Results 111 to 120 of about 5,171 (162)

Shape-Reconfigurable Ferrofluids

Nano Letters, 2022
Ferrofluids (FFs) can adapt their shape to a magnetic field. However, they cannot maintain their shape when the magnetic field is removed. Here, with a magneto-responsive and reconfigurable interfacial self-assembly (MRRIS) process, we show that FFs can be structured by a magnetic field and maintain their shape, like solids, after removing the magnetic
Sai Zhao, Jun-Yan Zhang, Yuchen Fu, Shipei Zhu, Ho Cheung Shum, Xubo Liu, Zhaoyu Wang, Ruquan Ye, Ben Zhong Tang, Thomas P. Russell, Yu Chai   +10 more
openaire   +3 more sources

Structure of ferrofluid dynamics

Physical Review E, 2001
The complete magnetodissipative structure of ferrofluid dynamics is derived from general principles, without reference to the angular momentum of the ferromagnetic grains. The results are independent of most microscopic details, and easily interpret two previous experiments.
Müller, H., Liu, M.
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A Shapeshifting Ferrofluidic Robot

Soft Robotics, 2021
To create a miniature shapeshifting robot capable of controlled movement, subdivision, regeneration, passage through small channels, engulfment of particles, object manipulation, and flow manipulation, a droplet of magnetically responsive ferrofluid is used.
Reza, Ahmed, Mahdi, Ilami, Joseph, Bant, Borhan, Beigzadeh, Hamid, Marvi   +4 more
openaire   +2 more sources

Capillary viscosimetry on ferrofluids

Journal of Physics: Condensed Matter, 2008
Experiments performed for different ferrofluids under shear flow have shown that an increase of the magnetic field strength applied to the sample yields an increase of the fluid's viscosity, the so called magnetoviscous effect. It has been shown that the magnitude of the effect is strongly related to the modification of the microstructure of ...
L M, Pop, S, Odenbach
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Ultrasound Attenuation in Ferrofluids

Physical Review Letters, 2008
The absorption of acoustic energy by internal degrees of freedom of short chains is proposed as a new viable mechanism of ultrasound attenuation in ferrofluids. It is demonstrated that even though the volume fraction of the chains may be quite small, such an effect may reach the order of magnitude of viscous damping.
Mark, Shliomis, Michael, Mond, Konstantin, Morozov   +2 more
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Anomalous diffusion in ferrofluids

Physical Review E, 2009
By dynamic light scattering we have studied suspensions of ferrimagnetic maghemite (gamma-Fe2O3) nanoparticles in n -decane with attractive interparticle interaction. The measurements in the suspensions of different concentrations ranging from 0.21 to 25.8 wt % have been compared in zero external field and in the magnetic field of 270 mT.
Alenka, Mertelj, Luka, Cmok, Martin, Copic   +2 more
openaire   +2 more sources

An ultrasonic characterization of ferrofluid

Ultrasonics, 2009
Nanoparticles of Cr(2)O(3) are prepared through hydrothermal synthesis process using CrO(3)/PVA in aqueous solution using sucrose as a reducing agent. The calcination temperature is taken 300 and 350 degrees C. XRD and SEM of the powdered Cr(2)O(3) particles are done for the characterization. The average particle size is found 30-80 nm.
D K, Singh, D K, Pandey, R R, Yadav
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Viscoelastic properties of ferrofluids

Physical Review E, 2010
The paper deals with theoretical study of non linear viscoelastic phenomena in ferrofluids placed in magnetic field. Our attention is focused on the study of nonstationary flow and Maxwell-like relaxation of the macroscopical viscous stress after alternation of the shear rate. We propose that these phenomena can be explained by finite rate of evolution
Chirikov, D N, Fedotov, S P; id_orcid 0000-0003-2722-4330, Iskakova, L Yu, Zubarev, A Yu   +3 more
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Biomedical Engineered Ferrofluids

MRS Proceedings, 2007
AbstractThe characteristic of combining liquid behavior with and magnetic properties makes ferrofluids unique and it provides them a variety of applications, in particular in the medial field. For medical application ferrofluids are required to be stable at neutral pH and against high salt concentration.
Koser, Hur, Sarikaya, Mehmet, Tamerler-Behar, Candan, Gungormus, MUSTAFA, Mao, Leidong, Fischer, Birgit   +5 more
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Adhesion phenomena in ferrofluids

Physical Review E, 2004
One efficient way of determining the bond strength of adhesives is to measure the force or the work required to separate two surfaces bonded by a thin adhesive film. We consider the case in which the thin film is not a conventional adhesive material but a high viscosity ferrofluid confined between two narrowly spaced parallel flat plates subjected to ...
José A, Miranda, Rafael M, Oliveira, David P, Jackson   +2 more
openaire   +2 more sources