The demonstration of electroluminescence at terahertz frequencies from a silicon-germanium device marks a key step towards the long-sought goal of a silicon-based laser.
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IMAGE: Basic concept of THz-field-driven scanning tunneling luminescence (THz-STL) spectroscopy. Luminescence from a localized plasmon can be induced by THz-field-driven inelastically tunneled electrons. view more
Credit: Yokohama National University
Since the early 2010s, ultrafast probing of materials at atomic-level resolution has been enabled by terahertz scanning tunneling microscopes (THz-STM). But these devices can t detect the dissipation of energy that happens during events such as when photons are emitted via recombination process of an electron-hole pair in a light emitting diode (LED). However, a new technique allows the tracking of just such energy dynamics alongside THz-STM, opening up new avenues of investigation for nanoscale science and technology.
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IMAGE: Images show myelinated axons in biomaterial scaffolds eight weeks after injection into the injured cord of a mouse. Scaffolds were fabricated from hyaluronic acid (HA) with a regular network of. view more
Credit: Seidlits et al.
WASHINGTON, March 9, 2021 Spinal cord injuries can be life-changing and alter many important neurological functions. Unfortunately, clinicians have relatively few tools to help patients regain lost functions.
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APL Bioengineering, by AIP Publishing, researchers from UCLA have developed materials that can interface with an injured spinal cord and provide a scaffolding to facilitate healing. To do this, scaffolding materials need to mimic the natural spinal cord tissue, so they can be readily populated by native cells in the spinal cord, essentially filling in gaps left by injury.