Ferrofluid Plug Actuation for Micro Pumping Systems

Abstract:

Ferrofluids are colloidal mixtures which consist of nanosized magnetic particles suspended in a base fluid. The typical magnetic particles could be maghemite, magnetite or cobalt ferrite etc. To keep a ferrofluid suspension in a stable state is possible by an electrical double layer or by adding surfactant. They have many applications on electrical, mechanical and optical systems. Recently, the ability of being manipulated by an external magnetic field made them considerable for microfluidic systems such as micro operations, pumping and mixing. Among them, micro scaled pumping systems have appeared as a critical research area due to its notable potential to be applied on many biological and electronic systems. Moreover, the development of lab on a chip and the micro total analysis systems for biological issues has revealed the necessity of liquid transport for micro quantities. Micropumps with ferrofluid plug actuation mechanisms are considered to have the ability to fulfill this requirement. Therefore, driving the working fluids with ferrofluid plugs in a micro-sized tube or channel has attracted researchers’ interest. In this study, ferrofluid plug actuated micro pumping systems have been reviewed from the available literature based on their design and their maximum generated flow rate.

• Periodical: Key Engineering Materials (Volume 750)
• Pages: 168-172
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.750.168
• Online since: August 2017
• Authors: Serkan Doganay*, Alpaslan Turgut, Levent Cetin
• Keywords: Ferrofluid, Ferrofluid Plug, Magnetic Field, Magnetic Particle, Micro Pump, Microfluidics

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