Using a material found in Silly Putty and surgical tubing, a group of researchers at the Univ. of California, Riverside Bourns College of Engineering have developed a new way to make lithium-ion batteries that will last three times longer between charges compared to the current industry standard. The innovation involves the development of silicon dioxide nanotube anodes.
Scientists at NASA Langley Research Center have developed a new material technology that alters a surface’s topography and chemistry to promote or mitigate adhesion. LaRC is holding a workshop and meeting on May 22 that explains how these newly available materials work to enhance or remove adhesion. Manufacturers and developers are welcome to attend.
Are you an adhesives or coatings manufacturer? Do you need to adhesively join parts? Or, do you need durable non-stick coatings? Then, make plans to attend this meeting! Learn about new advanced materials and processing methods to either enhance adhesion or to create non-stick surfaces.
New analysis of ancient Jian wares reveals the distinctive pottery contains an unexpected and highly unusual form of iron oxide. This rare compound, called epsilon-phase iron oxide, was only recently discovered and characterized by scientists and so far has been extremely difficult to create with modern techniques.
Vanadium dioxide is called a "wacky oxide" because it transitions between a conducting metal and an insulating semiconductor and with the addition of heat or electrical current. A device created by Penn State engineers uses a thin film of vanadium oxide on a titanium dioxide substrate to create an oscillating switch that could form the basis of a computational device that uses a fraction of the energy necessary for today’s computers.
A simple new technique to form interlocking beads of water in ambient conditions could prove valuable for applications in biological sensing, membrane research and harvesting water from fog. Researchers have developed a method to create air-stable water droplet networks known as droplet interface bilayers. These interconnected water droplets have many roles in biological research because their interfaces simulate cell membranes.
In response to persistent haze and concerns about its health effects, scientists in Hong Kong have developed a simple face mask which can block out suspended particles. The nanofiber technology can filter ultra-fine pollutants that have yet been picked up by air quality monitors. These particles can measure 1 micrometer or less.
Researchers in Australia have created a micrometer thin film with record-breaking optical nonlinearity suitable for high-performance integrated photonic devices. To create the thin film the researchers spin coated graphene oxide solution to a glass surface. Using a laser as a pen they created microstructures on the graphene oxide film to tune the nonlinearity of the material.
A research collaboration has combined several experimental and computational methods to measure, for the first time, the energy needed to change the magnetic anisotropy of a single cobalt atom. Their methodology included the use of inelastic electron tunneling spectroscopy to determine a cobalt atom’s “stubbornness”, or preference toward specific magnetic direction.
Looking at a smooth sheet of plastic in one Univ. of Illinois laboratory, no one would guess that an impact had recently blasted a hole through it. Illinois researchers have developed materials that not only heal, but regenerate. Until now, self-repairing materials could only bond tiny microscopic cracks. The new regenerating materials fill in large cracks and holes by regrowing material.
Research in Australia may help in the fight against terrorism with the creation of a sensor that can detect tiny quantities of explosives with the use of light and special glass fibers. The researchers have created a new optical fiber sensor which can detect explosives in concentrations as low as 6.3 ppm (parts per million). It requires an analysis time of only a few minutes.
Based on recent experiments and computer simulations, scientists at the Max Planck Institute for Polymer Research and the National Univ. of Singapore have attested that the thermal conductivity of graphene diverges with the size of the samples. This discovery challenges the fundamental laws of heat conduction for extended materials.
First proposed for memory in the 1970s, phase-change materials exhibit two metastable states which can store data when placed between two electrically conducting electrodes. IBM researchers in Zurich have recently used them as part of Project Theseus to develop a PCI-e card that melds flash memory with phase-change memory. The major improvement in speed interests IBM for Big Data applications.
While flexible gadgets such as “electronic skin” and roll-up touch screens are moving ever closer to reality, their would-be power sources are either too wimpy or too stiff. But that’s changing fast. Scientists have developed a new device that’s far thinner than paper, can flex and bend, and store enough energy to provide critical back-up power for portable electronics.
An experiment sponsored for students by the European Space Agency has recently shown that carbon nanomaterials are built differently under conditions of hypergravity. They found that there was a distinct change in nanostructures that were built at 1g , 6g and 15g. Both surface growth and volume growth were observed at the higher gravity levels.
A new, absorbable material could be of assistance in future oil spill accidents. A chemically modified nanocellulose sponge, the light material developed at a research laboratory in Europe absorbs the oil spill, remains floating on the surface and can then be recovered. The absorbent can be produced in an environmentally friendly manner from recycled paper, wood or agricultural by-products.
Sandia National Laboratories is working to fill gaps in the fundamental understanding of materials science through an ambitious long-term, multidisciplinary project called Predicting Performance Margins (PPM). Since 2010, PPM has been helping to identify how material variability affects performance margins for engineering components. The goal, says Sandia experts, is a science-based foundation for materials design and analysis.
A specially formed material that can provide custom broadband absorption in the infrared can be identified and manufactured using "genetic algorithms," according to Penn State Univ. engineers, who say these metamaterials can shield objects from view by infrared sensors, protect instruments and be manufactured to cover a variety of wavelengths.
Northwestern Univ. researchers are the first to develop a new solar cell with good efficiency that uses tin instead of lead perovskite as the harvester of light. The low-cost, environmentally friendly solar cell can be made easily using "bench" chemistry, with no fancy equipment or hazardous materials.
Current approaches to flexible electronics, in which very thin semiconductor materials are applied to a thin, flexible substrate in wavy patterns and then applied to a deformable surface such as skin or fabric, are still built around hard composite materials that limit their elasticity. Researchers in California have made several discoveries, however, that could lead to electronics that are "molecularly stretchable."
For the first time, scientists have a clearer understanding of how to control the appearance of a superconducting phase in a material, adding crucial fundamental knowledge and perhaps setting the stage for advances in the field of superconductivity. The paper focuses on a calcium-iron-arsenide single crystal, which has structural, thermodynamic and transport properties that can be varied through carefully controlled synthesis.
Super-resolution microscopy has allowed optical imaging of objects with dimensions smaller than the diffraction limit. Researchers studying a type of material called supramolecular polymers have used this type of imaging to develop a new technique that allows them study molecular self-assembly at an unprecedented level of detail.
Scientists studying graphene’s properties are using a new mathematical framework to make extremely accurate characterizations of the 2-D material’s shape. The framework, called discrete differential geometry, is the geometry of 2-D interlaced structures called meshes. When the nodes of the structure correspond with atomic positions, this geometry provides direct information about chemistry and electrical properties.
The icing on the cake for semiconductor nanocrystals that provide a non-damped optoelectronic effect may exist as a layer of tin that segregates near the surface. One method of altering the electrical properties of a semiconductor is by introducing impurities called dopants. A team of researchers has demonstrated that equally important as the amount of dopant is how the dopant is distributed on the surface and throughout the material.
Scientists at Battelle have developed a tiny bead that not only detects corrosion but delivers a payload to help heal the microscopic cracks that rust creates. Called the Battelle Smart Corrosion Detector, the beads look like a fine, whitish powder that can be mixed with coatings used to protect pipelines and other critical infrastructure subject to corrosion. Self-activating, they release a proprietary chemical that fills cracks.