Abstract
We study the phase segregation in magnetite ferrofluids under the influence of an external magnetic field. A phase with lower nanoparticle density and corresponding higher optical transmission is formed in the bottom of a glass cell in the presence of only a very modest magnetic field gradient (smaller than 25 T/m). The flux density in our magnetic configuration is simulated using finite element methods. Upon switching off the external magnetic field, the low-density phase develops into a ‘bubble’-like feature. The kinetics of this ‘bubble’ in the absence and presence of a magnetic field are described and analyzed in terms of a simple model, which takes into account buoyancy and drag forces
Original language | Undefined |
---|---|
Pages (from-to) | 261-265 |
Number of pages | 5 |
Journal | Journal of colloid and interface science |
Volume | 327 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2008 |
Keywords
- IR-75193
- METIS-249960