Latest Photoelectric effect Stories
redOrbit Staff & Wire Reports - Your Universe Online Researchers at the University of Exeter have reportedly developed a new flexible and transparent photoelectric device that converts light into electrical signals by taking advantage of a pair of recently discovered materials. The device, which is detailed in the latest edition of the journal ACS Nano, exploits the unique properties of graphene, the thinnest conductive material on Earth, and graphExeter, the best-known room...
Lawrence Berkeley National Laboratory Berkeley Lab scientists discover how a photon beam can flip the spin polarization of electrons emitted from an exciting new material Plain-looking but inherently strange crystalline materials called 3D topological insulators (TIs) are all the rage in materials science. Even at room temperature, a single chunk of TI is a good insulator in the bulk, yet behaves like a metal on its surface. Researchers find TIs exciting partly because the electrons...
Balluff's new family of 18M photoelectric tubular sensors features a variety of sensing models in a rugged metal housing with long range sensing capability. Florence, KY (PRWEB) June 13, 2012 The new generation of BOS 18M photoelectric sensors from Balluff demonstrate expertise in every form of light for maximum precision throughout the product range. These sensors feature a generous sensing distance and high function reserve. Models include energetic diffuse, retro-reflective and...
Ability to probe deep below material surfaces should be boon for nanoscale devices The expression "beauty's only skin-deep" has often been applied to the chemistry of materials because so much action takes place at the surface. However, for many of the materials in today's high technologies, such as semiconductors and superconductors, once a device is fabricated it is the electronic structures below the surface, in the bulk of the material or in buried layers, that determine its...
Scientists can now look deeper into new materials to study their structure and behavior, thanks to work by an international group of researchers led by UC Davis and the Lawrence Berkeley National Laboratory and published Aug. 14 by the journal Nature Materials.The technique will enable more detailed study of new types of materials for use in electronics, energy production, chemistry and other applications.The technique, called angle-resolved photoemission, has been used since the 1970s to...
New theory of 'Extremely Correlated Fermi Liquids' may explain anomalous photoemission spectra of high-temperature superconductorsAlthough high-temperature superconductors are widely used in technologies such as MRI machines, explaining the unusual properties of these materials remains an unsolved problem for theoretical physicists. Major progress in this important field has now been reported by physicists at the University of California, Santa Cruz, in a pair of papers published back-to-back...
Balluff's new line of BKT 67M contrast sensors are perfect for detecting brightness differences in parts, labels, and imprints on packaging. Florence, KY (Vocus/PRWEB) March 15, 2011 Balluff's new family of BKT 67M contrast sensors can detect even the slightest contrast differences in challenging packaging applications. These sensors are specifically designed for fast and reliable print mark detection. The BKT family of contrast sensors feature a rugged metal housing, and a rotatable...
Characterizing photoelectrons with quantum point contactsAt the heart of the method is a so-called quantum point contact (QPC). This is a narrow conductive channel in a semiconductor circuit. The scientists created a 70-nanometer narrow channel, about as wide as the wavelength of electrons in the semiconductor. The key is that only one electron at a time will fit through the channel, making possible extremely high-precision measurements of the electric current. As described in the current...
With extremely short wavelengths and very high intensities, light-matter interaction seems to be different than previously acceptedBy way of the classical photoeffect, Einstein proved in 1905 that light also has particle character. However, with extremely high light intensities, remarkable things happen in the process. Scientists of the Physikalisch-Technische Bundesanstalt (PTB) have found this out with colleagues at FLASH in Hamburg, the first free-electron laser (FEL) for soft X-rays...
New study finds that household photoelectric alarms are more likely to remain workingIf you thought all smoke alarms were equally effective, think again. According to a recent study by researchers from the Harborview Injury Prevention and Research Center (HIPRC) and the University of Washington in Seattle, photoelectric smoke alarms are much more likely to remain functioning after installation than are ionization alarms. Ionization alarms are the most common type found in U.S....
