Micro/nano satellites for future space missions require miniature propulsion systems for precise and accurate control of space craft. the microfabrication technology of mems (microelectromechanical systems) has been successfully employed to batch-fabricate micro-propulsion systems or micro-thrusters capable of producing extremely small thrusts in the range of micronewton to millinewton. combining silicon micromachining technology with a simple low-cost nanotechnology synthesis process vaporizing liquid microthruster (vlm) and catalyst based chemical microthruster have been designed and developed. the thrusters achieve high thrust force and specific impulse with minimum electrical power.