M-bots are small robots that can be actuated and localized inside the human body to aid in illness detection and treatment. Nanomaterials provide a link between robotics and nanomedicine through applications that allow for the on-demand execution of tasks via remote control via a programmable energy input. Microrobots are typically less than one millimeter in size, whereas nanorobots and M-bots are less than one meter in size.Micro- and nanoscale robots can be controlled by external fields for steering and propulsion. Using the GLAD method, nanoscale helical swimmer with a diameter of 200–300 nm and a length of only 1–2 m. capable of reaching speeds of up to 40 m s 1 when precisely controlled by a magnetic field. Ultrasonic field-related actuation may be used for a variety of m-bots, including metallic nanowire and tubular microagent propulsion, microbead rotation, and nanoparticle patterning.