Articles tagged with Heterostructures
Researchers from Kumamoto University and partners discovered a method to enhance titanium alloys using high-density pulsed electric current, achieving improved strength and toughness. The technique harnesses an electron wind force to reorganize the internal crystal structure, producing nanoscale martensitic phases that disperse stress ...
Researchers at Tohoku University have made significant progress in precise nanoscale construction of g-C₃N₄ catalysts, which enables efficient photocatalytic H₂O₂ evolution. The study highlights the importance of nanoarchitectonics in scaling up industrial production.
Graphene and diamond hybrids show promising performance in electronic devices, sensors, and machining tests. However, major challenges remain, including producing large-area hybrids with consistent quality and understanding fundamental properties.
Researchers created a powerful catalyst from renewable lignin waste, boosting the efficiency and stability of oxygen evolution reaction in water electrolysis. The new catalyst achieves a low overpotential of 250 mV at 10 mA cm² and maintains strong performance for over 50 hours.
Researchers at SUTD have discovered that applying pressure can transform angstrom-thin bismuth into a metallic material, eliminating its energy band gap and allowing electrons to move freely. This discovery enables the creation of layer-selective Ohmic contact, which allows electrical current to be steered between layers on demand.
Researchers at King Abdullah University of Science and Technology have achieved a new benchmark in integration density and efficiency by stacking six semiconductor transistors. This feat enables larger area electronics while maintaining performance, opening possibilities for flexible electronics and the Internet of Things.
Researchers are making progress in overcoming technical hurdles to create layered structures, continuous gradients, and fully three-dimensional architectures with programmable material variation. Optimized laser parameters and build sequences can enhance strength, control heat flow, and improve energy absorption.
Researchers from Osaka University have developed a new technology to lower power consumption for modern memory devices, enabling an electric-field-based writing scheme. The proposed technology could provide an alternative to traditional RAM and is a promising step towards implementing practical magnetoelectric (ME)-MRAM devices.
Researchers have developed a novel photocatalyst by combining g-C3N4 with Bi4O5Br2 and graphene, resulting in efficient degradation of pollutants. The CN/BOB-16 heterostructure exhibited superior performance, surpassing existing benchmarks, and confirmed the key role of Z-type heterojunctions in generating active species.
UCSB researchers used scanning ultrafast electron techniques to visualize fleeting electric charges in semiconductor materials. The study provides direct visual evidence of charge transfer across the interface, shedding light on the behavior of hot photocarriers and their impact on device performance.
A Spanish-German team has shown that the ferromagnetic element cobalt significantly enhances spin textures in graphene-iridium hybrids. The samples were grown on insulating substrates, which is a necessary prerequisite for multifunctional spintronic devices exploiting these effects.
Researchers developed a new superconductor material that uses a delocalized state of an electron to carry quantum information. The material could be used to create low-loss microwave resonators for quantum computing, which is critical for reducing decoherence and increasing the stability of qubits.
Researchers at NUS developed a new method to grow two-dimensional transition metal dichalcogenides (TMDs) using molecular beam epitaxy. This approach enables phase engineering and fabricating 2D heterostructure devices with precise control over their properties.
Researchers at Washington University in St. Louis have developed a novel 2D/3D/2D heterostructure material that can minimize energy loss while preserving ferroelectric material properties. The new structure achieved an energy density up to 19 times higher than commercially available capacitors and efficiency over 90%.
A team of researchers from Tokyo University of Science employed a new 'transmetallation' technique to synthesize lateral heterojunctions of 2D coordination nanosheets. The method enables the creation of ultrathin electronic devices with unique properties, paving the way for innovative devices.
The team created an ultraclean transfer process using a hybrid stamp, resulting in atomically clean interfaces and minimal strain. This breakthrough enables the commercialization of 2D material-based electronic devices with novel hybrid properties.
Researchers found that changing the stacking order of layers in transition metal dichalcogenide (TMD) semiconductors creates new optoelectronic devices with tailor-made properties. The study reveals dark excitons exclusively located in the top layer, which can be utilized for optical power switches in solar panels.
Scientists have discovered a method for maintaining valley polarization at room temperature using transition metal dichalcogenides (TMDs) and chiral lead halide perovskites. This breakthrough could lead to the development of devices that store and process information in novel ways without the need for ultra-low temperatures.
Scientists have demonstrated techniques to fabricate layered semiconductors with suitable bandgap and band structure, offering a new class of materials in photoelectronic applications. Heterogeneous integration of TMDs and traditional semiconductors enables the exploration of next-generation electronic and optoelectronic devices.
A KAUST-led team has developed a proton-mediated approach that produces multiple phase transitions in ferroelectric materials, potentially leading to high-performance memory devices. The method enables the creation of multilevel memory devices with substantial storage capacity, operating below 0.4 volts.
Researchers have developed a method to create Nb2C/MoS2 heterostructures with improved optical properties, showcasing strong nonlinear optical absorption characteristics. The study demonstrates the potential of MXenes in optoelectronics, particularly in broadband optoelectronic devices and optical modulators.
Scientists have successfully engineered multi-layered nanostructures of transition metal dichalcogenides to form junctions, enabling the creation of tunnel field-effect transistors (TFETs) with ultra-low power consumption. The method is scalable over large areas, making it suitable for implementation in modern electronics.
Ho Nyung Lee, a condensed matter physicist at ORNL, has been elected a Fellow of the Materials Research Society for his distinguished accomplishments in advancing materials research. He is recognized for his leadership and service to the community, particularly in precision synthesis and complex oxide thin films.
Researchers predict that layered electronic 2D semiconductors can host a quantum phase of matter called the supersolid. A solid becomes 'super' when its quantum properties match those of superconductors, simultaneously having two orders: solid and super. The study reports the complete phase diagram of this system at low temperatures.
Researchers at The University of Tokyo have developed a programmable gate driver for solid-state electronic transistor switches, reducing switching loss under changing input current and temperature fluctuations. The device includes automatic timing control, allowing for single-chip integration and real-time control.
Researchers at Purdue University have developed heterostructures that support the prediction of counterpropagating charged edge modes at the v=2/3 fractional quantum Hall state. The team's experiment measured an electrical conductance equal to half the fundamental value of e^2/h, consistent with theoretical predictions.
Researchers discuss the construction, properties, and applications of 2D/quasi-2D perovskite-based heterostructures. These heterostructures offer novel functionalities for photovoltaic solar cells, LEDs, and photodetectors.
Researchers have developed a novel substrate boosting square-tensile-strain, promoting four-variant spontaneous polarization and defect-dipoles. This breakthrough enables reversibly controlled ternary polar states and ferroelectric bias.
Researchers have discovered emergent interfacial ferromagnetism in 2D antiferromagnet heterostructures, showing enhanced electric-field tunability. This breakthrough has exciting implications for exploring exotic magnetic phases and engineering novel spintronic devices.
USTC scientists made a significant breakthrough in ab initio computing simulation of complex metallic heterostructures with 2.5 million atoms. This achievement is expected to be applied in the construction of 2D-materials-based transistors.
Researchers at the University of Illinois Chicago synthesized semiconductor quantum dots with extended radiative lifetimes and spatially localized electrons, enabling new applications in optics and time-gated single-particle imaging. The study's findings hold promise for energy-efficient displays and biomedical research.
Researchers from City University of Hong Kong developed a new ultra-stable hydrogen evolution reaction electrocatalyst based on two-dimensional mineral gel nanosheets. The catalyst exhibits excellent electrocatalytic activity and long-term durability, with an overpotential of only 38.5 mV at 10 mA cm−2.
Researchers from Chinese Academy of Sciences reveal the secret of ultra-slow motion in pine cones, attributing it to unique microtube structures that drive scale movement with humidity changes. They develop mimicking actuators enabling unperceivable motion, two orders of magnitude slower than other reported actuators.
Researchers have discovered a way to modulate the band-edge states and charge distribution of 2D halide perovskites using external pressure, enabling controllable emission properties. This breakthrough has significant implications for the design and production of high-performance electronic devices.
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.
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.
Researchers have made significant progress in perovskite-transition metal dichalcogenides heterostructures, offering tunable optical and electronic properties. These materials show great potential for high-performance optoelectronic devices, including photodetectors and solar cells.
The study observes electric gate-controlled exchange-bias effect in van der Waals heterostructures, enabling scalable energy-efficient spin-orbit logic. The team successfully tunes the blocking temperature of the EB effect via an electric gate, allowing for the EB field to be turned 'ON' and 'OFF'.
Scientists at Max Born Institute create novel method to probe magnetic thin film systems, identifying heat injection from platinum layer as cause of magnetization changes. The approach allows femtosecond temporal and nanometer spatial resolution, paving way for studying ultrafast magnetism and device-relevant geometries.
Researchers developed a thin-layer version of barium titanate, enabling faster switching and lower voltages for next-gen memory and logic devices. The findings could pave the way for more sustainable computing power with reduced energy consumption.
Scientists at Chung-Ang University have created a new catalyst that can efficiently generate hydrogen from water without the need for expensive noble metals. The innovative heterostructured material boosts both the half-reactions, improving its overall performance and paving the way for large-scale industrial applications.
Researchers at Osaka University and National Research Council Canada create a gallium arsenide quantum dot that can trap individual electrons. The development could help advance the field of quantum networks by efficiently converting photons into electron spins.
Researchers create a quantum anomalous Hall insulator by stacking a ferromagnetic material between two 2D topological insulators, enabling room-temperature lossless transport. The new architecture could lead to ultra-low energy future electronics or topological photovoltaics.
Researchers developed a universal method to fabricate van der Waals heterostructures into nano-opto-electro-mechanical systems. The team demonstrated various functionalities, including nano-mechanical resonators, vacuum channel diodes, and ultra-fast thermo-radiators.
A team of researchers at NGI and NPL demonstrated that slightly twisted 2D transition metal dichalcogenides (TMDs) display room-temperature ferroelectricity. This characteristic can be used to build multi-functional optoelectronic devices with built-in memory functions on a nanometre length scale.
Researchers have developed a novel approach to detect non-uniformities in 2D materials, enabling the creation of new medical sensors that can detect cancer treatment drugs like doxorubicin. The sensor material combines multiple signals from graphene and molybdenum disulfide to accurately measure analyte concentration.
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 developed a new method to significantly enhance thermoelectric voltage at low temperatures by creating laminate structures with transition metal oxide and insulating layers. The 'phonon-drag effect' is responsible for the enhancement, where flowing phonons drive electrons to produce extra thermoelectric voltage.
Scientists at Argonne National Laboratory have discovered a method to remove heterostructure thin films containing electrical bubbles from a substrate while keeping them fully intact. This breakthrough may bring new applications in microelectronics and energy storage devices.
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 developed a novel spintronic-metasurface terahertz emitter that generates broadband, circularly polarized, and coherent terahertz waves. The design offers flexible manipulation of the polarization state and helicity with magnetic fields, enabling efficient generation and control of chiral terahertz waves.
The study introduces a versatile method to tune the interaction strength in 2D heterostructures by applying electrical fields. This allows for the exploration of wide parameter ranges and opens up new perspectives for quantum simulation.
MnBi2Te4's unique properties make it suitable for ultra-low-energy electronics and observing exotic topological phenomena. The material is metallic along its one-dimensional edges while electrically insulating in its interior.
Researchers have developed a novel gas sensor using SnS2/black phosphorus heterostructure that can detect trace levels of NO2 as low as 100 ppb at room temperature. The sensor achieves high response, fast response/recovery, and good stability due to Lewis acidity suppression.
Researchers explore joining topological insulators with magnetic materials to achieve quantum anomalous Hall effect, promising building blocks for low-power electronics. The 'cocktail' approach allows tuning of both magnetism and topology in individual materials, enabling operation closer to room temperature.
Researchers at C-Crete Technologies have developed a method that utilizes deep learning to quickly predict and design novel hybrid organic-inorganic materials, offering improved materials design for various industries. By feeding quantum mechanics calculations to layered machine learning based on artificial neural networks, they can un...
A novel graphene nanoribbon sensor has been developed to detect atoms and molecules, utilizing the quantum mechanical tunnelling effect. The sensor's sensitivity is particularly strong when adsorbates accumulate on its surface.
Scientists create a 2D/3D hybrid perovskite heterostructure crystal, achieving high polarization sensitivity in photodetection. The device surpasses reported perovskite-based devices and is competitive with conventional inorganic heterostructure-based photodetectors.
Research on interlayer excitons in TMDs vdW heterostructures reveals ultrafast formation, long population recombination lifetimes, and intriguing spin-valley dynamics. The properties ensure good transport characteristics and pave the way for potential applications in efficient excitonic devices.
Researchers have created a new type of 2D material, called a van der Waals heterostructure, which can be rolled up into a thin cylinder. This unique structure holds promise for miniaturized electronics, such as diodes and other devices. The discovery was made by a team of Penn State and University of Tokyo researchers.