Abstract
An influence of polydispersity of ferrofluids on structure of internal chain-like aggregates is studied theoretically. For maximal simplification of analysis we consider a bidisperse model of ferrofluid consisting of relatively big and small particles. In accordance with the composition of many real ferrofluids, we suppose that the energy of magnetic interaction between big particles strongly exceeds thermal energy kT of the system; the energy of interaction between big and small particles is about kT; between two small particles it is significantly smaller than kT. This gives us ground to consider the model of chains, consisting of only big particles, surrounded by the gas of small ones. Both magnetic and steric interactions of the chains with this gas are taken into account. The analysis shows that the magnetic interaction decreases the length of the chains, whereas steric interaction increases it. The final influence of the gas of small particles on the chain is a result of competition of these interactions. Our estimates show that under the increase of hydrodynamical volume concentration of the small particles from zero till 30% the chains can vary several-fold in mean size.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica A: Statistical Mechanics and its Applications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
