Chemists from Brown Univ. have found a way to make new 2-D, graphene-like semiconducting nanomaterials using an old standby of the semiconductor world: silicon. In a paper published in Nanoletters, the researchers describe methods for making nanoribbons and nanoplates from a compound called silicon telluride. The materials are pure, p-type semiconductors that could be used in a variety of electronic and optical devices.
Water-borne algal blooms from farm fertilizer runoff can destroy aquatic life and clog rivers...
The sweet taste and smell of antifreeze tempts children and animals to drink the poisonous...
Employing an ingenious microfluidic design that combines chemical and mechanical properties, a team of Harvard Univ. scientists has demonstrated a new way of detecting and extracting biomolecules from fluid mixtures. The approach requires fewer steps, uses less energy, and achieves better performance than several techniques currently in use and could lead to better technologies for medical diagnostics and chemical purification.
Squid are the ultimate camouflage artists, blending almost flawlessly with their backgrounds so that unsuspecting prey can't detect them. Using a protein that's key to this process, scientists have designed "invisibility stickers" that could one day help soldiers disguise themselves, even when sought by enemies with tough-to-fool infrared cameras.
Chemical reactions involving reduction and oxidation, or redox, play a key role in regulating photosynthesis in plants and metabolism in animals and humans, keeping things running on an even keel. Now, in a recently published study, a team of scientists shed light on the role redox plays in cyanobacteria, tiny organisms with the potential to produce a lot of energy.
A Carnegie Institute-led team was able to discover five new forms of silica under extreme pressures at room temperature. Silica is one of the most-abundant natural compounds and a major component of the Earth's crust and mantle. It is well-known even to non-scientists in its quartz crystalline form, which is a major component of sand in many places. It is used in the manufacture of microchips, cement, glass and even some toothpaste.
New research published by Rutgers Univ. chemists has documented significant progress confronting one of the main challenges inhibiting widespread utilization of sustainable power: Creating a cost-effective process to store energy so it can be used later.
Green tea’s popularity has grown quickly in recent years. Its fans can drink it, enjoy its flavor in their ice cream and slather it on their skin with lotions infused with it. Now, the tea could have a new, unexpected role—to improve the image quality of MRIs. Scientists report in ACS Applied Materials & Interfaces that they successfully used compounds from green tea to help image cancer tumors in mice.
Researchers at the Univ. of Georgia have discovered that manipulation of a specific gene in a hardwood tree species not only makes it easier to break down the wood into fuel, but also significantly increases tree growth. In a paper, the researchers describe how decreasing the expression of a gene called GAUT12.1 leads to a reduction in xylan and pectin.
Graphene quantum dots made from coal, introduced in 2013 by the Rice Univ. laboratory of chemist James Tour, can be engineered for specific semiconducting properties in either of two single-step processes. In a new study, Tour and colleagues demonstrated fine control over the graphene-oxide dots’ size-dependent band gap, the property that makes them semiconductors.
A means by which the removal of carbon dioxide from coal-fired power plants might one day be done far more efficiently and at far lower costs than today has been discovered by a team of researchers with the Lawrence Berkeley National Laboratory. By appending a diamine molecule to the sponge-like solid materials known as MOFs, the researchers were able to more than triple the carbon dioxide-scrubbing capacity of the MOFs.
Repeatability underlies a researcher’s ability to control variation and increase sensitivity in an experiment. For sensitive analyses, such as cell-based assays, mass spectrometry and high-resolution protein structure determination, precise repeatability requires careful factorial design of experiments by systematically varying experimental parameters.
Univ. of New South Wales Australia scientists have developed a highly efficient oxygen-producing electrode for splitting water that has the potential to be scaled up for industrial production of the clean energy fuel, hydrogen. The new technology is based on an inexpensive, specially coated foam material that lets the bubbles of oxygen escape quickly.
One of life's strongest bonds has been discovered by a science team researching biofuels with the help of supercomputers. Their find could boost efforts to develop catalysts for biofuel production from non-food waste plants.
Research led by a Brown Univ. graduate student has revealed a new way to make light-absorbing perovskite films for use in solar cells. The new method involves a room-temperature solvent bath to create perovskite crystals, rather than the blast of heat used in current crystallization methods.
Liquid chromatography-mass spectrometry (LC-MS) is taking over as an analytical technique of choice in diverse fields. While a LC-MS analyst may be tempted to rely on the most commonly used sample prep techniques, columns and mobile phases in his/her field, we show successful LC-MS demands these workflow elements be chosen with the physico-chemical properties of the analyte in mind.
The pistons in your car engine rub up against their cylinder walls thousands of times a minute; without lubrication in the form of motor oil, they and other parts of the engine would quickly wear away, causing engine failure. Motor oil contains chemical additives that extend how long engines can run without failure, but, despite decades of ubiquity, how such additives actually work to prevent this damage have remained a mystery.
As with magnets and alternating current, positively charged molecules never aim for one another. Indeed, similarly charged poles are repelled. Nevertheless, a team from the Univ. of Copenhagen managed to become the first to bond positively charged phosphorus atoms with positively charged hydrogen ones. Their insight may prove pivotal to understanding how biologically important molecules such as DNA and proteins form properly.
For the last seven years, Yale Univ. graduate student Staff Sheehan has been working on splitting water. Now, a paper published in Nature Communications reveals how one of the methods he and his team have uncovered for this process, using a specific iridium species as a water oxidation catalyst, could aid in the development of renewable fuels.
Unique proteins newly discovered in heat-loving bacteria are more than capable of attaching themselves to plant cellulose, possibly paving the way for more efficient methods of converting plant matter into biofuels. The unusual proteins, called tapirins, bind tightly to cellulose, a key structural component of plant cell walls, enabling these bacteria to break down cellulose.
A new molecule-making machine could do for chemistry what 3-D printing did for engineering: Make it fast, flexible and accessible to anyone. Chemists at the Univ. of Illinois built the machine to assemble complex small molecules at the click of a mouse, like a 3-D printer at the molecular level. The automated process has the potential to greatly speed up and enable new drug development and other technologies that rely on small molecules.
Univ. of California, Berkeley chemists have made a major leap forward in carbon-capture technology with a material that can efficiently remove carbon from the ambient air of a submarine as readily as from the polluted emissions of a coal-fired power plant. The material then releases the carbon dioxide at lower temperatures than current carbon-capture materials.
The editors of R&D Magazine have announced an eligibility extension for products to be entered into the 2015 R&D 100 Awards. The 2015 R&D 100 Awards will honor products, technologies and services that have been introduced to the market between January 1, 2014 and March 31, 2015.
In a study published in Nature Chemistry, Univ. of Wisconsin-Madison chemistry Prof. Kyoung-Shin Choi presents a new approach to combine solar energy conversion and biomass conversion, two important research areas for renewable energy. For decades, scientists have been working to harness the energy from sunlight to drive chemical reactions to form fuels such as hydrogen, which provide a way to store solar energy for future use.
New York Univ. chemists have developed a computational approach for determining the viability and suitability of complex molecular structures—an advancement that could aid in the development of pharmaceuticals as well as a range of other materials.
Lithium-ion batteries are common in consumer electronics. Beyond consumer electronics, lithium-ion batteries have also grown in popularity for military, electric vehicle and aerospace applications. Now, researchers at Arizona State Univ. are exploring new energy storage technology that could give the battery an even longer lifecycle.
When it comes to boiling water, is there anything left for today’s scientists to study? The surprising answer is, yes, quite a bit. How the bubbles form at a surface, how they rise up and join together, what are the surface properties, what happens if the temperature increases slowly versus quickly. While these components might be understood experimentally, the mathematical models for the process of boiling are incomplete.
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