A research team has been able to tune “coherence” in organic nanostructures due to the surprise discovery of wavelike electrons in organic materials. The finding reveals the key to generating long-lived charges in organic solar cells, which could represent the next major advance in solar technology.
Researchers have tuned coherence in organic nanostructures due to the surprise discovery of wave...
Strategies to manipulate light and sound go back to the first spherical glass bead and the...
Networks of nanometer-scale machines offer exciting potential applications in medicine, industry...
A research team in France has invented an adhesion method that creates a strong bond between two gels by spreading on their surface a solution containing nanoparticles. Until now, there was no entirely satisfactory method of obtaining adhesion between two gels or two biological tissues. The bond is resistant to water and uses no polymers or chemical reactions.
One of the most difficult hurdles in adapting carbon nanotubes to industrial purposes is processing the carbon nanotubes into smaller forms to allow them to more easily disperse. However, recent research has managed to cut carbon nanotubes into the smallest dimensions ever to overcome this problem.
A unique solar panel design made with a new ceramic material points the way to potentially providing sustainable power cheaper, more efficiently, and requiring less manufacturing time. It also reaches a four-decade-old goal of discovering a bulk photovoltaic material that can harness energy from visible and infrared light, not just ultraviolet light.
Rice Univ. bioengineers have developed a hydrogel scaffold for craniofacial bone tissue regeneration that starts as a liquid, solidifies into a gel in the body and liquefies again for removal. The material developed in a Rice laboratory is a soluble liquid at room temperature that can be injected to the point of need. At body temperature, it turns into a gel to help direct the formation of new bone to replace that damaged by injury.
There are examples of art imitating nature all around us, from Monet to Chihuly, but when physicist Latika Menon peered under the electron microscope last fall, she discovered the exact opposite in gallium nitride nanowires that bore an uncanny resemblance to artistic pots found in her native India. Menon has begun to control these shapes, which will make the nanowires significantly more promising for use in advanced devices.
Figuring that if some is good, more must be better, researchers have been trying to pack more graphene, a supermaterial, into structural composites. Collaborative research led by Univ. of Nebraska-Lincoln materials engineers discovered that, in this case, less is more. The team learned that using a small amount of graphene oxide as a template improves carbon nanomaterials which, in turn, promises to improve composite materials.
Solar cells made with low-cost, nontoxic quantum dots can achieve unprecedented longevity and efficiency, according to a study by Los Alamos National Laboratory and Sharp Corp. The reported solar cells are based on nontoxic quantum dots. These dots are based on copper indium selenide sulfide and are rigorously optimized to reduce charge-carrier losses from surface defects and to provide the most complete coverage of the solar spectrum.
By applying pressure to a semiconductor, researchers have been able to transform a semiconductor into a “topological insulator” (TI), an intriguing state of matter in which a material’s interior is insulating but its surfaces or edges are conducting with unique electrical properties. This is the first time that researchers have used pressure to gradually “tune” a material into the TI state.
In the late 1980s, when setting up his first laboratory, an asst. prof. of chemistry at the Univ. of South Carolina had a conversation with a scientist at IBM Yorktown, Avi Aviram, who had recently authored a paper speculating on a new type of perpendicularly shaped molecule that, if artificially created and equipped with active sensing points, could be used as a molecular switch for computing.
The first LCD television was invented in 1972 at Westinghouse in Pennsylvania. Like many important inventions, it didn’t become a common sight in the average home for several decades. It took the combined efforts of many researchers and several corporations to create a display of acceptable quality in the late 1990s. In the early 2000s, another innovation helped set the stage for the proliferation of LCD displays: Multilayer Optical Film.
By using optical techniques, researchers in Switzerland are now able to measure the concentration of the oxidizing substances produced by a damaged cell. This new biosensing technique for toxic agents also offers a new way to know more about the mechanisms of oxidative stress.
With the help of the x-ray light source PETRA III, researchers in Germany have, for the first time, watched organic solar cells degrade in real time. This work could open new approaches to increasing the stability of this highly promising type of solar cell, which is known for its flexibility and low cost but has a short lifespan.
Univ. of Oregon chemists studying the structure of ligand-stabilized gold nanoparticles have captured fundamental new insights about their stability. The information, they say, could help to maintain a desired, integral property in nanoparticles used in electronic devices, where stability is important.
Heating a sheet of plastic may not bring it to life, but it sure looks like it does in new experiments at Rice Univ. The materials created by Rice polymer scientist Rafael Verduzco and his colleagues start as flat slabs, but they morph into shapes that can be controlled by patterns written into their layers.
Carbon nanotubes carry plasmonic signals in the terahertz range of the electromagnetic spectrum, but only if they’re metallic by nature or doped. In new research, the Rice Univ. laboratory of physicist Junichiro Kono disproved previous theories that dominant terahertz response comes from narrow-gap semiconducting nanotubes.
For nearly 50 years, contact lenses have been proposed as a means of ocular drug delivery that may someday replace eye drops, but achieving controlled drug release has been a significant challenge. Researchers in Massachusetts have made an advance in this direction with the development of a drug-eluting contact lens designed for prolonged delivery glaucoma medication.
Researchers in Lyon, a French city famed for its cuisine, have discovered a quick-cook recipe for copious volumes of hydrogen that involves water, rock, aluminum oxide and extreme pressure. The breakthrough suggests a better way of producing the hydrogen that propels rockets and energizes battery-like fuel cells.
Researchers in Singapore and at IBM Research in California have discovered a new, potentially life-saving application for polyethylene terephthalate (PET), which is widely used to make plastic bottles. They have successfully converted PET into a non-toxic biocompatible material with superior fungal killing properties. This could help prevent and treat various fungus-induced diseases such as keratitis.
The chemicals and advanced materials industry consists of large multinational companies serving nearly every other market, key single market material and application development firms and an array of smaller, niche chemical and material companies.
Transistors, the workhorses of the electronics world, are plagued by leakage current. This results in unnecessary energy losses, which is why smartphones and laptops, for example, have to be recharged so often. Researchers have recently shown that this leakage current can be radically reduced by “squeezing” the transistor with a piezoelectric material. Using this approach, they have surpassed the theoretical limit for leakage current.
Are electrons truly round? More specifically, is the electron’s charge between its poles uniform? A group at JILA has tackled this difficult question and has developed a method of spinning electric and magnetic fields around trapped molecular ions to measure the tiny electrons. They haven’t yet matched other electric dipole moment measurement techniques, but eventually the new method should surpass them.
A researcher team from Spain and Italy say that when envisioning in vivo microrobots of the future, we should forget cogwheels, pistons and levers. These miniature robots will be soft, and behave much like euglenids, tiny unicellular aquatic animals. Their work in studying these creatures have given them insights on how to design soft robots with effective mechanical structures.
High-temperature superconductors exhibit a frustratingly varied catalog of odd behavior, such as electrons that arrange themselves into stripes or refuse to arrange themselves symmetrically around atoms. Now two physicists propose that such behaviors, and superconductivity itself, can all be traced to a single starting point, and they explain why there are so many variations.
Researchers have combined cutting-edge experimental techniques and computer simulations to find a new way of predicting how water dissolves crystalline structures like those found in natural stone and cement. The research could have wide-ranging impacts in diverse areas, including water quality and planning, environmental sustainability, corrosion resistance and cement construction.
The prospect of turning coal into fluorescent particles may sound too good to be true, but the possibility exists, thanks to scientists at Rice Univ. The Rice laboratory of chemist James Tour found simple methods to reduce three kinds of coal into graphene quantum dots (GQDs), microscopic discs of atom-thick graphene oxide that could be used in medical imaging as well as sensing, electronic and photovoltaic applications.
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