Scientists have developed a novel method to provide energy autonomy to soft robots by harnessing environmental temperature fluctuations that follow a circadian cycle. This breakthrough allows robots to perform repetitive tasks for extended periods without the need for batteries or continuous external power sources. The key lies in a design that converts diurnal and nocturnal thermal variations into mechanical motion, paving the way for applications in environmental monitoring or remote exploration where recharging is impractical.

The system is based on shape memory polymers (SMPs) that can be programmed to change their configuration in response to temperature. By integrating these materials into the structure of a soft robot, researchers enabled the device to cyclically deform and recover its shape with environmental thermal changes. This oscillatory movement is used to drive a mechanism that generates energy or performs an action, such as fluid pumping or gradual displacement. The innovation lies in the ability to "harvest" energy from a natural and predictable cycle, rather than relying on a constant source.

This approach contrasts with traditional power methods for soft robots, which often require tethers, bulky batteries, or complex recharging systems. Relying on circadian temperature oscillations offers a more sustainable and autonomous solution for environments where human intervention is limited or undesirable. The implications of this technology are significant for developing robots that can operate for months or even years in remote locations, such as the deep sea, deserts, or even space, without needing energy maintenance.