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Theoretical Aspects of Nanoparticle Electric Propulsion

The nanoparticle field extraction thruster (nanoFET), using charged nanoparticles to generate propulsive thrust, is currently under development at the University of Michigan. This paper discusses the theoretical aspects of nanoFET operation, including particle charging, transport, and extraction from the liquid reservoir. Considerations regarding the liquid, such as Taylor cone formation and colloid generation as well as space charge limits associated with a viscous medium, are also discussed. The paper concludes with a discussion of the relationship between particle scaling and thruster performance.