Thermal 2 (IMAGE) Rice University Caption A scanning electron microscope image shows submicron-scale cavities patterned into films of aligned carbon nanotubes developed at Rice University. The cavities trap thermal photons and narrow their bandwidth, turning them into light that can then be recycled as electricity. Credit Naik Lab/Rice University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.