A group at Saudi Arabia's King Abdulla University of Science and Technology have developed a new carbon-nanotube-based material that absorbs 98 to 99 percent of light between 400 and 1,400nm, from all angles, making even blacker than Rice University's 2008 none-more-black, Boston and Duke's 2008 none-more-black and Leiden University's 2009 none-more-black. That's pretty fucking black.
Engineering broadband light absorbers is crucial to many applications, including energy-harvesting devices and optical interconnects. The performances of an ideal absorber are that of a black body, a dark material that absorbs radiation at all angles and polarizations. Despite advances in micrometre-thick films, the absorbers available to date are still far from an ideal black body. Here, we describe a disordered nanostructured material that shows an almost ideal black-body absorption of 98–99% between 400 and 1,400 nm that is insensitive to the angle and polarization of the incident light. The material comprises nanoparticles composed of a nanorod with a nanosphere of 30 nm diameter attached. When diluted into liquids, a small concentration of nanoparticles absorbs on average 26% more than carbon nanotubes, the darkest material available to date. By pumping a dye optical amplifier with nanosecond pulses of ∼100 mW power, we harness the structural darkness of the material and create a new type of light source, which generates monochromatic emission (∼5 nm wide) without the need for any resonance. This is achieved through the dynamics of light condensation in which all absorbed electromagnetic energy spontaneously generates single-colour energy pulses.
Researchers create blackest material ever made
Writing for the New York Times, Heather Murphy has a fascinating story about the unexpected results of a bone marrow transplant. When a patient receives a bone marrow transplant, the patient’s own cells are destroyed and replaced with cells from a donor. Thereafter, the patient is a “chimera,” with two sets of DNA. It’s believed […]
I’m not an engineer, but I can’t stop watching this hypnotic and oddly satisfying video of tying rebar.
The Australian Acoustic Observatory project, described by its creators as a kind of “Google Street View of sound,” is a new acoustic sensor network of hundreds of microphones and digital audio recorders distributed across multiple remote ecosystems on the continent. The solar-powered system will record animal and natural sounds continuously for 5 years. According to […]
There’s no shortage of wireless chargers out there. So when one scores a Best of Innovation Award at the Consumer Electronics Show, we take notice. And, those industry nods mean good news for just about anybody with a smartphone, because the HyperCharger X Wireless Charger means there’s no excuse for losing power when you’re out […]
Once you’ve cut steak or poultry with some actual quality knives, it’s really tough to go back to those budget blades you bought at the department store a couple of decades ago. Consider that a fair warning about this 5-Piece Professional Damascus Chef’s Kitchen Set. The holiday discount makes it easy to buy for a […]
Concerned about your eyesight? You probably should be. And we’re not just talking about seniors here. Young or old, we’re all at risk of coming down with vision issues Most of us might get a vision test only once every couple of years or so when we get a new pair of glasses – if […]