A layer of silicon nanocrystals and erbium ions may help solar cells to extract more energy from the ultraviolet (UV, high-energy) part of the solar spectrum. Experimental physicists from the FOM Foundation, the STW Technology Foundation and the University of Amsterdam published this news in Nature ...
A team of researchers has created a new way of manufacturing microstructured surfaces that have novel three-dimensional textures. These surfaces, made by self-assembly of carbon nanotubes, could exhibit a variety of useful properties—including controllable mechanical stiffness and strength, or the ...
Categorizing and representing huge amounts of data -- we're talking about peta- or even exabytes of information -- synthetically is a challenge of the future. A research paper proposes an efficient procedure to face up to this challenge.
A new record for a trapped field in a superconductor, beating a record that has stood for more than a decade, could herald the arrival of materials in a broad range of fields. Researchers managed to 'trap' a magnetic field with a strength of 17.6 Tesla -- roughly 100 times stronger than the field generated by a typical fridge magnet -- in a high temperature gadolinium barium copper oxide (GdBaCuO) superconductor, beating the previous record by 0.4 Tesla.
Chemists have constructed liquid crystals with optical properties that can be instantly and reversibly controlled by an external magnetic field. The research opens the door to display applications relying on the instantaneous and contactless nature of magnetic manipulation -- such as signage, posters, writing tablets, and billboards. Requiring no electrodes, the liquid crystals have applications in anti-counterfeit technology and optical communication devices for controlling the amplitude, phase, polarization, propagation direction of light.
A new line of genetically modified pigs will host transplanted cells without the risk of rejection, opening the door for future stem cell therapy research. One of the biggest challenges for medical researchers studying the effectiveness of stem cell therapies is that transplants or grafts of cells are often rejected by the hosts.
A team of researchers has developed sperm-inspired microrobots, which consist of a head coated in a thick cobalt-nickel layer and an uncoated tail. When the robot is subjected to an oscillating field of less than five millitesla, it experiences a magnetic torque on its head, which causes its flagellum to oscillate and propel it forward. The researchers are then able to steer the robot by directing the magnetic field lines towards a reference point.
Combining atoms of semiconductor materials into nanowires and structures on top of silicon surfaces shows promise for a new generation of fast, robust electronic and photonic devices. Scientists have recently demonstrated three-dimensional nanowire transistors using this approach that open exciting opportunities for integrating other semiconductors, such as gallium nitride, on silicon substrates.
A technique whereby semiconductors made from graphene and boron nitride can be charge-doped to alter their electronic properties using only visible light has been demonstrated by researchers. Graphene continues to reign as the next potential superstar material for the electronics industry, a slimmer, stronger and much faster electron conductor than silicon.
Chemists have invented a new type of tiny lab-on-a-chip device that could have a diverse range of applications, including to detect toxic gases, fabricate integrated circuits and screen biological molecules. The novel technique developed by the team involves printing a pattern of miniscule droplets of a non-volatile solvent -- an ionic liquid -- onto a gold-coated or glass surface.
Heart cells created from human embryonic stem cells successfully restored damaged heart muscles in monkeys, researchers report. Stem-cell derived heart muscle cells infiltrated into damaged heart tissue, assembled muscle fibers and began to beat in synchrony with macaque heart cells. Scientists are working to reduce the risk of heart rhythm problems and to see if pumping action improves.
A new nano-membrane made out of the 'super material' graphene is extremely light and breathable. Not only can this open the door to a new generation of functional waterproof clothing, but also to ultra-rapid filtration. The new membrane just produced is as thin as is technologically possible.
Scientists reported the first human recipients of laboratory-grown vaginal organs. They have described long-term success in four teenage girls who received vaginal organs that were engineered with their own cells.
Several different methods exist for generating electricity from the mixing of salt water and fresh water, which is also called salinity gradient power (SGP). One method uses concentration cells, in which two semi-cells separated by a porous diaphragm such as filter paper are filled with solutions of ...
A new type of ransomware known simply as Onion, has been discovered by Russian based security firm Kaspersky Lab. To force victims to hand over money, the software encrypts stored data files and then uses Tor (anonymity network) to facilitate transfer of funds anonymously. Thus far, the ransomware appears ...
Climate change is predicted to have major impacts on the many species that call our rocky shorelines home. Indeed, species living in these intertidal habitats, which spend half their day exposed to air and the other half submerged by water, may be subjected to a double whammy as both air and water temperatures rise. Given the reliance of human society on nearshore coastal ecosystems, it is critical that we better understand how climate change will affect them.
Machine learning, in which computers learn new skills by looking for patterns in training data, is the basis of most recent advances in artificial intelligence, from voice-recognition systems to self-parking cars. It's also the technique that autonomous robots typically use to build models of their environments. A new algorithm lets independent agents collectively produce a machine-learning model without aggregating data.
Researchers have unveiled the world's first fully two-dimensional field-effect transistor, using new device architecture that provides high electron mobility even under high voltages and scaled to a monolayer in thickness.
Nanotechnology scientists have developed a way to both transmit and store electricity in a single lightweight copper wire. Sounds like science fiction, but it may become a reality thanks to breakthrough technology. So far electrical cables are used only to transmit electricity. However, nanotechnology scientists have developed a way to both transmit and store electricity in a single lightweight copper wire.
Researchers optically trapped a cloud of gas a billion times colder than air in a very low-pressure vacuum, and found a lower speed limit to diffusion. Assembling the puzzles of quantum materials is, in some ways, like dipping a wire hanger into a vat of soapy water, says one of the researchers. Long before mathematical equations could explain the shapes and angles in the soap foams, mathematicians conjectured that soap films naturally found the geometry that minimized surface area, thus solving the problem of minimal surfaces. They could be created simply by blowing soap bubbles.
The energy efficiency of a new piezoelectric nanogenerator has increased by almost 40 times, one step closer toward the commercialization of flexible energy harvesters that can supply power infinitely to wearable, implantable electronic devices. Nanogenerators are innovative self-powered energy harvesters that convert kinetic energy created from vibrational and mechanical sources into electrical power, removing the need of external circuits or batteries for electronic devices. This innovation is vital in realizing sustainable energy generation in isolated, inaccessible, or indoor environments and even in the human body.
Scientists seeking ways to synchronize the magnetic spins in nanoscale devices to build tiny yet more powerful signal-generating or receiving antennas and other electronics have published a study showing that stacked nanoscale magnetic vortices separated by an extremely thin layer of copper can be driven to operate in unison. These devices could potentially produce a powerful signal that could be put to work in a new generation of cell phones, computers, and other applications.
Engineers have successfully grown -- for the first time -- fully functional human cartilage in vitro from human stem cells derived from bone marrow tissue. Their study demonstrates new ways to better mimic the enormous complexity of tissue development, regeneration, and disease.
One strategy for addressing the world's energy crisis is to stop wasting so much energy when producing and using it, such as in coal-fired power plants or transportation. Nearly two-thirds of energy input is lost as waste heat. Now scientists have discovered a surprising material that is the best in the world at converting waste heat to useful electricity. This outstanding property could be exploited in solid-state thermoelectric devices, with potentially enormous energy savings.
Scientists have created a compound semiconductor of nearly perfect quality with embedded nanostructures containing ordered lines of atoms that can manipulate light energy in the mid-infrared range. More efficient solar cells, less risky and higher resolution biological imaging, and the ability to transmit massive amounts of data at higher speeds are only a few applications that this unique semiconductor will be able to support.