A microscopic image of multiple electrodes on a sheet of Weyl semimetal, with red and blue arrows depicting the circular movement of the light-induced electrical current by either left- (blue) or right-circularly polarized light (right). (Photo: Zhurun Ji)
A new study found that Weyl semimetals, a class of quantum materials, have bulk quantum states whose electrical properties can be controlled using light. Insights from quantum physics have allowed engineers to incorporate components used in circuit boards, optical fibers, and control systems in new applications ranging from smartphones to advanced microprocessors...
The system helps cool its surroundings by absorbing heat from the air inside the box and transmitting that energy through the Earth’s atmosphere into outer space. Credit: University at Buffalo.
Engineers have designed a new system that can help cool buildings in crowded metropolitan areas without consuming electricity, an important innovation at a time when cities are working to adapt to climate change.
The system consists of a special material – an inexpensive polymer/aluminum film – that’s installed inside a box at the bottom of a specially designed solar “shelter.” The film helps to keep its surroundings cool by absorbing heat from the air inside the box and transmitting that energy through the Earth’s atmosphere into outer space...
Weight-bearing, slope-climbing, and load-carrying capabilities.(A to C) Soft robot can continue to function (one-half of the original speed) after being stepped on by an adult human (59.5 kg), a load about 1 million times its own body weight. Scale bars, 3 cm. A robot climbs a slope (D) of 7.5° with a relative speed of 7 BL/s and a slope (E) of 15.6° with a relative speed of 1 BL/s. Scale bars, 1 cm. (F and G) A robot (0.064 g) carries a peanut (0.406 g), which is six times its own body weight, to show the load-carrying capability. The speed with the peanut on top is about one-six of the original speed without the peanut. Scale bars, 1 cm.
Insect-sized device scurries at the speed of a cockroach and can withstand the weight of a human...
3D bioprinting of collagen to rebuild components of the human heart. Science, 2019; 365 (6452): 482 DOI: 10.1126/science.aav9051
A team of researchers from Carnegie Mellon University has published a paper in Science that details a new technique allowing anyone to 3D bioprint tissue scaffolds out of collagen, the major structural protein in the human body. This first-of-its-kind method brings the field of tissue engineering one step closer to being able to 3D print a full-sized, adult human heart.
The technique, known as Freeform Reversible Embedding of Suspended Hydrogels (FRESH), has allowed the researchers to overcome many challenges associated with existing 3D bioprinting methods, and to achieve unprecedented resolution and fidelity using soft and living materials.
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