Smart materials are materials that have the ability to change their properties in response to specific external stimuli, such as temperature, humidity, light, or applied stress. One of the most well-known examples of smart materials is shape memory alloy (SMA), which is a type of metallic material that can change its shape in response to changes in temperature.
Click here for original story, A smart elastomer that can self-tune its stiffness and conductivity
Source: Phys.org