Articles tagged with Monolayers
Researchers developed a new method to improve the fabrication of self-assembled monolayers (SAMs) through blade coating, enabling large-scale manufacturing of high-efficiency perovskite solar cells. The approach enhances device reproducibility and stability by suppressing SAM aggregation.
Researchers at DGIST developed Laser-Assisted Microlens Array Processing to create precise defects in 2D semiconductors. This technology resulted in a 63-fold increase in on-current and 51-fold improvement in field-effect mobility, making it suitable for next-gen ultra-compact semiconductors.
Researchers have presented a new design paradigm for 2D flash memory devices using monolayer Janus MoSSe, achieving ultrafast charge trapping and superior retention. The device exhibits high-speed program/erase operations, stable data retention exceeding 10^8 seconds, and energy efficiency with reduced operating voltages.
Researchers observed a sequence of exotic magnetic phases in an ultrathin material, realizing a theoretical model of two-dimensional magnetism. The discovery may lead to new technologies by stabilizing magnetic vortices at nanoscale.
Study by Duke engineers reveals that a common device architecture used to test 2D transistors overstates their performance prospects up to sixfold. The back-gated architecture amplifies the transistor's performance using contact gating, but has physical limitations that prevent its use in commercial technologies.
Scientists at OIST use advanced spectroscopy to track the evolution of dark excitons, overcoming the fundamental challenge of accessing these elusive particles. The findings lay the foundation for dark valleytronics as a field, with potential applications in quantum information technologies.
Researchers at Kumamoto University have developed a flexible solid electrolyte material with exceptional proton conductivity and hydrogen gas barrier properties, making it suitable for low- to mid-temperature fuel cells. The material enables stable operation across a wide temperature range, from -10 °C to 140 °C, and shows promise for ...
Researchers from USTC synthesize monolayer WS2 lateral homojunctions with tailored defect architectures, enabling controllable direct chemical vapor deposition growth. The structures exhibit distinct field-effect characteristics and demonstrate rail-to-rail operation in logic inverters.
Researchers developed a hybrid-interlocked self-assembled monolayer strategy to enhance device stability in perovskite indoor photovoltaics. The optimized devices achieved record indoor power conversion efficiency of 42.01% and projected T90 lifetime approaching 6000 hours.
Researchers have developed three-dimensional spheroid cultures that better replicate cell-cell interactions and nutrient gradients, leading to a greater understanding of tumour tissue behaviour and drug responses. The study highlights the importance of mimicking tumour architecture in testing cancer therapies.
Scientists at the University of Rochester have discovered a way to create artificial atoms within twisted monolayers of molybdenum diselenide, retaining information when activated by light. This breakthrough could lead to new types of quantum devices, such as memory or nodes in a quantum network.
The newly synthesized monolayer Ti3C2Tx transforms photocatalytic bioaerosol disinfection at the catalyst-cell interface. The material achieves a sterilization efficiency of 3.3 log in just 12.8 seconds, far exceeding traditional TiO2.
Researchers at Rice University have created a new 2D carbon material that is eight times tougher than graphene, according to a recent study. The material, known as monolayer amorphous carbon (MAC), incorporates both crystalline and amorphous regions, giving it unique toughness.
Scientists at Lund University and Hokkaido University have successfully synthesized 2D gold monolayers with remarkable thermal stability and potential catalytic utility. The team used a novel bottom-up approach combined with high-performance computations to create macroscopically large gold monolayers with unique nanostructured patterns.
A NRL multi-disciplinary team developed a nonvolatile and reversible procedure to control single photon emission purity in monolayer tungsten disulfide by integrating it with a ferroelectric material. This novel heterostructure introduces a new paradigm for control of quantum emitters.
Researchers from Kaunas University of Technology have developed a new technology for perovskite solar cells using self-assembling monolayers. This innovation increases the efficiency of solar cells by allowing only one type of charge to pass through, similar to an automatic gate on the subway.
Researchers at Gwangju Institute of Science and Technology develop a new nanotechnology method that enables the creation of uniform, wafer-scale nanoparticle assemblies in just seconds. The 'mussel-inspired' technique accelerates assembly by introducing excess protons to increase electrostatic attraction.
A new atomically-thin material has been discovered that can switch between an insulating and conducting state by controlling the number of electrons. This property makes it a promising candidate for use in electronic devices such as transistors.
Researchers at Linköping University have developed a method to synthesize hundreds of new 2D materials, expanding the possibilities for energy storage, catalysis, and water purification. The study uses a three-step process, including large-scale computations and chemical exfoliation, to identify and create suitable materials.
Researchers have developed a novel 'nano active control platform' to control excitons and trions, providing valuable insights into the optical properties of two-dimensional semiconductors. The breakthrough discovery enables real-time analysis of nano-light properties with exceptional spatial resolution.
A research team developed a new mechanism to make water droplets slip off surfaces, creating the slipperiest liquid surface in the world. The discovery challenges existing ideas about friction between solid surfaces and water, opening up new avenues for studying droplet slipperiness.
The CityU innovation has dramatically enhanced the thermal robustness of perovskite solar cells, retaining over 90% of efficiency even under high temperatures. This breakthrough could significantly broaden the utilisation of these cells and contribute substantially to combating the global climate crisis.
Scientists have successfully fabricated centimeter-scale transition metal dichalcogenide field-effect transistors with low ohmic contact resistance close to the quantum limit. The devices exhibited an ultrahigh current on/off ratio of ~10^11 at 15 K, outperforming previous values.
A recent publication in Science reports on improvements in silicon-perovskite tandem cells, achieving a record-breaking 32.5% efficiency. The development of these high-efficiency solar cells was led by Lithuanian researchers from Kaunas University of Technology.
Researchers have discovered Rydberg moiré excitons in WSe2 monolayer semiconductor adjacent to graphene, exhibiting multiple energy splittings and a pronounced red shift. The discovery holds promise for applications in sensing and quantum optics due to the strong interactions with the surroundings.
Researchers at Nagoya University have developed a new technology to fabricate high-quality nanosheet films in about one minute. The method uses an automated film-forming process that produces neatly tiled monolayer films with no gaps between the nanosheets.
Biofilm-forming bacteria adhere to hydrophobic and hydrophilic protein-adsorbing SAMs firmly, while weakly attaching to hydrophilic protein-resisting SAMs. This study could lead to development of bacteria-resistant surfaces and antibiofouling coatings.
Researchers from City University of Hong Kong and NREL developed a one-step solution-coating approach to simplify PSC manufacturing, resulting in high efficiency and stability. The new method reduces process complexity and cost, bringing PSCs closer to commercialization.
Researchers have discovered a novel form of ferroelectricity in a single-element bismuth monolayer that can produce regular and reversible dipole moments. This breakthrough expands the scope for non-volatile memories and electronic sensors.
Researchers have developed a new simulation method to study polarons in 2D materials, which could lead to breakthroughs in OLED TVs and hydrogen fuel production. The study uses quantum mechanical theory and computation to determine the fundamental properties of polarons in 2D materials.
Researchers have pushed single-atom vibrational spectroscopy to the level of chemical bonds, enabling precise measurements of point defects in graphene. The study found unique vibrational modes for two types of silicon point defects, with stronger signals for one defect configuration.
Researchers have successfully developed chemically stable, tunable-bandgap 2D nanosheets from perovskite oxynitrides, opening new possibilities for sustainable technologies such as photocatalysis, electrocatalysts, and electronics. The nanosheets exhibit superior proton conductivity and excellent photocatalytic activity.
The study reveals the formation of boron clusters with magic numbers on monolayer borophene, leading to spontaneous transformation into bilayer borophene. Density functional theory calculations identify B5 clusters as the result of in-plane charge distribution and electron delocalization.
Scientists have directly observed ultrafast motion of nonequilibrium excitons in monolayers WSe2, MoWSe2, and MoSe2, traveling at least 200 nm within 1 ps. This 'superdiffusion' process could break the traditional limitation of photovoltaic efficiency and be used for ultrafast electronic devices.
Researchers have developed novel organometallic molecular junctions that exhibit unprecedented thermoelectric performance, achieving a Seebeck coefficient of 73 μV/K. These results are promising for the development of nanoscale semiconductors and efficient thermoregulation.
Researchers at Penn State have created a two-dimensional heterostructure by combining a topological insulator with a monolayer superconductor, demonstrating topological superconductivity and Ising-type superconductivity. The hybrid structure could pave the way for more stable quantum computers and explore Majorana fermions.
Researchers have controlled a one-dimensional electron fluid to an unprecedented degree, discovering new properties of Tomonaga-Luttinger liquids in two-dimensional materials. The team's findings could pave the way for more robust quantum computers with enhanced fault-tolerance.
Scientists at Swinburne University of Technology and FLEET collaborators observe and explain signatures of Fermi polaron interactions in atomically-thin WS2 using ultrafast spectroscopy. Repulsive forces arise from phase-space filling, while attractive forces lead to cooperatively bound exciton-exciton-electron states.
Scientists have developed a magnetized state in monolayer tungsten ditelluride, allowing for controlled electron flow and potential applications in non-volatile memory chips. The discovery enables the creation of smaller, more energy-efficient devices that consume less power and dissipate less energy.
Researchers have demonstrated that hydrogen condenses on a surface at low temperatures, forming a super-dense monolayer with a volume of just 5 liters per kilogram H2. This breakthrough could enable more efficient cryogenic hydrogen storage systems for the coming hydrogen economy.
Scientists develop a method to produce atomically thin seams of light using in-plane heterostructures, enabling customizable strain and circularly polarized light. This technology has the potential to create efficient and chiral electroluminescence for applications in quantum optoelectronics.
Brazilian researchers used computer simulations to investigate the superconducting behavior of a dimolybdenum nitride monolayer, finding that it became superconductive at relatively high temperatures and showed strong correlation with strain applied.
Researchers propose a dual bound states in the continuum scheme to boost SHG efficiency from TMDs monolayers, amplifying the signal by four orders of magnitude and up to seven orders with patterning.
Researchers from Kumamoto University create nanocavities using ovalene molecules on gold electrodes, trapping a single thiol molecule. This breakthrough enables precise molecular design for future electronic devices and sensors.
Researchers at the University of Rochester have created an automated scanning device that detects monolayers with high accuracy, reducing processing time and costs. The system utilizes AI-powered image processing to analyze images of materials, identifying monolayers with near 100% accuracy in just nine minutes.
Researchers have developed a novel method called 'dative epitaxy' for growing thin layers of crystals made from different materials on top of each other. This technique allows for the formation of special chemical bonds to fix crystal orientation, overcoming limitations of conventional and van der Waals epitaxial techniques.
A research team from City University of Hong Kong has developed an efficient electrochemical intercalation method to produce high-yield mono- or few-layer transition metal dichalcogenide (TMD) nanosheets. The new strategy offers a higher degree of control over lithium insertion and can be scaled up for industrial applications.
A team of University of Minnesota researchers has discovered the molecular properties of lung surfactants, which could lead to improved treatments for respiratory illnesses such as pneumonia and COVID-19. The study found that synthetic lung coatings can help premature infants and adults with respiratory problems breathe easier.
Researchers successfully grow high-quality single-crystal graphene sheets on insulating supports using a copper-catalyzed decomposition method. The resulting graphene exhibits excellent electronic performance due to its high crystallinity and minimal surface folds.
Researchers at NGI demonstrate improved spin transport characteristics in nanoscale graphene-based electronic devices, achieving up to 130,000cm²/Vs mobility. The study also reveals spin diffusion lengths approaching 20μm, comparable to the best graphene spintronic devices demonstrated to date.
Researchers develop a new method for characterizing thermal transport properties at the nanoscale, enabling visualization of temperature distribution and molecular interactions. This breakthrough paves the way for advanced nanodevices and deeper understanding of materials.
Researchers develop new epitaxial growth mechanism to achieve large-scale single-crystal WS2 monolayers, overcoming a crucial hurdle in replacing silicon with 2D materials. The technique enables uniform alignment of small crystals and leads to the successful growth of wafer-scale single-crystals of WS2, MoS2, WSe2, and MoSe2.
A RMIT-led collaboration demonstrates large in-plane anisotropic magnetoresistance (AMR) in monolayer WTe2, a quantum spin Hall insulator. The team successfully fabricates devices and observes typical transport behaviors, showing promise for future low-energy electronics.
Researchers from Germany and Spain successfully create a uniform two-dimensional material with exotic ferromagnetic behavior known as easy-plane magnetism. This discovery opens up new possibilities for spintronics, a technology that uses magnetic moments instead of electrical charges.
Researchers investigate crystal-orientation dependence of HHG in WS2 and MoSe2, revealing polarization direction of odd-order harmonics follows the driving laser field. Crystal symmetry flips affect high-harmonic signals.
Researchers found that tuning the interface and twist angle of layered 2D materials enhances key properties, leading to stronger interlayer coupling and improved electronic and optical device performance. This discovery has great importance for various applications in optoelectronics, electronics, batteries, lighting, and appliances.
A new study proves that ultra-short pulses of light can drive transitions to new phases of matter in tungsten disulfide (WS2) atoms, aiding the search for future low-energy electronics. The findings show that even ultrashort pulses are as effective in triggering state changes as continuous illumination.
Berkeley Lab researchers developed a method to increase the efficiency of LED devices by applying mechanical strain to thin semiconductor films. This approach reduces exciton annihilation, allowing for high-performance LEDs even at high brightness levels.
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 a new method to realize Majorana zero modes in monolayer Fe(Te,Se) using an in-plane magnetic field and electric gating. The study demonstrates that the material is a promising platform for topological quantum computation with scalability and electrical tunability.