Physicists explain metallic conductivity of thin carbon nanotube films
An international team of researchers has examined the optical and dielectric properties of thin macroscopic films based on single-walled carbon nanotubes and obtained an explanation for the metallic...
View ArticleTwisting molecule wrings more power from solar cells
Inside a solar cell, sunlight excites electrons. But these electrons often don't last long enough to go on to power cell phones or warm homes. In a promising new type of solar cell, the solar-excited...
View ArticleNew quantum materials offer novel route to 3-D electronic devices
Researchers have shown how the principles of general relativity open the door to novel electronic applications such as a three-dimensional electron lens and electronic invisibility devices. In a new...
View ArticleScientists analysed how a special treatment improves cheap metal oxide...
The fossil fuel age is bound to end, for several strong reasons. As an alternative to fossil fuels, hydrogen seems very attractive. The gas has a huge energy density, it can be stored or processed...
View ArticleSolar cells with nanostripes
Solar cells based on perovskites reach high efficiencies: They convert more than 20 percent of the incident light directly into usable power. On their search for underlying physical mechanisms,...
View ArticleCapacitor withstands temperatures of up to 300 degrees Celsius
Heat, dust and moisture damage electronic components. Protecting against dust and moisture is fairly straightforward, but heat remains a problem because it is created within the component itself....
View ArticleBuilt from the bottom up, nanoribbons pave the way to 'on-off' states for...
A new way to grow narrow ribbons of graphene, a lightweight and strong structure of single-atom-thick carbon atoms linked into hexagons, may address a shortcoming that has prevented the material from...
View ArticleTesting the performance of semiconductors—with light
Semiconductors are the cornerstone of modern electronics. They're used in solar cells, light emitting diodes (LEDs), microprocessors in laptops and cell phones, and more. Most of them are made of...
View ArticleMetamaterial: Mail armor inspires physicists
The Middle Ages certainly were far from being science-friendly: Whoever looked for new findings off the beaten track faced the threat of being burned at the stake. Hence, the contribution of this era...
View ArticleWhy the phase-change material iron-tellurium best conducts electricity in its...
Solid materials whose atoms are arranged in a well-ordered crystalline structure are usually better conductors of electricity than randomly structured, or amorphous, solids. Recently, however, A*STAR...
View ArticleLow-cost and defect-free graphene
Graphene is one of the most promising new materials. However, researchers across the globe are still looking for a way to produce defect-free graphene at low costs. Chemists at...
View ArticleChallenging the 'rigidity' for smart soft electronics
Soft electronic devices, such as a smartphone on your wrist and a folding screen in your pocket, are looking to much improve your lifestyle in the not-too-distant future. That is, if we could find ways...
View ArticleElectrical properties of superconductor altered by 'stretching'
In the early 1970s, in the basement of Clark Hall, the Cornell team of professors David Lee and Robert Richardson, along with then-graduate student Douglas Osheroff, first observed superfluid helium-3....
View ArticleResearchers find new method for doping single crystals of diamond
Along with being a "girl's best friend," diamonds also have remarkable properties that could make them ideal semiconductors. This is welcome news for electronics; semiconductors are needed to meet the...
View ArticlePhotocatalytic reductions occur in slow time scales
With the increasing need for renewable fuels scientists have attempted to harvest abundant sunlight while simultaneously reducing CO2. However, the process is generally inefficient and many aspects...
View ArticleNew world record for fullerene-free polymer solar cells
Polymer solar cells can be even cheaper and more reliable thanks to a breakthrough by scientists at Linköping University and the Chinese Academy of Sciences (CAS). This work is about avoiding costly...
View ArticleRiddle of missing efficiency in zinc oxide-based dye-sensitised solar cells...
To convert solar energy into electricity or solar fuels, you need specialised systems of materials such as those consisting of organic and inorganic thin films. Processes at the junction of these films...
View ArticleResearchers identify specific defects in LED diodes that lead to less...
Using state-of-the-art theoretical methods, UCSB researchers have identified a specific type of defect in the atomic structure of a light-emitting diode (LED) that results in less efficient...
View ArticleScientists push valleytronics one step closer to reality
Scientists with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) have taken a big step toward the practical application of "valleytronics," which is a new type of...
View ArticleFerrite boosting photocatalytic hydrogen evolution
Photocatalytic hydrogen generation via water splitting has become a hot spot in the field of energy and materials. The goal of this technique is to construct cheap and efficient photocatalytic water...
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