Fragments of DNA have been pieced together to make a molecular thermometer that unfolds as things heat up to release fluorescent markers that appear only at a specific temperature. The devices could be used in cell studies or to monitor tiny temperature jumps in micro or even nano-systems. The molecular thermometers are the invention of Alexis Vallée-Bélisle and his colleagues at The University of Montreal, Canada. They can tune them to respond to a temperature change of just 0.05 degrees Celsius or to operate over a 50 degree range as required.
The sub-microscopic thermometer made from DNA