The application discloses a double-cone
DNA chain-shaped magnetic micro-
robot structure and a driving method. The micro-
robot comprises a chain-shaped main body extending along a central axis, the chain-shaped main body is composed of two spiral main chains and a transverse connection sequence, the transverse connection sequence connects the two spiral main chains into
a DNA chain-shaped structure, and an envelope circumscribing the micro-
robot main body structure is double-cone-shaped. A magnetic functional layer and a biocompatible layer are sputtered on the outer surface of the micro-robot in sequence. The magnetic functional layer is magnetized to form a fixed
magnetization direction with a preset misalignment angle with the central axis, so that the micro-robot can realize spiral propulsion under the action of an externally applied uniform
rotating magnetic field. The propulsion direction can be switched by changing the rotating axis angle of the
rotating magnetic field, so that the
tail part can be used as the head part for propulsion in the return process, and the whole turning operation is avoided. The structure takes into account the drag reduction and
attitude stability, and is suitable for micro-fluidic control and biomedical scenes.