Heat cloak coating could hide people from thermal cameras 

The ultrathin coating is made from samarium nickel oxide, a tunable material that has some unique properties in certain temperature ranges. A general rule of physics is that objects grow brighter as their temperature increases. This allows infrared or thermal cameras to detect people and vehicles based on the heat they emit. But the new coating does not exhibit this regular linear relationship with heat and light and therefore has potential for camouflage devices or even clothing to enhance personal privacy.  

Thermal imaging detects mental strain on pilots’ faces

Graphene-based sensor has potential for high-resolution thermal imaging

"This is the first time temperature and thermal light emission have been decoupled in a solid object,” said Mikhail Kats, professor of electrical and computer engineering at the University of Wisconsin-Madison. 

“We built a coating that 'breaks' the relationship between temperature and thermal radiation in a very particular way. Essentially, there is a temperature range within which the power of the thermal radiation emitted by our coating stays the same."