Many kinds of stimuli-responsive polymer gels that respond to a change in their surroundings, such as changes in temperature, pH and the electric field, have been developed. They have attracted much ...

Nature provides much inspiration for the design of materials capable of motion upon exposure to external stimuli, and many examples of such active systems have been created in the laboratory. However, ...

Nudge something away from where it was at rest, and often it will push back. And then overshoot. From atoms to bridges to wheeled luggage, much of the world is in simple harmonic motion Yesterday my ...