The widespread adoption of thermoelectric devices that can directly convert electricity into thermal energy for cooling and heating has been hindered, in part, by the lack of materials that are both inexpensive and highly efficient at room temperature. Now researchers from the University of Houston and the Massachusetts Institute of Technology have reported the discovery of a new material that works efficiently at room temperature while requiring almost no costly tellurium, a major component of the current state-of-the-art material.
Most magnets are rigid but have made great contributions to society and to modern industry, says Thomas Russell of UMass Amherst. But this award-winning innovator dreamed of more -- what if magnets could be soft and flowable as liquid to conform to a limited space? In Science this week, he and Xubo Liu from Beijing University of Chemical Technology, others at Berkeley National Lab and UC Berkeley, report on a simple way to transform paramagnetic ferrofluids -- plain metal particles in suspension -- into a magnetic state.
Scientists at Berkeley Lab have made a new material that is both liquid and magnetic, opening the door to a new area of science in magnetic soft matter. The new material could lead to a revolutionary class of printable liquid devices for a variety of applications from artificial cells that deliver targeted cancer therapies to flexible liquid robots that can change their shape to adapt to their surroundings.
Researchers at the US Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a graphene device that's thinner than a human hair but has a depth of special traits. It easily switches from a superconducting material that conducts electricity without losing any energy, to an insulator that resists the flow of electric current, and back again to a superconductor -- all with a simple flip of a switch.
Materials scientists uncover source of degradation in sodium batteries.
Imagine powering your devices by walking. With technology recently developed by researchers at the Chinese University of Hong Kong and described in Applied Physics Letters, that possibility might not be far out of reach. An energy harvester is attached to the wearer's knee and can generate 1.6 microwatts of power while the wearer walks without any increase in effort. The energy is enough to power small electronics like health monitoring equipment and GPS devices.
UCLouvain's researchers have discovered a new high performance and safe battery material (LTPS) capable of speeding up charge and discharge to a level never observed so far. Practically, if the first tests are confirmed, this new material could be used in the batteries of the future with better energy storage, faster charge and discharge and higher safety targeting many uses from smartphones, to electric bicycle and cars. These results are published in the prestigious journal Chem from Cell Press.
Scientists have visualized the electronic structure in a microelectronic device for the first time, opening up opportunities for finely tuned high-performance electronic devices.
Carbon materials such as nanotubes, graphene, activated carbon and graphite are in high demand. The research team at Shinshu University set out to create more efficient forms of activated carbon by utilizing the superconducting magnets, thus increasing the volume of pores in the activated carbon by 35%. Many other materials that have negative magnetic susceptibility may also be manufactured using this effective procedure with the superconducting magnets to control for better properties.
Carnegie Mellon University's Assistant Professor of Electrical and Computer Engineering (ECE) Maysam Chamanzar and ECE Ph.D. student Matteo Giuseppe Scopelliti today published research that introduces a novel technique which uses ultrasound to noninvasively take optical images through a turbid medium such as biological tissue to image body's organs. This new method has the potential to eliminate the need for invasive visual exams using endoscopic cameras.