Structure, Thermodynamics and Applications of Ferrofluids
A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Materials".
Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6786
Special Issue Editor
Special Issue Information
Dear Colleagues,
The number of new materials with extreme physical properties is continuously increasing with the development of nanotechnology, such as supra- and paramagnetic ferrofluids, liquid crystals, magnetorheological (MR), and electrorheological (ER) liquids. Among them, a ferrofluid is a liquid that becomes highly magnetized in the presence of a magnetic field. A ferrofluid is a colloidal suspension of single-domain particles dispersed in a carrier liquid and stabilized by a suitable organic surfactant. The particles have radii ranging from approximately 2–10 nm. Single-domain particles are particles that are in a state of uniform magnetization. The magnetic properties of the dispersion, subjected to a constant magnetizing field, are adequately described by the Langevin theory of paramagnetism. Ferrofluids are characterized by a magnetization curve that displays no hysteresis. The measurement of the complex susceptibility of a colloidal suspension of magnetic particles involves the measurement of inductance and resistance of the suspension. The frequency range is determined by the size of the magnetic particles and their subsequent mechanism of relaxation. For magnetic fluids, two relaxation mechanisms can occur, one by rotational Brownian diffusion and the other by Neel relaxation. The dominant magnetization process of a particle will be that which has the shortest relaxation time. As ferrofluids contain a distribution of particle sizes, both mechanisms contribute to the magnetization with an effective relaxation. The conventional method of determining the frequency dependence of the complex susceptibility of a ferrofluid is to insert the fluid into the alternating magnetic field of a coil and observe the changes in its inductance and resistance.
Ferrofluids have many applications ranging from small electronic devices to space crafts to cancer treatments to art. Ferrofluids are found in many common household devices, including hard drives where they are used to seal the interior of the device. When magnetized they form a barrier to dust and dirt that could damage the delicate plates. Ferrofluids can be viewed as a particularly interesting class of dipolar fluids, which have a wide range of potential applications in biomedicine and technology. Separation, immunoassay, drug delivery, magnetic resonance imaging (MRI), and hyperthermia are enhanced by the use of magnetic nanoparticles and ferrofluids. Ferrofluids can have very high thermal conductivities and their heat transfer properties are exploited in devices such as loudspeakers.
This Special Issue will focus on the structural, transport, and thermodynamic properties of ferrofluids, practical usability of ferrofluid materials in industrial, environmental, and medical applications, as well as the dependence of the phase equilibrium properties of these complex fluids on external electric and magnetic fields.
Prof. Dr. Istvan Szalai
Guest Editor
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
Keywords
- Ferrofluids
- Structure of ferrofluids
- Thermodynamics of ferrofluids
- Magnetic nanoparticles
- Nanomagnetism
- Nuclear magnetic resonance
- Magnetic resonance imaging
- Superparamagnetic iron oxide nanoparticles
- Ultrastable colloidal suspensions
- Dynamic magnetic susceptibility
- Brownian dynamics simulations
- Computer simulation
- Phase behavior
- Dipolar fluids
- Magnetic materials
- Magnetic properties
- Biomedical applications
Benefits of Publishing in a Special Issue
- Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
- Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
- Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
- External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
- Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.
Further information on MDPI's Special Issue policies can be found here.
