Showing Spotlights 49 - 56 of 252 in category All (newest first):
The basic idea of valleytronics is to pass information through two-dimensional (2D) and other very thin conducting materials using the energy valleys - or energy extrema - in their conduction and valence bands. Information can be transmitted by controlling an electron's association with a valley - a manipulation that can be achieved using electric fields, magnetic fields and circularly polarized light. Researchers now have demonstrated a room-temperature approach to manipulating quantum-information carriers, which is usually volatile at room temperature, in a monolayer WSe2 semiconductor.
Oct 24th, 2019
A novel and very promising design strategy for stretchable electronics is based on liquid metals; specifically the use of the oxide shell of liquid gallium alloys to fabricate polymerized liquid metal networks (Poly-LMNs). The novel attribute of these Poly-LMNs is that they increase in conductivity as they are elongated, resulting in the measured resistance across the conductor remaining nearly unchanged as they are stretched to 700% their original length. The implication of this effect is that a circuit can now be designed with a stretchable Poly-LMN wire that won?t change its resistance when stretched.
Oct 3rd, 2019
By studying flexible and transparent photodetectors based on single-layer MoS2 under the application of biaxial strain, researchers have developed atomically thin photodetectors whose characteristics can be controlled by means of an externally applied strain. This strain can be reversibly applied through the thermal expansion (shrinkage) of the substrate material, which induces tensile (compressive) biaxial stress. These results emphasize the possibilities of a new kind of electronics - straintronics - in which mechanical deformations are used to modify not only the geometry of the device, but its properties and performance as well.
Aug 22nd, 2019
There is a huge effort underway to use memristor devices in neuromorphic computing applications and it is now reasonable to imagine the development of a new generation of artificial intelligent devices with very low power consumption (non-volatile), ultra-fast performance and high-density integration. In new work,r esearchers were not only able to achieve to small switching effects in memristors using light, they take advantage of a percolating-like nanoparticle morphology to vastly increase the magnitude of the switching between electronic resistance states when light is incident on the device.
Jun 19th, 2019
Electronic transitions between confined states within a quantum well are widely used in optoelectronics. Familiar examples include quantum cascade lasers and quantum well infrared photodetectors, which can operate in a wide range of wavelengths, from the far- to near-infrared. There is growing interest in studying this phenomenon because it may enable novel devices such as polariton lasers and because the physics of ISB polaritons is relatively unexplored. Researchers now demonstrated that it is possible to study polaritons in a single isolated nanoantenna.
Jun 18th, 2019
Proton radiation damage is an important failure mechanism for electronic devices in near-Earth orbits and deep space. The future of space exploration depends crucially on the development of new electronic technologies that are immune to space radiation, which consists primarily of protons, electrons, and cosmic rays. The penetrating energetic radiation of deep space produces negative impacts on not only biological entities but also the electronic systems of space vehicles. Researchers have now demonstrated two-dimensional charge-density-wave devices with a remarkable immunity to bombardment with protons.
Apr 22nd, 2019
Ionic conductors are a class of materials with key roles in energy storage, solar energy conversion, sensors, and electronic devices. In their quest towards eco-friendly alternatives for the current type of ionic conductors, researchers have developed an alternative green option based on organic silk and inorganic green laponite for the display and wearables industry via flexible and eco-friendly ionics. This could ultimately enable a wide range of applications within the field of flexible and wearable electronics.
Mar 5th, 2019
Sluggish electron transport kinetics - also known as aging - has hindered the application of graphene, for example, as transparent photodiode sensors in optoelectronics, graphites for effective use as oxygen reducing agents in fuel cells and so many other applications that involve fast heterogeneous electron transport and even increased capacitance. Scientists now report a breakthrough solution to the oxidation-induced sluggish electron transport in graphite (and even graphene).
Jan 8th, 2019
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