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Trapping polaritons in an engineered quantum box

Australian researchers have engineered a quantum box for polaritons in a two-dimensional material, achieving large polariton densities and a partially 'coherent' quantum state. The novel technique allows researchers to access striking collective quantum phenomena and enable ultra-energy-efficient technologies.

SourceARC Centre of Excellence in Future Low-Energy Electronics Technologies·JournalPhysical Review Letters·TypeExperimental study·DateOct 19, 2022

A drop in the sea of electrons

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.

SourceARC Centre of Excellence in Future Low-Energy Electronics Technologies·JournalNature Communications·TypeExperimental study·DateOct 19, 2022

High-quality growth

Assistant Professor SUZUKI Hiroo and colleagues have developed a method to grow highly crystalline TMDCs, such as MoS2 and WS2, using chemical vapor deposition in a stacked substrate configuration. The technique produces samples with large domains and optimal photoluminescence characteristics.

SourceOkayama University·JournalACS Nano·DateOct 5, 2022

Building blocks of the future for photovoltaics

A research team from the University of Göttingen has observed the build-up of dark Moiré interlayer excitons for the first time using femtosecond photoemission momentum microscopy. This breakthrough allows scientists to study the optoelectronic properties of new materials in unprecedented detail.

SourceUniversity of Göttingen·JournalNature·TypeExperimental study·DateAug 18, 2022

A new neuromorphic chip for AI on the edge, at a small fraction of the energy and size of today’s compute platforms

The NeuRRAM chip demonstrates wide range of AI applications with equivalent accuracy while reducing energy consumption by up to 70% compared to traditional compute platforms. It also supports various neural network models and architectures, enabling diverse AI applications on edge devices.

SourceUniversity of California - San Diego·JournalNature·TypeExperimental study·DateAug 17, 2022

Gwangju Institute of Science and Technology scientists improve the power output of triboelectric nanogenerators with carbon particles

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.

SourceGIST (Gwangju Institute of Science and Technology)·JournalSmall Methods·TypeExperimental study·DateAug 9, 2022

Keeping the energy in the room

Professor Ben Mazin and his team developed precision optical sensors for telescopes, doubling the spectral resolving power. This breakthrough enables scientists to analyze exoplanet composition using spectroscopy, with implications for detecting different molecules across the universe.

SourceUniversity of California - Santa Barbara·JournalPhysical Review Letters·DateJul 1, 2022

A golden ticket to smaller electronics

A team of researchers at Osaka University developed a new method for direct three-dimensional bonding of copper electrodes using silver, enabling reliable connections at low temperatures without external pressure. The process can be performed under gentle conditions, resulting in permanent connections as small as 20 micrometers.

Let machines do the work: Automating semiconductor research with machine learning

Researchers use machine learning to automatically analyze Reflection High-Energy Electron Diffraction (RHEED) data, enabling faster and more efficient discovery of new materials. The study focused on surface superstructures in thin-film silicon surfaces and identified optimal synthesis conditions using non-negative matrix factorization.

SourceTokyo University of Science·JournalScience and Technology of Advanced Materials Methods·TypeExperimental study·DateJun 16, 2022

Researchers solve mystery surrounding dielectric properties of unique metal oxide

A University of Minnesota research team solved the long-standing mystery of strontium titanate's dielectric properties by accounting for interface effects. They achieved a dielectric constant exceeding 25,000 in epitaxial SrTiO3 films, making them suitable for applications such as electronic devices and data storage.

SourceUniversity of Minnesota·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateJun 13, 2022

Towards indoor lighting-powered thin-film, flexible solar cells with piezophototronics

Ritsumeikan University researchers create a novel thin-film flexible piezoelectric-photovoltaic device that can generate electricity from indoor lighting. The device's performance is improved through strain-induced polarization in the ZnMgO layer, increasing open-circuit voltage and overcoming charge recombination issues.

SourceRitsumeikan University·JournalNano Energy·TypeExperimental study·DateJun 8, 2022

‘Fruitcake’ structure observed in organic polymers

An international team of researchers has observed a unique 'fruitcake' structure in an organic polymer, revealing variations in hardness at the nanoscale. This discovery could lead to the development of next-generation microelectronic and bioelectronic devices with improved flexibility and biocompatibility.

SourceUniversity of Cambridge·JournalNature Communications·TypeExperimental study·DateJun 2, 2022

A fast and accurate innovative imaging technique to monitor modern semiconductor devices

Researchers at Samsung have developed a novel approach to inspect critical dimensions of semiconductor devices, improving speed and resolution. The new 'line-scan hyperspectral imaging' (LHSI) technique offers faster measurements with high spatial resolution, outperforming existing methods.

SourceSPIE--International Society for Optics and Photonics·JournalJournal of Micro/Nanopatterning Materials and Metrology·DateApr 21, 2022

‘Dative epitaxy’: A new way to stack crystal films

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.

SourceUniversity at Buffalo·JournalAdvanced Materials·DateApr 20, 2022

New quantum dots for quantum networks

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.

SourceOsaka University·JournalJournal of Applied Physics·TypeExperimental study·DateApr 7, 2022

An efficient electrochemical intercalation method for high-yield production of TMD nanosheets

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.

SourceCity University of Hong Kong·JournalNature Protocols·TypeExperimental study·DateApr 7, 2022

Engineers pave way for next-gen deep ultraviolet lasers

Researchers at Cornell University have developed a high-quality crystal of aluminum nitride and created an optical cavity to trap emitted light, enabling the production of a deep-ultraviolet laser with exceptional precision. The breakthrough has significant implications for various applications, including sterilization, sensing, and ph...

SourceCornell University·JournalAIP Advances·DateApr 4, 2022

Making a ‘sandwich’ out of magnets and topological insulators, potential for lossless electronics

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.

SourceARC Centre of Excellence in Future Low-Energy Electronics Technologies·JournalAdvanced Materials·TypeExperimental study·DateApr 2, 2022

Growing quantum dots in a regular arrangement

Scientists from Ruhr-University Bochum have improved the manufacturing process for quantum dots by creating a targeted arrangement on a wafer. The team discovered that the density of quantum dots was distributed concentrically due to the coating process, resulting in high-quality structures.

SourceRuhr-University Bochum·JournalNature Communications·DateMar 28, 2022

‘Self-driving’ lab speeds up research, synthesis of energy materials

Researchers at NC State University have developed a 'self-driving lab' that uses artificial intelligence and fluidic systems to advance our understanding of metal halide perovskite nanocrystals. The technology can autonomously dope MHP nanocrystals, adding manganese atoms on demand, allowing for faster control over properties.

SourceNorth Carolina State University·JournalAdvanced Intelligent Systems·TypeExperimental study·DateMar 16, 2022

Development of semiconductor microchip that can detect prostate cancer markers with ultra-high sensitivity

Researchers at Toyohashi University of Technology developed a microchip capable of detecting ultra-low concentrations of prostate cancer antigens using flexible nanosheets. The chip's lower detection limit is comparable to that of large testing devices, enabling fast and accurate diagnosis.

SourceToyohashi University of Technology (TUT)·JournalSensors·TypeExperimental study·DateMar 3, 2022