueous media

Synthesis of iron oxide nanoparticles under oxidizing environment and their stabilization in aqueous and non-aqueous media

Preparation of Magnetic Paper from Kenaf: Lumen Loading and in situ Synthesis Method

Ferrofluid thin films as optical gaussmeters proposed for field and magnetic moment sensing

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