Temperatures taken in the realm of the tiny
Some materials can be self-thermometers at the nanoscale
![Nanowire temperature diagram](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/ag_fig1d_mecklenburg150206_0.png?fit=860%2C460&ssl=1)
HEATING UP This diagram shows the range of temperatures along a nano-sized aluminum wire injected with electric current. The marked area in the bottom left is about 310 kelvins (37° Celsius); the marked area top right is about 390 kelvins, hotter than the boiling point of water.
M. Mecklenburg et al/Science