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New material may help us build Predator-style thermal vision specs | Films of IR-sensitive material only tens of nanometers thick are tough to make.
Films of IR-sensitive material only tens of nanometers thick are tough to make.
Operating at room temperature caused a lot of random atomic motion in the pyroelectric material, which introduced electrical noise that made it difficult to detect faint infrared signals. When the team was experimenting with growing different films in their previous studies, they noticed that there was a material that easily came off the substrate, yet retained an atomically smooth surface: PMN-PT, or lead magnesium niobate-lead titanate. Tests with ever smaller changes in temperature indicated that it outperformed state-of-the art night vision systems and was sensitive to radiation across the entire infrared spectrum.
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