NUS researchers develop a novel strategy for growing two-dimensional transition metal dichalcogenides

This approach provides a promising method for phase engineering of 2D TMDs and fabricating 2D heterostructure devices

30-May-2024 - Two-dimensional transition metal dichalcogenides (2D TMDs) exhibit various polymorphic structures, including 2H (trigonal prismatic), 1T (octahedral), 1T′ and Td phases. These phases confer a range of properties such as superconductivity, ferroelectricity and ferromagnetism. By manipulating these ...

Graphene research: numerous products, no acute dangers

Successful completion of the EU Graphene Flagship

26-Feb-2024 - The largest EU research initiative ever launched has come to a successful end: The Graphene Flagship was officially concluded at the end of last year. Empa researchers were also involved, such as molecular biologist Peter Wick, who was part of the Health and Environment work package from the very ...

Novel two-step mechanism revealed in two-dimensional material formation

Novel monitoring and analysis method

10-Dec-2021 - Two-dimensional materials are incredibly thin. Typically only an atom thick, 2D materials exhibit highly desirable properties for advanced technologies, such as flexibility, superconductivity and more. Made from carefully transitioning individual components from gas or vapor to crystalline ...

New approach to calculate electron traffic jam in transition metal dichalcogenide

21-May-2021 - Researchers at the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg and the Ulsan National Institute of Science and Technology (UNIST) in South Korea have found that the existing method to calculate a particular insulating state produces errors and suggest a new ...

Electrons in a plaster

Researchers have tailored the mutual interaction of electrons in an atomically thin solid by simply covering it with a crystal featuring hand-picked lattice dynamics

24-Mar-2021 - In a cubic centimeter of a solid there are typically 10²³ electrons. In this massive many-body system, seemingly simple pairwise electron-electron interaction can cause extremely complex correlations and exotic behavior, such as superconductivity. This quantum phenomenon turns a solid into a ...

Intelligent nanomaterials for photonics

Physicists and chemists engineer optical fibres with 2D materials

13-Oct-2020 - 2D materials – nanosheets with atomic thickness – have enormous potential for a wide variety of applications. For instance, combined with optical fibres, 2D materials can enable novel applications in the areas of sensors, non-linear optics, and quantum technologies. However, combining these two ...

Clarification of a new synthesis mechanism of semiconductor atomic sheet

Toward the realization of next-generation flexible optoelectronic devices

24-Sep-2019 - In Japan Science and Technology Agency's Strategic Basic Research Programs, Associate Professor Toshiaki Kato and Professor Toshiro Kaneko of the Department of Electronic Engineering, Graduate School of Engineering, Tohoku University succeeded in clarifying a new synthesis mechanism regarding ...

Substrate defects key to growth of 2D materials

14-May-2019 - Creating two-dimentional materials large enough to use in electronics is a challenge despite huge effort but now, Penn State researchers have discovered a method for improving the quality of one class of 2D materials, with potential to achieve wafer-scale growth in the future. The field of 2D ...

A long-distance relationship in femtoseconds

Physicists observe how electron-hole pairs drift apart at ultrafast speed, but still remain strongly bound

15-Apr-2019 - Modern electronics relies on ultrafast charge motion on ever shorter length scales. Physicists from Regensburg and Gothenburg have now succeeded in resolving a key quantum motion of electrons in atomically thin crystals on the time scale of a single oscillation cycle of light. They directly ...

Trapping ions in graphene

Simulating simple logic for nanofluidic computing

02-Jul-2018 - Invigorating the idea of computers based on fluids instead of silicon, researchers at the National Institute of Standards and Technology (NIST) have shown how computational logic operations could be performed in a liquid medium by simulating the trapping of ions (charged atoms) in graphene (a ...