A team including scientists from Spain and from IBM Research in Switzerland have published work which describes an extremely simple method to obtain high quality nanographenes from easily available organic compounds. This method is based on the reactivity of a group of molecules named arynes, which can act as "molecular glue" to paste graphene fragments together.
Scientists have designed a new self-assembling nanoparticle that targets tumors, to help doctors diagnose cancer earlier. The new nanoparticle, developed by researchers in the U.K., boosts the effectiveness of magnetic resonance imaging scanning by specifically seeking out receptors that are found in cancerous cells.
Scientists in Texas have created a unique sensor that amplifies the optical signature of molecules by about 100 billion times. The new imaging method uses a form of Raman spectroscopy in combination with an intricate but mass reproducible optical amplifier. Newly published tests found the device could accurately identify the composition and structure of individual molecules containing fewer than 20 atoms.
New York state is teaming with General Electric Co. and other companies on a $500 million initiative to spur high-tech manufacturing of miniature electronics, Gov. Andrew Cuomo and GE CEO Jeffrey Immelt announced Tuesday. The state will invest $135 million for the collaborative program, which will be based out of the SUNY College of Nanoscale Science and Engineering in Albany.
The doubling of transistors on a microprocessor occurs roughly every two years, and is the outcome of what is called Moore’s Law. In a bid to continue this trend of decreasing transistor size and increasing computation and energy efficiency, chip-maker Intel has partnered with Lawrence Berkeley National Laboratory to design an entirely new kind of photoresist, one that combines the best features of two existing types of resist.
Prothrombin is an inactive precursor for thrombin, a key blood-clotting protein, and is essential for life because of its ability to coagulate blood. Using x-ray crystallography, researchers have published the first image of this important protein. By removing disordered sections of the protein’s structure, scientists have revealed its underlying molecular mechanism for the first time.
A 3-D porous nanostructure would have a balance of strength, toughness and ability to transfer heat that could benefit, nanoelectronics, gas storage and composite materials that perform multiple functions, according to engineers at Rice Univ. The researchers made this prediction by using computer simulations to create a series of 3-D prototypes with boron nitride, a chemical compound made of boron and nitrogen atoms.
Together with teams from Finland and Japan, physicists from the Univ. of Basel in Switzerland were able to place 20 single bromine atoms on a fully insulated surface at room temperature to form the smallest “Swiss cross” ever created. The effort is a breakthrough because the fabrication of artificial structures on an insulator at room temperature is difficult. It is largest number of atomic manipulations ever achieved at room temperature.
Lithium-ion batteries could benefit from a theoretical model created at Rice Univ. and Lawrence Livermore National Laboratory that predicts how carbon components will perform as electrodes. The model is based on intrinsic electronic characteristics of materials used as battery anodes. These include the material’s quantum capacitance and the material’s absolute Fermi level.
The discovery of buckyballs helped usher in the nanotechnology era. Now, researchers from Brown Univ. and colleagues from China have shown that boron, carbon’s neighbor on the periodic table, can form a cage-like molecule similar to the buckyball. Until now, such a boron structure had only been a theoretical speculation.
Marilyn Minus, a materials expert and assistant professor at Northeastern Univ., is exploring directed self-assembly methods using carbon nanotubes and polymer solutions. So far, she’s used the approach to develop a polymer composite material that is stronger than Kevlar yet much lighter and less expensive. Minus is now expanding this work to incorporate more polymer classes: flame retardant materials and biological molecules.
Rutgers Univ. researchers have developed a technology that could overcome a major cost barrier to make clean-burning hydrogen fuel. The new catalyst is based on carbon nanotubes and may rival cost-prohibitive platinum for reactions that split water into hydrogen and oxygen.
In the movie “Terminator 2,” the shape-shifting T-1000 robot morphs into a liquid state to squeeze through tight spaces or to repair itself when harmed. Now a phase-changing material built from wax and foam, and capable of switching between hard and soft states, could allow even low-cost robots to perform the same feat.
The addition of elements to the surface of graphene can modify the material’s physical and chemical properties, potentially extending the range of possible applications. Recently performed theoretical calculations at RIKEN in Japan show that the addition of oxygen to graphene on copper substrates results in enhanced functionalization. The resulting structure, known as an enolate, make support applications that require catalytic response.
Perovskites continue to entice materials scientists with their mix of conductivity, ferroelectricity, ferromagnetism, and catalytic activity. In recent years, scientists realized that they could vastly improve the properties of perovskites by assembling them into thin films, but nobody knew the reason why. But studying the chemistry layer-by-layer, experts working with x-ray beamline at Argonne National Laboratory are getting close.
The editors of R&D Magazine have announced the winners of the 52nd annual R&D 100 Awards, an international competition that recognizes the 100 most technologically significant products introduced into the marketplace over the past year. The R&D 100 Awards recognize excellence across a wide range of industries...
Scientists at Stanford Univ. and the Dept. of Energy (DOE)’s SLAC National Accelerator Laboratory have found a way to estimate uncertainties in computer calculations that are widely used to speed the search for new materials for industry, electronics, energy, drug design and a host of other applications. The technique, reported in Science, should quickly be adopted in studies that produce some 30,000 scientific papers per year.
Introducing R&D Magazine's 2014 R&D 100 Award winners. The 2014 R&D 100 Award Winners are listed below in alphabetical order by the name of the primary developer company.
A research group based in Japan has developed a new methodology that can easily and precisely control the timing, structure, and functions in the self-assembly of pi-conjugated molecules, which are an important enabling building block in the field of organic electronics. One of the key steps is keeping these molecules in a liquid form at room temperature.
First developed five years ago at Rice Univ., silicon oxide memories are a type of two-terminal, “resistive random-access memory” (RRAM) technology that beats flash memory’s data density by a factor of 50. At Rice, the laboratory of chemist and 2013 R&D Magazine Scientist of the Year James Tour has recently developed a new version of RRAM that Tour believes outperforms more than a dozen competing versions.
A team in the U.K. has found that by sandwiching a 7-nm thick layer of a phase change material between two layers of a transparent electrode they could use a tiny current to “draw” images within the sandwich “stack”. The discovery could make it possible to create pixels just a few hundred nanometers across and pave the way for extremely high-resolution and low-energy thin, flexible displays.
Too cool and faint, many objects in the universe are impossible to detect with visible light. Now a Northwestern Univ. team has refined a new technology that could make these colder objects more visible, paving the way for enhanced exploration of deep space. The new technology uses a type II superlattice material called indium arsenide/indium arsenide antimonide (InAs/InAsSb).
Geckos and spiders seem to be able to sit still forever upside down. But sooner or later the grip is lost, no matter how little force is acting on it. Engineers, using scanning electron microscopy, have recently demonstrated why this is so by showing how heat, and the subsequent movement of molecules at the nanoscale, eventually force loss of adhesion.
When a superconductor is exposed to a magnetic field, a surface current creates a magnetic field that cancels the field inside the superconductor. This phenomenon, known as the Meissner-Ochsenfeld effect, was first observed in 1933. In a research first, scientists have succeeded in measuring an analogue of the Meissner effect in an optical crystal with ultracold atoms. This validates theoretical predictions dating back more than 20 years.
A new type of catalyst, based on carbon, can facilitate two opposite reactions: electrolysis of water and combustion of hydrogen with oxygen. This bi-functionality, developed by researchers in Germany, is made possible from its construction: manganese-oxide or cobalt-oxide nanoparticles which are embedded in specially modified carbon, then integrated with nitrogen atoms in specific positions.