[Images above] Credit: NIST
A team led by researchers from the SLAC National Accelerator Laboratory has demonstrated for the first time that energy transfer in 2-D materials excited with light is very fast and extremely efficient. The researchers looked at a sample made of two layers of molybdenum diselenide.
A research team has studied the fluorescence of carbon nanotubes made from graphene sheets a single atom thick. The wavelength of infrared emission from the CNTs could be tuned depending on which elements were attached to organic molecules bonded to CNTs’ outer wall, and at which position.
The semiconductor industry struggles to contain overheating in devices. Now researchers from the University of York and Roma Tre University believe the solution lies in composite materials built from monolayers of graphene and transition metal dichalcogenide.
Researchers at the Indian Institute of Science have created a novel hybrid of graphene and quantum dots, a breakthrough that may inspire highly efficient and controllable next-generation displays and LEDs.
Los Alamos scientists have shown that they can successfully amplify light using electrically excited films of the chemically synthesized semiconductor nanocrystals known as quantum dots.
Researchers at Ludwig-Maximilians-Universität München have precisely tuned the optical and photocatalytic properties of so-called carbon dots by controlling the positions of nitrogen atoms introduced into their structure.
Researchers from the University of Minnesota have found yet another remarkable use for the wonder material graphene—tiny electronic “tweezers” that can grab biomolecules floating in water with incredible efficiency.
The discovery of nanoscale changes deep inside hybrid perovskites could shed light on developing low-cost, high-efficiency solar cells. Using X-ray beams and lasers, a team of researchers discovered how the movement of ions in hybrid perovskites causes certain regions within the material to become better solar cells than other parts.
Researchers at The University of Tokyo have developed a semi-transparent solar cell that uses the organic-inorganic hybrid material perovskite to generate electricity. This material efficiently absorbs blue light, while nanocubes of metallic silver improve the capture of red light, letting visually important green light through.
Scientists from State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, and Materials Genome Institute Shanghai University reviewed some representative activity descriptors to screen high-activity catalysts in future high-throughput calculations and experiments.
A transfer technique based on thin sacrificial layers of boron nitride could allow high-performance gallium nitride gas sensors to be grown on sapphire substrates and then transferred to metallic or flexible polymer support materials. The technique could facilitate the production of low-cost wearable, mobile, and disposable sensing devices.
MIT researchers have developed a new system that could potentially be used for converting power plant emissions of carbon dioxide into useful fuels for cars, trucks, and planes, as well as into chemical feedstocks for a wide variety of products.
To date, most empirical evidence on climate change impacts have focused on the agricultural sector. Little is known about the effects on, say, manufacturing in, say, China, which is in many ways “the factory of the world.”
Scientists explore new methods to capitalize on Nature’s light-harvesting secrets. Their new study outlines the design of a synthetic system for energy gathering, conversion and transport that may point the way to innovations in solar energy, materials science, nanotechnology and photonics.
A team of University of Illinois bioengineers has taken a new look at an old tool to help characterize a class of materials called metal organic frameworks (MOFs). MOFs are used to detect, purify, and store gases, and could help solve some of the world’s most challenging energy, environmental and pharmaceutical challenges.
Uranium can perform reactions that previously no one thought possible, which could transform the way industry makes bulk chemicals, polymers, and the precursors to new drugs and plastics, according to new findings from the University of Manchester.
When hit by a powerful shock wave, materials can change their shape—a property known as plasticity—yet keep their lattice-like atomic structure. Now scientists have used an X-ray laser to see how a material’s atomic structure deforms when shocked by extreme pressures.
Physicists have found a way to use waste heat energy from electronics: They apply the heat to generate magnetic signals known as ‘spin currents’. In a new study, they tested which materials can generate this spin current most effectively from heat by determining the strength of the spin current for various combinations of thin films.
When bonding two pieces of metal, either the metals must melt a bit where they meet or some molten metal must be introduced between the pieces. A solid bond then forms when the metal solidifies again. But researchers at MIT have found that in some situations, melting can actually inhibit metal bonding rather than promote it.
Scientists have developed a robust liquid-repellent structure and the fabrication of porous surfaces by an innovative microfluidic-droplet-based technique. Materials such as textiles, metals, and glasses covered by a layer of this robust porous surface can then become liquid-repellent.
Fraunhofer researchers have created a new type of glass break alarm system that recognizes any attempt to manipulate the window. It registers temperature changes in real time as well as vibrations caused by external interference with the glass, leaving burglars with no chance.
Using non-destructive imaging methods, a team of scientists at KIT has obtained 3-D insights into the interior of crystals. They determine important data about line-shaped defects that largely influence the deformation behavior of crystals. These so-called dislocations impede the production of computer chips.
The layered superconducting material is characterized by a crystal structure in which a SnAs layer (wherein Sn and As are 2-D bonded to develop superconductivity) and a Na layer (the spacer layer) are alternately laminated.