The current invention is a novel superparamagnetic site-targeting nanoparticle comprising superparamagnetic nanoparticles encapsulated with a smart polymer. and non-confidential information. A fluid transfer system is operable to transfer fluid between the mother well and daughter well and purify the fluid that is transferred to the daughter well from the mother well. The rigid microfluidic delivery member includes a die and electrical traces that are in electrical communication with the die, wherein the electrical traces terminate at electrical contacts, wherein the electrical traces are disposed on only one plane. The thermal interface material layer is reflowed to establish thermal contact with both the first semiconductor chip and the heat spreader. The foreign material removing member and the seal member are mounted to the ball screw shaft, at each of both the axial ends of the nut, while being overlapped to each other in a state that inner peripheral portions of the foreign material removing member and the seal member contact an outer peripheral surface of the ball screw shaft and the ball rolling groove thereof.