Articles tagged with Charge Transfer
Researchers have discovered two distinct redox reactions in MXene flakes depending on the electrolyte, providing insights into charge transfer processes at the nanoscale. This finding lays the groundwork for optimizing pseudocapacitive energy storage devices with high storage capacity and speed.
Scientists have detected the faint signals of electrons in organic materials, revealing new insights into the physics of photodegradation and long-term photoemission processes. By reimagining conventional spectroscopy setups, researchers have captured the exact mechanisms of weak charge accumulation, providing direct evidence for multi...
Researchers at the University of Warwick and National Research Council of Canada have created a new quantum material with unprecedented electrical conductivity, enabling faster and more efficient electronics. The breakthrough could lead to applications in quantum information processing, AI, and data-center hardware.
Researchers at ISTA use laser tweezers to capture and charge micron-sized particles, allowing them to observe charging and discharging dynamics over time. This method may provide key insights into what sparks lightning.
A South Korean research team has discovered a molecular-level mechanism to switch the charge polarity of organic polymer semiconductors by adjusting the concentration of a single dopant. This enables polymers to exhibit both p-type and n-type characteristics, eliminating the need for separate materials or complex device architectures.
Researchers at Yale University have measured the movement of protons through electrically charged water on a microscopic scale for the first time. The study provides well-defined parameters for chemical simulations, which can inform theorists about water-mediated proton transfer.
Bacteria breathe deep underground without oxygen using nanowires to dispose of excess electrons. Yale scientists found that electrons move rapidly through the wires via a wave-like behavior rather than hopping, defying classical Newtonian laws. This discovery has significant implications for quantum sensing and computation.
Researchers found that indene-C60 diadduct (ICBA) suppresses charge recombination and improves open-circuit voltage in tin-based perovskite solar cells. This enhancement is attributed to the effective suppression of band bending at the interface between the tin-based perovskite and the electron transport layer.
Researchers developed a capacitive micromachined ultrasonic transducer (CMUT) device that can operate in a constant-charge mode without external bias. The system delivers stable power for over two years, setting new records for ultrasonic wireless power in biomedical applications.
Scientists have developed a novel CT-ICT system that utilizes a pyrazinacene derivative to facilitate reversible color-changing properties. The system, which co-crystallizes with naphthalene, demonstrates a dramatic color shift from greenish-blue to red-violet.
Recent advancements in compensation circuits have achieved impressive results in addressing key inefficiencies in wireless EV charging. Researchers refined converter topologies to deliver high-power, high-efficiency charging without physical connectors, demonstrating improved power transfer.
A recent study from Dalian Institute of Chemical Physics measures surface charges in liquid environments, revealing an additional driving force that pulls photogenerated electrons to the surface. The researchers also found that local surface potential varies with pH and identified an optimal pH range for efficient charge transfer.
A novel artificial solid electrolyte interface based on non-coordinating charge transfer significantly improves the stability of aqueous zinc metal batteries. This design enhances cycle life, reduces side reactions, and promotes uniform zinc deposition, leading to improved battery performance.
Researchers have successfully imitated one of the first steps of natural photosynthesis by creating a stack of dyes that absorbs light energy and transfers charge carriers. This breakthrough has significant implications for artificial photosynthesis, which could potentially produce hydrogen and remove carbon dioxide from the atmosphere.
Researchers created a high-performance p-n junction using atomic-level Pt-doped CeO2 and 2D metalloporphyrins nanosheets, significantly boosting charge transfer efficiency. The study achieved a 2.5-fold enhancement in photoelectric performance compared to the conventional system.
Physicists from ISTA reveal that the contact history of materials determines how they exchange charge, explaining the unpredictability of contact electrification. By analyzing identical materials, they discovered a triboelectric series and found that repeated contact allows samples to evolve and order correctly.
Tin-based perovskite solar cells improve efficiency and durability when large organic cations form a two-dimensional structure, creating an energy barrier that suppresses electron backflow. This structure enhances device performance under sunlight irradiation.
Researchers at KAIST introduced a new hybrid device structure with organic photo-semiconductors that expand the absorption range to near-infrared, improving power conversion efficiency. The device achieved a high internal quantum efficiency of 78% in the near-infrared region and improved stability for over 1,200 hours.
A new hole-transport material facilitates charge transfer and demonstrates high charge mobility in perovskite solar cells. However, the devices show reduced current due to an energetic barrier at the perovskite/HND-2NOMe interface, hindering performance.
Scientists from Osaka University create borane molecules that exhibit red-shifted light emission upon binding to fluoride, enabling versatile materials for electronic display and chemical sensing applications. The researchers also achieve fine-tuning of the color of light emission by adjusting the quantity of added fluoride.
Researchers visualize chiral interface state at atomic scale for the first time, allowing on-demand creation of conducting channels. The technique has promise for building tunable networks of electron channels and advancing quantum computing.
Researchers at the University of Gothenburg discovered how proteins deform to create efficient transport routes for electrons, powered by solar energy. This finding could lead to more efficient solar cells and batteries.
Scientists use a special microscope to break up the bond between electrons and holes in semiconductors, revealing that hole interactions determine charge transfer processes. The findings have implications for future computer and photovoltaic technologies.
Researchers propose a new method using titanium dioxide as a photocatalyst for synthesizing thiochromenopyrroledione derivatives in blue light. The approach yielded 20 sulfur-containing heterocyclic compounds with moderate-to-high yield.
A new strategy has been developed to enhance photocatalytic water oxidation by introducing a charge-transfer mediator. The mediator, partially oxidized graphene, reduces charge recombination and prolongs the lifetime of photogenerated charges.
Brazilian researchers used a high-speed camera to capture an image of lightning rods trying to connect to nearby buildings, revealing details of the connections. The image shows that even with multiple lightning rods in place, the strike connected to a smokestack on top of one building, highlighting the importance of proper installation.
A team of Japanese researchers has developed a novel approach to enhance the fast-charging ability of lithium-ion batteries using a binder material that promotes Li-ion intercalation of active material. This results in high conductivity, low impedance, and good stability, reducing the concentration polarization of Li+ ions.
Researchers used machine learning to create molecule chains that display designated colors in response to different stimuli, such as light, chemicals, and energy. This breakthrough enables faster and more efficient data storage and security applications.
ETH Zurich researchers have created a range of affordable fluorescent inks with machine learning algorithms to determine the right molecular subunits. The new dyes can be used for security features and applications like solar power plants and organic light-emitting diodes.
Researchers at Monash University found that electric fields and applied strain can turn magnetism on and off in two-dimensional metal-organic frameworks. This discovery could lead to applications in magnetic memory, spintronics, and quantum computing.
A new wireless laser charging system uses infrared light to transfer high levels of power over distances of up to 30 meters, sufficient for charging sensors. The system automatically shifts to a safe low power delivery mode if an object or person blocks the line of sight, achieving hazard-free power delivery in free space.
Scientists have analyzed the interaction between highly charged ions and graphene at a femtosecond scale, revealing complex processes involved in material response. The study provides fundamental new insights into how matter reacts to short and intense radiation exposure.
Researchers at Gwangju Institute of Science and Technology improve triboelectric nanogenerators by using mesoporous carbon spheres to enhance charge transport and surface charge densities. The device achieves a 1300-fold higher output current, enabling potential sustainable energy harvesting.
Researchers developed Flu-TCNQ cocrystal with integrated red emission and n-type charge transport properties. This innovative strategy enables the design of multifunctional materials with improved optoelectronic performance. The study provides an effective solution to overcome the challenges of organic material shortages.
Researchers developed a bumpy carbon-based material that maintains rechargeable storage capacity down to -31 F, improving lithium-ion batteries' performance in freezing temperatures. The new material enables electric cars to drive longer and reduces the risk of battery failure in extreme cold.
Researchers at Duke University have discovered paddlewheel-like molecular dynamics that help push sodium ions through a quickly evolving class of solid-state batteries. The insights will guide researchers in their pursuit of a new generation of sodium-ion batteries to replace lithium-ion technology.
Researchers at Japan Advanced Institute of Science and Technology developed a graphene sensor that detects electric fields with improved efficiency and reduced size. The mechanism involves the transfer of charges between graphene and traps, allowing for the detection of field polarity and magnitude.
A SUTD-led study develops brighter, more sensitive fluorophores by suppressing twisted intramolecular charge transfer (TICT) and enhancing photon-induced electron transfer (PET). The research provides design guidelines for dye chemists to rationally tune TICT, PET, and other mechanisms for a wide range of applications.
A new process has been identified to accelerate the use of low-cost materials, transforming the energy sector with potential to replace silicone-based solar panels. The dynamic dimeric copper complexes offer a novel combination of fast charge transport and efficient redox mechanisms.
Researchers at GIST have made a breakthrough in creating a perovskite material with easily tunable electrical properties. The study used ambient pressure X-ray photoelectron spectroscopy and low energy electron diffraction to investigate the effects of fabrication conditions on the material's surface.
Researchers at Dalian Institute of Chemical Physics observed the Marcus inverted region in charge transfer from low-dimensional semiconductor materials. This finding reveals a new understanding of the fundamental energetics dependence of electron transfer, benefiting energy conversion applications of these materials.
Researchers at HZB developed a method to quantify charge extraction at buried interfaces in perovskite solar cells. Time-resolved surface photovoltage technique facilitates design of ideal charge-selective contacts and improves efficiency.
Researchers propose an OV-engineering strategy to realize high-content anion doping in TiO2, enhancing charge transfer kinetics and sodium-ion storage performance. The optimized A-TiO2-x-S/C anode exhibits high-rate capability and ultrahigh energy density.
A SLAC X-ray laser study reveals the molecular structure changes during charge transfer in N,N'-dimethylpiperazine (DMP) gas molecules. The research team observed how the molecule's atomic scaffolding deforms and redistributes charges, leading to a lopsided response to light.
Scientists have created a new type of salt that acts as an electrical conductor, exhibiting unique magnetic coordination at low temperatures. The discovery was made using tetrathiafulvalene as a skeleton for the new substance, which has infinite chain structure and stabilizes atomic arrangements.
Research reveals that the surface site and corresponding adsorbed methanol species determine the interfacial charge transfer process and photocatalytic efficiency in anatase TiO2 nanocrystals. Surface structure engineering of photocatalysts is proposed as a method to maximize efficiencies.
Physicists at Washington University discovered a method to add electrical charge to graphene devices by layering alpha-RuCl3 flakes. This process allows for 'permanent' charge transfers without external electric fields, enabling control over the flow of electrical current.
Researchers at ITMO University have developed a metasurface that enables simultaneous power transfer at various frequencies, allowing users to charge devices from different manufacturers with different power transfer standards.
Researchers at Graz University of Technology used machine-learning-based methods to simulate interface properties of hybrid materials. They found that molecules in the system change their structure rather than undergoing long-range charge transfer, refuting earlier theories.
Researchers observe exotic heavy N+ ion transfer channel in a charged Van der Waals cluster, leading to novel scenarios such as NAr+ formation. The study sheds light on microdynamics of biological systems and potential importance in understanding cancer therapy by heavy ion irradiation.
Researchers at OIST Graduate University have developed a simplified approach for studying charge transfer in catalysis, using a tiny ruthenium catalyst and real-time detection. This method provides a complete picture of the reaction mechanics and has potential applications in industrial processes such as solar energy devices.
Researchers at Zhejiang University have discovered a new iron-based superconductor with double FeAs layers, which is stabilized by inter-block charge transfer. The newly found superconductor, BaTh2Fe4As4(N0.7O0.3)2, exhibits contrasting structural and physical properties compared to previous hole-doped IBSCs.
Scientists have developed a new charge transfer and separation process called Twisted Intramolecular Charge Shuttle (TICS) that enables faster energy conversion in solar cells and photosynthesis. TICS molecules exhibit a bidirectional, role switching phenomenon, paving a new avenue for chemists to construct unique fluorescent probes.
Researchers at UNIST have developed a new generation of solar cells using lead-free perovskites, showcasing enhanced efficiency and stability. The study demonstrates that the surface state of Cs2SnI6 is highly redox active, facilitating charge transfer through it.
Researchers from the Institute of Atmospheric Physics in China used a long-baseline lightning location network to track more than 30 red sprites. The study found that most sprite-producing cloud-to-ground strokes occurred during the mature stage of an asymmetric mesoscale convective system, with locations typically within 10 km.
Researchers used scanning photocurrent microscopy to study atomically thin nanomaterials exposed to light, revealing the processes affecting electrical current generation. The study suggests that charge transfer is beneficial for photodetection while energy transfer is preferred for photovoltaic applications.
Engineers at the University of Arizona have developed a new method to control charge transfer rate from an organic polymer to a biomarker molecule, advancing the field of organic bioelectronics. Their findings show that electron transfer rate depends directly on applied voltage and demonstrate Marcus' theory of inverted charge transfer.
Engineers at Duke University and the University of Washington propose a flat-screen wireless charging system using metamaterials. The technology can charge devices within a room, eliminating cord hassles and power shortages.
Scientists have discovered a new approach to tailor interface properties of metal oxide sandwiches, allowing for the control of ferromagnetism and superconductivity. The team found that the charge transfer between materials strongly depends on the rare earth element used, enabling the manipulation of interfacial phases.
Scientists from ITMO University developed a novel WPT system that maintains up to 80% transfer efficiency across 20 centimeters, making it suitable for commercial applications. The system uses spherical dielectric resonators and a higher-order resonant frequency mode to reduce power losses.