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New Device Hides, on Cue, from Infrared Cameras

Published: November 26, 2012.
By Harvard University

Cambridge, Mass. - November 26, 2012 - Now you see it, now you don't. A new device invented at the Harvard School of Engineering and Applied Sciences (SEAS) can absorb 99.75% of infrared light that shines on it. When activated, it appears black to infrared cameras. Composed of just a 180-nanometer-thick layer of vanadium dioxide (VO2) on top of a sheet of sapphire, the device reacts to temperature changes by reflecting dramatically more or less infrared light.

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More news from Harvard University

Fighting Unfairness
Just about every parent is familiar with the signs: the crying, the stomping feet and pouting lips, all of which are usually followed by a collapse to the floor and a wailed insistence that, "It's not fair!"
Inside the Cell, an Ocean of Buffeting Waves
Cambridge, Mass. – August 14, 2014 – Conventional wisdom holds that the cytoplasm of mammalian cells is a viscous fluid, with organelles and proteins suspended within it, jiggling against one another and drifting at random. However, a new biophysical study led by researchers at Harvard University challenges this model and reveals that those drifting objects are subject to a very different type of environment.
A Self-organizing Thousand-robot Swarm
Cambridge, Mass. – August 14, 2014 – The first thousand-robot flash mob has assembled at Harvard University. "Form a sea star shape," directs a computer scientist, sending the command to 1,024 little bots simultaneously via an infrared light. The robots begin to blink at one another and then gradually arrange themselves into a five-pointed star. "Now form the letter K."
HSCI Researchers Identify Another Potential ALS Treatment Avenue
Cambridge, MA, Aug 6 - A series of studies begun by Harvard Stem Cell Institute (HSCI) scientists eight years ago has lead to a report published today that may be a major step forward in the quest to develop real treatments for amyotrophic lateral sclerosis, ALS, or Lou Gehrig's disease.
Making Sense of Scents
For many animals, making sense of the clutter of sensory stimuli is often a matter or literal life or death. Exactly how animals separate objects of interest, such as food sources or the scent of predators, from background information, however, remains largely unknown. Even the extent to which animals can make such distinctions, and how differences between scents might affect the process were largely a mystery – until now.
When Cooperation Counts
Everybody knows the shortest distance between two points is a straight line, and now Harvard researchers have evidence that sperm have been taking the familiar axiom to heart. Though competition among individual sperm is usually thought to be intense, with each racing for the chance to fertilize the egg, Harvard scientists say in some species, sperm form cooperative groups that allow them to take a straighter path to potential fertilization.
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Applied Physics as Art
By Harvard University

NASA Develops Super-black Material That Absorbs Light
'Oscar Madison' Approach to Solar Cells May Outshine 'Felix Unger' Design
By American Institute of Physics
In the race to enhance the efficiency of solar cells, spending the time and effort to get tiny nanowires to line up neatly on the top of ordinary silicon …
Coatings with Nanoparticles That Interact with Sunlight And Eliminate Contaminants Are Developed
By Elhuyar Fundazioa
Researchers of the UPNA-Public University of Navarre have developed a type of coating for construction materials. It is based on nanoparticles that interact with sunlight and trigger a chemical …

Solar Concentrator Increases Collection with Less Loss
By Penn State

A Giant Leap to Commercialization of Polymer Solar Cell
By Ulsan National Institute of Science and Technology(UNIST)
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