Two Lehigh University physicists have developed an imaging technique that makes it possible to directly observe light-emitting excitons as they diffuse in a new material that is being explored for its extraordinary electronic properties. Called rubrene, it is one of a new generation of single-crystal organic semiconductors.
As demands grow for portable sensing equipment in the medical equipment and other sectors, instrument designers will demand better power efficiency from the electronic components they specify for their instruments. ON Semiconductor believes its Q32M210 family of mixed-signal microcontrollers will fill a niche for precision measurement and monitoring.
Cheap and readily available, silicon is an attractive choice for integrated photonic circuits. However, silicon suffers high optical loss, so researchers in Singapore have built a new chip that integrates, in addition to a laser, an optical grating that provides gain and steady output wavelengths.
Graphite oxide has been a target for supercapacitor development for up to a decade, but prior to a recent breakthrough at Rice University nobody had been able to turn the material into a functional supercapacitor without adding chemicals. The researchers discovered a new phenomenon of GO, and were able to make the transition simply using heat.
Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound waves so that, when standing in the right spot, a whisper could be heard from across the room. Now, scientists at the University of Pennsylvania have applied the same principle on the nanoscale to reduce emission lifetime.
It stands to reason that the photovoltaic panels on a rooftop are not only converting sunlight to electricity, they are keeping the building cooler by intercepting the solar rays. Until recent research, however, just how much of a cooling benefit they can provide was not known.
Researchers from Tel Aviv University and the Hebrew University have demonstrated how semiconductor nanocrystals can be doped in order to change their electronic properties and be used as conductors, offering new possibilities for the design of small electronic and electro-optical devices.
Researchers at the Stanford School of Engineering have made a nanoelectronic synapse that might drive a new class of microchips that can learn, adapt, and make probability-based decisions in complex environments. The device emulates synaptic plasticity using phase-change material, and makes a leap past two-state transistors by demonstrating the ability to convey at least 100 values from each synapse.
Lawrence Berkeley National Laboratory researchers created tetrapod molecules of semiconductor nanocrystals and watched them break a fundamental principle of photoluminescence known as "Kasha’s rule." The discovery holds promise for multicolor light emission technologies, including LEDs.
Guitar virtuosos have to master all kinds of playing techniques. But how can the intricate process of playing the instrument be captured digitally? A special thin film on the tailpiece has the answer. Functioning as a sensor, it converts the tension on the string into digital control signals.
Australian researchers have invented nanotech solar cells that are thin, flexible, and use one hundredth the materials of conventional solar cells.
In 2009, the American Society of Civil Engineers gave the quality of infrastructure in the U.S. a grade of "D", partly because evaluation and maintenance of structures was not up to par. Civil engineers at MIT, working with physicists in Germany, have invented an inexpensive flexible skin-like fabric with electrical properties that can be attached to concrete structures. The skin would sense cracks as they appear.
A collaboration of physicists working in California and Germany have coaxed the fragile quantum information contained within a single electron in diamond to move into an adjacent single nitrogen nucleus, and then back again using on-chip wiring. This ability is potentially useful to create an atomic-scale memory element in a quantum computer based on diamond.
When semiconductor nanorods are exposed to light, they blink in a seemingly random pattern. By clustering nanorods together, physicists at the Univ. of Pennsylvania have shown that their combined "on" time is increased dramatically providing new insight into this mysterious blinking behavior.
A supercomputer capable of performing more than 8 quadrillion calculations per second is the new number one system in the world, putting Japan back in the top spot for the first time since the Earth Simulator was dethroned in November 2004. The system, called the K Computer, is at the RIKEN Advanced Institute for Computational Science (AICS) in Kobe.
Late last week, the journal Science published IBM’s latest accomplishment in graphene science. Previously, the company’s research arm had built graphene transistors, but for the first time, their team has built a full circuit operating at up to 10 GHz. The wafer, which is the size of a grain of salt, is a frequency mixer that could greatly improve the radio performance of mobile devices like cell phones.
Magnetic studies of ultrathin copper-oxide materials reveal that at low temperatures, the thinnest layers lose their magnetic order. In a surprising discovery that could shed light on superconductivity emergence, Brookhaven Lab observed that these materials become “quantum spin liquid”, a novel state of matter where the orientations of electron spins fluctuate wildly.
Magma Design Automation has launched Silicon One, an initiative intended to bring focus to making silicon profitable for customers by providing differentiated solutions and technologies that address business imperatives facing semiconductor makers.
The Geo-Cosmos is to be unveiled June 11 at the National Museum of Emerging Science and Innovation in Tokyo, Japan. Built by Mitsubishi Electric using 10,362 organic light-emitting diode panels, the giant 6-m globe will project clouds and other meteorological information obtained from satellites.
A Berkeley Lab team has recently demonstrated the first true nanoscale waveguides for next generation on-chip optical communication systems. The key to making their concept work was designing and creating a new quasiparticle called a hybrid plasmon polariton to shepherd light waves.
Researchers from North Carolina State University have developed two new techniques related to common efficiency strategies like prefetching and bandwidth allocation to help maximize the performance of multi-core computer chips by allowing them to retrieve data more efficiently, which boosts chip performance by 10 to 40%.
Scientists at Argonne National Lab and the Univ. of Wisconsin have discovered an electrochemical synthesis method for patterning metallic and semiconducting nanowires. The process, which does not require vacuum, relies on a non-sacrificial template made from ultrananocrystalline diamond.
Recently, scientists have concocted a recipe for a thermoelectric material that might be able to operate off nothing more than the heat of a car's exhaust. In a paper, a team reported on a compound that shows high efficiency at less extreme temperatures.
This week at the Society for Information Display show, Arizona State and Universal Display Corp. are showing off their latest milestone: a full-color, full-motion video display prototype built on a flexible substrate. The device, which is intended for military use, was built using a bond-debond approach pioneered at ASU’s Flexible Display Center along with Universal Display’s proprietary encapsulation technology.
In the push toward ever-smaller and ever-faster data transmission technology, a team of Stanford electrical engineers has produced a nanoscale laser that is much faster and more energy efficient than anything available today.