Nearly all electronics require devices called oscillators that create precise frequencies - frequencies used to keep time in wristwatches or to transmit reliable signals to radios. For nearly a century, these oscillators have relied upon quartz crystals to provide a frequency reference, much like a tuning fork is used as a reference to tune a piano. A new approach could ultimately replace the quartz crystal frequency reference - technology in use since the 1920s.
Researchers have demonstrated that an array of novel gold, pillar-bowtie nanoantennas can be used like traditional photographic film to record light for distances that are much smaller than the wavelength of light. A standard optical microscope acts as a 'nanocamera' whereas the pillar-bowtie nanoantennas are the analogous film.
Researchers have developed the first ab initio method for characterizing the properties of 'hot carriers' in semiconductors. This should help clear a major road block to the development of new, more efficient solar cells.
Physicists have created a unique combination of computer models, based on the theory of quantum mechanics, and applied them to a previously well characterised protein found in muscle to develop a new picture of how biomolecules transport and store oxygen.
This structure composed of multiple holes array by filling it with nonlinear medium combines the characteristics of selectable wavelength, enhanced transmission, polarization separation and output control by the intensity of incident light. This result is useful for integrated optical circuits and on-chip optical interconnects.
Scientists have developed a new technique to enhance stroke treatment that uses magnetically controlled nanomotors to rapidly transport a clot-busting drug to potentially life-threatening blockages in blood vessels.
Wissenschaftler haben ein neues Verfahren entwickelt, um die Reibungskräfte in Schmierstoffen auf molekularer Ebene zu messen. Dabei konnten sie den schichtartigen molekularen Aufbau des eigentlich flüssigen Schmierstoffs deutlicher sehen als mit bislang gängigen Methoden.