Articles tagged with Voltage
A team of scientists from Bielefeld and Berlin successfully controlled graphene's nonlinearity by applying modest electrical voltages, enabling efficient processing of high-frequency signals. This breakthrough paves the way for using graphene in THz frequency converters, mixers, and modulators.
Researchers have developed a new dye called MS5 that significantly enhances the efficiency of dye-sensitized solar cells (DSSCs), which are already being manufactured on a large scale. The new dye produces an open-circuit voltage of 1.24 Volts and achieves a power conversion efficiency of 13.5%, surpassing previous records in the field.
Cornell University researchers developed micron-sized shape memory actuators that enable atomically thin materials to fold themselves into 3D configurations. These tiny machines can hold their shape even after voltage is removed, enabling potential applications in nano-robots and smart materials.
Scientists have developed a new material with faster and more efficient electrochromic properties than existing materials. The material, called Covalent Organic Frameworks (COFs), can be triggered by an applied electrical voltage, allowing for rapid color change and high sensitivity to electrochemical oxidation.
Researchers at Cornell University have created a micron-sized self-folding origami bird using shape memory actuators. The device can fold itself into 3D configurations within 100 milliseconds and holds its shape even after the voltage is removed.
Scientists at Empa and ETH Zurich create piezoelectric wood by dissolving lignin using a biological process, resulting in an elastic material that generates a voltage when deformed. The technology has potential applications as a sensor or electricity-generating floor, and researchers are exploring its industrial feasibility.
Researchers found that exotic metallic materials exhibit poor electrical conductivity due to tiny amounts of impurities or defects. These defects cause electrons to remain localized, hindering current flow at low frequencies, but allowing it at high frequencies.
A team from Terasaki Institute for Biomedical Innovation developed soft pressure sensors using OECTs and ionic hydrogels, enabling high sensitivity and low power consumption. This advancement facilitates long-term monitoring of patients with real-time data collection.
Dresden researchers have developed a novel device concept combining vertical organic permeable base transistors and OLEDs, achieving high efficiencies and low driving voltages. The new strategy paves the way for highly-efficient flexible displays with simple pixel designs.
Researchers at University of Science and Technology of China launched an isolated power supply chip with a new design, achieving 46.5% peak transformation efficiency. The chip's power density is also improved to 50mW/mm2, making it more efficient than traditional designs.
The Tibet ASgamma experiment has discovered gamma rays beyond 100 TeV from a supernova remnant, suggesting that cosmic-ray nuclei are accelerated up to PeV energy and collide with a nearby molecular cloud. This discovery identifies the first candidate object in the Milky Way that can accelerate cosmic rays up to 1 PeV.
Researchers have made a significant advance in understanding oxygen-redox processes involved in lithium-rich cathode materials, proposing strategies to mitigate limitations and increase energy density. The breakthrough offers potential routes to more reversible high-energy density Li-ion cathodes.
Researchers find giant Hall effect in material Ce3Bi4Pd3, exceeding theoretical predictions by a thousand times. The effect is caused by complex electron interactions and the Kondo effect, leading to unexpected potential for next-generation quantum technologies.
Researchers have discovered a promising mechanism to create nanoelectronics components by reducing current to zero in quantum point contacts. The discovery uses external oscillating fields and provides evidence of non-equilibrium phase transitions, enabling precise control of charge transport.
Scientists have created a highly sensitive graphene-based terahertz detector, outperforming commercial analogs. The device's exceptional sensitivity enables faster data transfer rates, opening up prospects for applications in wireless communications, security systems, and medical diagnostics.
A novel molecular voltage sensor allows researchers to observe the propagation of electrical signals in living nerve cells with high precision. This enables investigations into completely new questions about brain function and could lead to a better understanding of neurological diseases.
Scientists have synthesized a biomolecule that resembles a natural anisotropic dual-stimuli-responsive channel, allowing for the creation of advanced biosensors and drug alternatives. The channel, called VF, can be activated by two specific stimuli dependent on its biased orientation within the membrane.
Researchers have found that tiny diamonds can form in the presence of small electric fields, which play a central role in their creation. The experiments conducted by the Russian research team showed that applying less than one volt triggers a chemical transformation process, resulting in pure carbon in the form of diamond.
Researchers at Skoltech have discovered a mixed oxide Na(Li1/3Mn2/3)O2 that shows promise as a cathode material for sodium-ion batteries. The compound exhibits high energy density, no voltage fade over multiple charge cycles, and moisture stability.
A team of scientists has achieved strong tricolor photoluminescence (PL) in non-photoluminescent pyrochlore Ho2Sn2O7 under high-pressure treatment. The PL is retained and largely enhanced after pressure release, with the potential applications for pressure threshold sensors on extreme conditions.
Researchers at University at Buffalo have developed a new, two-dimensional transistor made of graphene and molybdenum disulfide that requires half the voltage of current semiconductors. The device can handle a greater current density, making it key to meet the demand for power-hungry nanoelectronic devices.
Researchers at MIT have found a way to overcome oxide trapping issues, allowing InGaAs transistors to compete with silicon technology. The alloy's electron transport properties enable faster calculations and improved energy efficiency.
A team of researchers led by Nagoya University has discovered that killer electrons, resulting from the pulsating aurora, could be involved in ozone destruction. The high-energy electrons are believed to cause damage when they penetrate satellites, and their presence in the middle atmosphere is associated with the pulsating aurora.
Researchers have identified the molecular mechanism by which tarantula venom traps voltage sensors on sodium channels, effectively immobilizing nerve signals. This finding may lead to the development of new pain therapeutics that target the Nav1.7 channel, a key player in pain transmission.
Scientists from the University of Groningen discovered how strontium titanium oxide can change its resistance based on changes in the number of electrons or accumulation of oxygen vacancies. This finding opens up new paths to memristive heterostructures combining ferroelectric materials and graphene.
Researchers have created a magnetic switch that requires less energy to alter its orientation, a potential breakthrough in storing data in personal electronics. The new technology uses voltage instead of current to reorient magnetic materials, resulting in significant energy savings.
Scientists create one-dimensional array of individual molecules and precisely control its electronic structure. By manipulating individual molecules, they can create alternating charge patterns, allowing for information transfer in tiny circuits.
Researcher from Max Planck Institute applied large hydrostatic pressures to CeFeAsO, a non-superconducting compound. The study reveals a narrow superconducting phase emerging in the boundary region between spin-density-wave magnetism and Kondo-effect.
Researchers at Berkeley Lab have developed a precision photon source made from an atomically thin semiconducting material, enabling the generation of single, identical photons. This breakthrough could aid in developing secure and fast quantum communication networks.
Physicists at Aalto University have developed a new detector that can measure energy quanta with unprecedented resolution, overcoming limitations in current state-of-the-art detectors used in quantum computers. The graphene bolometer achieves speeds of well below a microsecond and higher theoretical accuracy than voltage measurements.
A bioelectronic device driven by a machine learning algorithm successfully controlled the membrane voltage of human stem cells for 10 hours. The closed-loop system countered the natural self-regulating feedback process known as homeostasis, which is essential for cell physiology and functions.
The study reveals that the insulating ground state in NaOsO3 can be preserved up to 35 GPa, with a sluggish metal-insulator transition reduction from 410 K to near room temperature. The team also finds hidden hysteretic resistance properties and electronic character anomalies under pressure.
Scientists at UC San Diego have developed a new anode material that enables safer, faster lithium-ion battery charging. The Li3V2O5 disordered rocksalt offers improved safety and energy density, with the potential to replace graphite and lithium titanate anodes.
Scientists at the University of Minnesota have successfully electrically transformed iron sulfide, or 'fool's gold', into a magnetic material. This breakthrough could lead to the creation of valuable new magnetic materials for more efficient computer memory devices.
Researchers at Oak Ridge National Laboratory have developed a hybrid inverter platform that connects local energy resources to the utility power grid, enabling autonomous, distributed energy systems. The platform can interact with various control systems and support real-time monitoring for better system stability.
Researchers from NC State University demonstrate a technique to produce streams of liquid metal at room temperature by applying a low voltage, lowering its surface tension across three orders of magnitude. The study reveals the potential applications for this technique in creating stretchable wires and studying fluid behavior.
Researchers from Texas A&M University designed a single device called PINE that improves energy delivery between home solar-power systems and the electrical grid. The device regulates grid voltage, integrates solar energy, and manages energy flow, making homes less dependent on the external power grid during blackouts.
A new type of electrochromic display has been developed using zinc-based materials, enabling transparent multicolour switching. The display exhibits reversible colour changes and maintains a semitransparent state with a colour overlay effect that broadens the colour palette.
Researchers have identified the structural changes and metallization caused by external pressure in hybrid Perovskite solar cells. The study provides a theoretical explanation for phase transition and metallization, paving the way for high-performance solar cell materials that can withstand extreme environments.
Researchers developed a technique to modify defect populations in perovskite crystals without chemical additives, enabling the material to act as a memristor device with multiple resistance states. The voltage regulation engineering helps improve optical and electrical properties by passivating deep-level donor-like defects.
A new study has developed a thermoelectric device that harnesses solar energy to generate power continuously day and night, regardless of weather conditions. The device uses a wavelength-selective emitter to create a temperature difference, resulting in constant voltage generation.
Researchers created a nanoscale gap between gold electrodes and found that excited electrons leaping the gap emitted bright light. The effect depends on metal's plasmons, ripples of energy flowing across its surface.
Engineers have developed high-power direct borohydride fuel cells that can power unmanned underwater vehicles and drones with significantly lower cost. The new fuel cells operate at double the voltage of conventional hydrogen fuel cells, allowing for a smaller and more efficient design.
Scientists find electricity generated by interactions between water molecules and metals can be harnessed to create a new source of energy. The study reveals that high humidity levels above 60% can produce voltages up to one volt, offering potential for developing batteries charged from water vapor in the air.
Researchers develop implant that uses magnetic energy to produce high-frequency signals for treating epilepsy, Parkinson's disease, chronic pain and other conditions. The miniaturization enables wireless power delivery and minimally invasive procedure.
An international team of researchers has developed a new type of molecular circuit switch that can operate as both a diode and a memory element. The breakthrough device is just 2 nanometers thick and requires low drive voltage, opening up the possibility for ultra-high-density computing within our lifetime.
A new gallium oxide-based transistor can handle more than 8,000 volts, surpassing silicon and other mature technologies. This breakthrough could lead to smaller, more efficient electronic systems that improve the range of electric cars, locomotives, and airplanes.
Surface doping of organic semiconductors using two-dimensional molecular crystals has been shown to improve their electronic properties. The use of 1D/2D composite single crystals enables highly controllable doping at the monolayer precision, resulting in increased mobility and reduced threshold voltage. This approach holds great promi...
A new computational approach calculates the quasi-Fermi levels in molecular junctions, offering a better understanding of semiconductor devices at the nano-scale. This breakthrough could enable more accurate descriptions of underlying physics and improve the efficiency of nano-scale transistors.
A team of electrical engineers at KAUST has successfully made pure red LEDs from nitride crystals, paving the way for improved display technologies and efficient lighting. The breakthrough utilizes metalorganic vapor-phase deposition to add indium and aluminum to the crystal, reducing defects and increasing voltage efficiency.
Researchers at UMass Amherst have developed electronics that mimic the human brain's efficiency in learning by utilizing protein nanowires. The device operates extremely efficiently on low power and can create new connections similar to learning in a real brain.
Researchers at Tufts University developed a microfluidic chip that mimics hypoxic conditions following a heart attack, allowing for observation of cardiac cell behavior. The device provides information on the electrophysiological effects of ischemia and could be applied to future drug development.
Researchers at OIST Graduate University discovered that electrons can break Ohm's law when moving through a liquid medium, creating capillary waves and ripplopolarons. This behavior is crucial for understanding electron flow in fluids and has potential applications in quantum computing.
Researchers at Rice University have discovered that double-walled carbon nanotubes can create a staggered band alignment, allowing for more efficient separation of positive and negative charges in photovoltaic applications. This effect is caused by the interplay of different curvatures between the inner and outer walls of the nanotube.
Researchers at EPFL have created a nanoscale device that generates extremely high-power signals in just a few picoseconds, producing high-power THz waves. This technology has the potential to revolutionize security and medical imaging systems, as well as faster wireless communications.
The study reveals that zero-point vibrations can significantly reduce open-circuit voltage and efficiency in organic solar cells. By understanding the relationship between molecular properties and macroscopic device properties, researchers can develop novel materials to overcome these limitations.
Researchers have developed a high-speed microscope that can image the brain of an alert mouse 1,000 times a second, capturing millisecond electrical pulses through neurons. This technique allows neuroscientists to track sub-threshold inputs and identify transmission problems associated with disease.
A device that generates over 5 volts of electricity directly from the movement of a liquid droplet has been developed by researchers at Nagoya University. The device, made of flexible thin films, uses molybdenum disulfide as an active material to harness energy from liquid motion.
A University of Tsukuba-led research team created a thermocell with a material exhibiting temperature-induced phase transition, boosting output voltage from tens of millivolts to around 120 mV. This design enables efficient energy harvesting from waste heat to power small electronics sustainably.
Researchers developed a regioselective bay-functionalization method to synthesize PDI-based acceptor materials. This approach lifts the LUMO level, reducing energy offset for charge separation and non-radiative recombination loss in organic solar cells.