Articles tagged with Quantum Dots
Scientists have developed single-electron pumping devices in ZnO nanobelt transistors, enabling controlled single- and double-electron pumping at room temperature. This breakthrough has significant implications for spin-based quantum computing and quantum information processing.
A research team has identified the cause of performance degradation in CQD PV devices and developed a material processing method to stabilize their performance. The method uses ligand substitution with potassium iodide, maintaining device efficiency above 80% for 300 hours.
A team at NIST has developed an AI system that can auto-tune quantum dots for creating functional qubits, overcoming a major engineering hurdle. The system uses machine learning to recognize images of quantum dot measurements and make precise adjustments.
Researchers have developed a novel technology to maximize the performance of colloidal quantum dot (CQD) solar cells. The new hybrid tandem photovoltaic devices feature CQDs and organic bulk heterojunction photoactive materials, improving photon harvesting and achieving high power conversion efficiency.
Researchers directly observed a Kondo screening cloud, a quantum phenomenon that masks magnetic impurities in materials. The study confirmed theoretical predictions and provided insights into the spatial extension of the cloud, which is universally scaled by the inverse of the Kondo temperature.
Researchers successfully measured and controlled the length of the Kondo cloud, a phenomenon discovered in the 1930s that explains resistance increase in certain metals. The findings provide insights into multiple impurity systems, including high-temperature superconductors.
Engineers at MIT developed a small, mirrored chip that helps produce dark-field images without expensive components. The chip can be added to standard microscopes or hand-held microscopes to visualize difficult-to-image biological organisms.
Researchers at the University of Queensland have achieved a significant breakthrough in solar technology by developing a unique surface engineering strategy that improves the conversion of solar energy to electricity. The team set a world record for quantum dot solar cell efficiency, reaching 16.6%, which is a major improvement over pr...
Scientists have developed a novel plasmonic platform to tailor the spontaneous near-to-mid IR emission of HgTe quantum dots, achieving a 5-fold enhancement of PL quantum yield and reducing non-radiative decay. The study demonstrates the potential for precise tuning of IR-emitting QDs' emission, improving device performance.
Scientists from FEFU and colleagues developed a resonant lattice laser that controls the near- and mid-IR radiation properties of mercury telluride QDs, overcoming fundamental physical limitations. This enables the creation of ultra-compact bright sources for quantum computers and advanced sensors.
Researchers created and imaged a novel pair of coupled quantum dots, which could serve as robust quantum bits for a quantum computer. The patterns of electric charge in the islands cannot be fully explained by current models of quantum physics, offering an opportunity to investigate new physical phenomena.
Researchers at ICFO have developed a novel photodetector technology using PbS Colloidal Quantum Dots (CQDs) that can detect light in the long infrared range. The new material platform is made with mercury-free material, enabling lower energy detection and broader spectral coverage.
Physicists Sanjay Prabhakar and Roderick Melnik modelled the interplay between electric fields and electron spins in slowly moving quantum dots. They revealed that spin-orbit coupling occurs, inducing a magnetic field in the absence of an external one.
Researchers successfully demonstrated a quantum dot LED that operates as an optically pumped laser, clearing the path towards versatile colloidal quantum dot laser diodes. These devices have the potential to revolutionize fields like photonics, optoelectronics, and medical diagnostics.
A research team developed a microneedle platform using fluorescent quantum dots to deliver vaccines and record vaccination history in the skin. The platform offers a dependable way for clinicians to keep accurate medical records, potentially saving millions of lives worldwide.
Researchers have developed a novel way to record patient vaccination history by storing data in a pattern of invisible dye delivered under the skin. The dye remains stable for at least five years and can be detected using a specially equipped smartphone, promising to improve vaccine administration in developing nations.
Researchers at Hebrew University developed a method to combine quantum dots into new molecular structures with unique properties and characteristics. This breakthrough lays the foundation for various opto-electronic, sensing, and quantum technologies applications.
Researchers aim to leverage quantum dot technology to understand how living things conduct internal communications and send messages to other organisms. They will track the movement of extracellular vesicles and their cargo using quantum dots, which offer superior brightness and stability.
Researchers have successfully created an efficient quantum-mechanical light-matter interface using a microscopic cavity, enabling interactions between individual photons and artificial atoms. The experiment demonstrates the potential for new quantum technological applications in photonics and quantum information processing.
Australian researchers have fabricated a self-assembled, carbon-based nanofilm where the charge state can be controlled at the level of individual molecules. The system has exciting implications for fields like computer memory, light-emitting devices and quantum computing.
Researchers from Oxford, Basel, and Lancaster develop an algorithm that uses machine learning to automate the process of characterizing quantum dots. By reducing measuring time and number of measurements, this approach enables efficient characterization of large arrays of quantum devices.
Quantum dots have been successfully modified to produce interference-free photons, paving the way for quantum communication. Researchers eliminated interferences by adding an aluminium arsenide layer grown above the quantum dots in the wetting layer.
Engineers developed a novel scanning quantum dot microscopy method that enables the accurate measurement of electrical potentials at molecular resolution. This breakthrough allows for high-resolution images of potential fields, previously unattainable, and opens up possibilities for creating nanostructures via 3D printing.
Researchers at US Naval Research Laboratory developed a new technique that enables precise control over quantum dot wavelengths, paving the way for breakthroughs in quantum information technologies and brain-inspired computing. This achievement could lead to new technologies that harness the strange properties of quantum physics for co...
Researchers from Forschungszentrum Jülich developed a new scanning quantum dot microscopy method that can measure electric potentials of individual atoms and molecules. This allows for the characterization of biomolecules like DNA and opens up new opportunities for chip manufacture.
Scientists have developed a method to determine the geometry of electrons in quantum dots, allowing for better control of electron spins. This could lead to the development of smaller information units in future quantum computers.
Researchers at the University of Toronto have discovered a way to combine perovskite crystals and quantum dots to create a stable hybrid material that can increase the efficiency of solar cells. The resulting material remains stable under ambient conditions for six months, significantly longer than similar materials without stabilization.
A team of Sydney researchers has achieved a world-record result in reducing errors in semiconductor electron 'spin qubits', a crucial step towards building useful quantum computers. The result, published in Nature Electronics, demonstrates error rates as low as 0.043 percent.
Scientists from Michigan Technological University have successfully created 2D gold quantum dots that can be customized at the atomic level on boron nitride nanotubes. This breakthrough enables the creation of tunable semiconducting materials with potential applications in future electronics and quantum computing.
Scientists have developed a method to swap electron spins between distant quantum dots, enabling fast interaction and space for pulsed gate electrodes. This breakthrough brings us closer to future applications of quantum information and potential quantum computers.
Researchers at North Carolina State University have developed a microfluidic system that can synthesize perovskite quantum dots across the entire spectrum of visible light. The system drastically reduces manufacturing costs and allows for real-time process monitoring to ensure quality control, enabling mass production of high-quality QDs.
Researchers at Stanford University have developed a new measurement technique that confidently shows the efficiency of quantum dots can compete with single crystals. This breakthrough could lead to the development of new technologies and materials requiring high semiconductor efficiency.
A new method for making infrared cameras using quantum dots offers faster production and better performance. This technology could enable the use of infrared cameras in autonomous vehicles, smartphones, and other devices, improving their ability to detect heat signatures and see through smoke and fog.
Researchers at MIT and ETH in Zurich have developed a system to produce coherent single photons using perovskite quantum dots. The study found that these materials can maintain coherence levels approaching those of established emitters, making them promising for quantum computing applications and secure quantum communications.
A team of Cambridge researchers controlled the sea of nuclei in semiconductor quantum dots, enabling them to operate as a quantum memory device. This achievement harnesses the interaction between electrons and nuclear spins, proving the nuclei can exchange information with an electron qubit.
A new method using quantum dots tracks individual pollen grains, providing insights into the mysterious journey of pollen. Researchers can now observe where most pollen grains land up once they leave flowers.
Researchers at UCSB have developed a high-performance quantum dot mode-locked laser on silicon, which can increase data transmission capacity by an estimated decade. The technology has the potential to significantly improve data centers' and telecommunications companies' performance.
Researchers discovered a novel phenomenon that corrects wavelength splitting in quantum dot lasers, improving their efficiency. This breakthrough has significant implications for optics and photonics research, including the development of light-based micro-chips.
Researchers at Binghamton University developed a new water splitting catalyst that enables efficient hydrogen gas production from solar energy. The catalyst, which uses doped vanadium pentoxide nanowires, shows a ten-fold increase in solar-harvested hydrogen compared to undoped materials.
Researchers at the University of the Basque Country have successfully encapsulated semiconductor nanocrystals into polymers, improving their optical properties and fluorescence control. The new method enables stable detection in biomedicine and detection of volatile organic compounds (VOCs) with high sensitivity.
Researchers at Los Alamos National Laboratory developed a new method to intentionally 'squash' colloidal quantum dots, creating dots capable of stable, blink-free light emission. This approach suppresses spectral fluctuations in single-dot emission and results in spectrally narrow light with highly stable intensity.
Researchers at ICFO have developed colloidal quantum dot (CQD) infrared emitting LEDs with unprecedented values in the infrared range, achieving external quantum efficiency of 7.9% and power conversion efficiency of 9.3%. The CQDs' unique properties allow for efficient charge funnelling and low electronic defect density, enabling signi...
The Q.Link.X project funds a quantum repeater development to overcome transmission link limitations in optical fiber-based quantum communication, aiming for distances of up to ten or 100 kilometers.
Researchers at Empa and ETH Zurich have developed a novel quantum light source by arranging perovskite quantum dots into a three-dimensional superlattice. This enables the coherent collective emission of photons, creating ultrafast and bright superfluorescence.
Researchers developed novel quantum dots for enhanced mRNA FISH, achieving accurate RNA counting and 3D cell imaging. The new probe overcomes FISH limitations with compact quantum dots, providing stable and efficient labeling.
Researchers have developed cadmium-free nanomaterials for artificial photosynthesis, showing high efficiency in producing hydrogen from light and water. The new composites are environmentally friendly and have the potential to serve as an eco-friendly alternative for various commercial fields.
Researchers at Brown University have successfully assembled complex macroscale superstructures from pyramid-shaped nanoparticle building blocks. The 3D supercrystals demonstrated in the study possess aligned atomic structures, which may lead to interesting optical properties.
Researchers have developed the first device that can measure the single-electron charge of one quantum dot using a second as a sensor, enabling real-time detection of single-electron tunneling. This breakthrough could aid in the development of advanced nanoelectronics and quantum computing.
A team of researchers from Beihang University has fabricated a new type of nonprecious metal-based electrocatalyst, VNQD-NG, for oxygen reduction reaction. The material exhibits high electrocatalytic activity, long durability, and high selectivity for ORR.
A team of scientists at ETH Zurich have found a way to avoid disturbances in qubit operations by coupling a microwave photon to a spin qubit. The researchers created a 'spin trio' consisting of three quantum dots and demonstrated strong coupling between the spin qubits and a microwave photon.
Researchers have developed nanomaterial-based white LEDs with a record luminous efficiency of 105 lumens per watt, promising a promising energy-efficient lighting source for homes and offices. The new LEDs use commercially available blue LEDs combined with flexible lenses filled with quantum dots to create white light.
Research by Swansea University and Indian team finds that tea leaf extract-based nanoparticles inhibit lung cancer cell growth, destroying up to 80%. Quantum dots produced from tea leaves also show promise in bioimaging and anticancer applications.
A new method for studying semiconductor nanoparticles has been developed using the magneto-optic effect, allowing for non-invasive analysis without altering the structure. The method was successfully tested on cadmium telluride nanoparticles and showed promising results.
Physicists from TU Dresden and JMU developed a novel approach to measure optical near-fields with significantly less effort. By using biomolecules as a transport system, they can slide extremely small optical nano-probes over a surface, circumventing the diffraction limit.
Researchers have developed III-V quantum-dot lasers that can be integrated with silicon, offering significant energy savings and improved performance. The lasers can operate at higher temperatures and scale down to smaller sizes, making them promising for photonic circuits.
Researchers developed a new type of quantum dot allowing for highly tunable energy levels of confined electrons, enabling potential applications in valleytronics. The discovery uses a combination of graphene and hexagonal boron nitride materials.
Researchers have successfully harnessed the power of quantum mechanics by controlling the interaction between light and matter at room temperature. By using plasmonic nanoresonators to concentrate electromagnetic energy, they enabled the re-absorption of photons by quantum emitters with high probability.
Researchers at Kumamoto University developed a technique to assess quantum dot photoluminescence emission mechanisms using polyoxometalates. The study revealed previously unseen peak emissions at 410 nm due to bulk defects in the quantum dots.
For the first time, a Toffoli gate was experimentally demonstrated in a semiconductor three-qubit system. This achievement marks an important progress in scaling up semiconductor quantum dot-based qubits and motivates further research on larger-scale semiconductor quantum processors.
A new imaging technique uses a super sharp needle to nudge individual nanoparticles into different orientations, capturing 2D images to reconstruct 3D pictures. This method allows for the observation of defects in nanostructures like semiconductors and proteins, which can lead to better characterization and control of their production.