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Researchers have proposed and demonstrated a phonon laser using an optically levitated nanoparticle. A phonon is a quantum of energy associated with a sound wave. The researchers studied the mechanical vibrations of the nanoparticle, which was levitated against gravity by the force of radiation at the focus of an optical laser beam.
Scientists at the U.S. Naval Research Laboratory have developed and patented the fabrication of a transparent, luminescent material they say could give smartphone and television screens flexible, stretchable, and shatterproof properties.
Scientists at the U.S. Naval Research Laboratory have developed and patented the fabrication of a transparent, luminescent material they say could give smartphone and television screens flexible, stretchable, and shatterproof properties.
Engineers have developed a novel fabrication method to create dyed threads that change color when they detect a variety of gases. The researchers demonstrated that the threads can be read visually or by use of a smartphone camera to detect changes of color due to analytes as low as 50 parts per million. These gas-detecting threads could be used in medical, workplace, military, and rescueaenvironments.
Engineers have developed a novel fabrication method to create dyed threads that change color when they detect a variety of gases. The researchers demonstrated that the threads can be read visually or by use of a smartphone camera to detect changes of color due to analytes as low as 50 parts per million. These gas-detecting threads could be used in medical, workplace, military, and rescue environments.
Researchers have converted metallic gold into a two-dimensional semiconductor and customized the material atom-by-atom on boron nitride nanotubes. Two-dimensional semiconductors are promising materials for quantum computing, future electronics, and optical devices.
Researchers have converted metallic gold into a two-dimensional semiconductor and customized the material atom-by-atom on boron nitride nanotubes. Two-dimensional semiconductors are promising materials for quantum computing, future electronics, and optical devices.
Engineers have used “deep learning” techniques to speed up simulations of novel two-dimensional materials and to gain a better understanding of their characteristics and how they are affected by high temperature and radiation.
Engineers have used “deep learning” techniques to speed up simulations of novel two-dimensional materials and to gain a better understanding of their characteristics and how they are affected by high temperature and radiation.
A lithium battery can catch fire because of the high temperatures and rapid charging and discharging, or cycling, in the battery. These conditions can cause the cathode inside the battery to decompose and release oxygen, which can cause spontaneous combustion in the battery. Researchers have discovered that when they wrapped small particles of the lithium cobalt oxide cathode of a lithium battery in graphene, the battery’s loss in capacity was of about 14% after rapid cycling, compared to a loss in capacity of about 45% in a conventional lithium metal battery.
