Thermally and Electrically Actuated, Heat and Strain Programmable and Sensing,Kilometer-long Micro and Nano, Organic Artificial Muscle Fibers

A method includes drawing a fiber from a set of substances that includes an elastomer having a first thermal expansion coefficient. The set of substances also includes a glassy polymer having a second thermal expansion coefficient that is higher than the first thermal expansion coefficient. The method also includes extending and then releasing, under ambient temperature conditions, the fiber to increase elastic responsiveness of the fiber to thermal actuation.