Mass-Made Microrobots

The provided text details the development of mass-manufactured microscopic robots that are smaller than the limit of human vision. Researchers created a novel class of surface electrochemical actuators made from nanometer-thick platinum, which bend in response to low-voltage electrical signals. These robots integrate standard silicon microelectronics with functional legs, allowing them to walk when triggered by laser pulses. Because the fabrication process is compatible with semiconductor manufacturing, over one million units can be produced on a single four-inch wafer. The resulting machines are remarkably durable, surviving extreme temperatures and chemical environments while remaining small enough to be injected through hypodermic needles. This advancement bridges the gap between complex electronic control and microscopic physical motion, mimicking the scale and speed of biological microorganisms.