A magnetocaloric pump for microfluidic applications

IEEE Transactions on Nanobioscience
Lonnie J LoveTommy J Phelps

Abstract

A magnetocaloric pump provides a simple means of pumping fluid using only external thermal and magnetic fields. The principle, which can be traced back to the early work of Rosensweig, is straightforward. Magnetic materials tend to lose their magnetization as the temperature approaches the material's Curie point. Exposing a column of magnetic fluid to a uniform magnetic field coincident with a temperature gradient produces a pressure gradient in the magnetic fluid. As the fluid heats up, it loses its attraction to the magnetic field and is displaced by cooler fluid. The impact of such a phenomenon is obvious: fluid propulsion with no moving mechanical parts. Until recently, limitations in the magnetic and thermal properties of conventional materials severely limited practical operating pressure gradients. However, recent advancements in the design of metal substituted magnetite enable fine control over both the magnetic and thermal properties of magnetic nanoparticles, a key element in colloidal-based magnetic fluids (ferrofluids). This paper begins with a basic description of the process and previous limitations due to material properties. This is followed by a review of existing methods of synthesizing magnetic nanoparticles ...Continue Reading

References

Jun 14, 2000·Analytical Chemistry·C T CulbertsonJ M Ramsey

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Citations

Aug 4, 2007·Extremophiles : Life Under Extreme Conditions·Ji-Won MoonTommy J Phelps
Jun 15, 2010·Journal of Industrial Microbiology & Biotechnology·Ji-Won MoonTommy J Phelps
Oct 26, 2012·The European Physical Journal. E, Soft Matter·R Patel
Jun 12, 2012·Biomicrofluidics·Gang LiJianlong Zhao
Nov 26, 2009·Critical Reviews in Biotechnology·Hassan KorbekandiSajjad Abbasi
May 29, 2007·Journal of Microbiological Methods·Ji-Won MoonTommy J Phelps
Oct 12, 2016·Scientific Reports·V Chaudhary, R V Ramanujan
Dec 24, 2005·Lab on a Chip·Nicole Pamme
Jun 1, 2010·Advanced Materials·Julia LyubinaOliver Gutfleisch
Feb 28, 2006·Nanotechnology·Leidong Mao, Hur Koser
Oct 1, 2012·Microfluidics and Nanofluidics·Taotao ZhuLeidong Mao
Jan 1, 2014·International Scholarly Research Notices·Siavash Iravani
Dec 6, 2012·The Journal of Physical Chemistry Letters·Xuegeng YangKerstin Eckert

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