Scientists will, for example, be able to be much more specific about what can be removed from a solution, like a blood sample. The proteins can be engineered to pull a specific molecule from the blood and hang onto it until the blood has been washed away. Computing is another area where these switches can be used. Computers operate on a binary system of on and off states. The diminutive size of proteins and the molecules involved will open up avenues into advanced concepts like 'lab on a chip' technology.
Scientists use changes in temperature, acidity and light to trigger the smart polymers.