Articles tagged with Quantum Dots
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Researchers from IBS and Seoul National University created ultra-thin wearable QLEDs with resolutions approaching 2,500 pixels per inch. The technology enables the display of high-definition full-color displays on human skin.
Scientists have made a significant discovery in thermoelectric effects, which are crucial for nanoscale energy harvesting. Using quantum dots, researchers found that the actual performance of systems is less optimistic than predicted calculations, highlighting the importance of optimizing structures at the nanoscale.
Researchers at the University of Rochester have created optically active quantum dots in a 2D semiconductor, which could enable nanophotonics applications and integrated photonics. The defects on the atomically thin semiconductor emit single photons with correlated color and spin.
Researchers have developed a new approach to sharpen nanoscale microscopy by precisely determining the light source's location, overcoming diffraction limit challenges. This innovation enables super-resolution imaging with accuracy, correcting for image-dipole distortions and improving spatial resolution.
Researchers from Ohio State University and the University of Georgia collaborate to visualize cellular processes at a nanometer scale. The QSTORM project aims to enhance microscopy resolution for sub-cellular imaging, enabling scientists to make molecular movies of muscle contraction.
Researchers at Princeton University have successfully built a rice-sized laser powered by single electrons tunneling through artificial atoms known as quantum dots. The device demonstrates a major step forward for efforts to build quantum-computing systems out of semiconductor materials, according to co-author Jacob Taylor.
A team of researchers at Syracuse University developed a multilevel computational approach to simulate the formation and behavior of protein coronas on quantum dots. This breakthrough enables more accurate measurements in various biological applications, such as tumor cell imaging and biomolecule detection.
Researchers at Lund University used new tech to study fast solar cell processes, raising the efficiency limit to over 40%. Quantum coherence phenomenon allows for energy transfer with minimal obstacles, potentially revolutionizing solar cells.
A Rice University study examines how nanoparticles move through the food chain, tracing uptake and accumulation in plant roots, leaves, and caterpillars. The research found significant variation in nanoparticle accumulation rates based on surface coating types, with negatively charged particles avoiding clumping altogether.
Researchers used a scanning tunneling microscope to create atomic-scale maps of quantum dot surface structures, pinpointing defect locations that limit device performance. This breakthrough should help manufacturers tweak synthesis processes to produce higher-quality nanomaterials for photovoltaics and other applications.
Scientists at the Cavendish Laboratory and Joint Quantum Institute create a new type of qubit control that leverages its surroundings to maintain quantum integrity. By harnessing the environment's magnetic field, they enable efficient manipulation and readout of quantum states, paving the way for quantum computing advancements.
Researchers have discovered a way to control the properties of quantum dots by using ultrathin layers of metal oxides. This new approach makes quantum dots glow brighter and enhances their emission efficiency, which is crucial for applications such as sensors, light-emitting diodes, and solar cells.
Researchers have developed a new theoretical model that explains how nanostructures like the nano-pea pod can exhibit localized electrons. The findings reveal that localised electrons' appearance is strongly dependent on the variation of the length of the connecting wires in the bent chain.
Researchers have developed a new technology called 3M quantum dot enhancement film (QDEF) that efficiently makes liquid crystal display (LCD) screens more richly colored. The QDs produce specific colors of light based on their size, allowing for improved color gamut and reduced energy consumption compared to traditional LCDs.
Researchers have discovered a way to control quantum dot triplets using electrical impulses, which could lead to faster quantum computers. The study shows that changing the coupling of three coherently coupled quantum dots can induce a phase transition between entangled and disentangled electron states.
Scientists are developing new technologies at the atomic scale to create ultra-low-power electronics. This breakthrough has the potential to revolutionize the electronic industry, enabling smaller, more efficient devices that can be powered by longer-lasting batteries.
Physicists create quantum dots with identical, deterministic sizes using a scanning tunneling microscope. This achievement opens the door to quantum dot architectures free from uncontrolled variations.
Researchers at the University of Toronto have designed a new class of solar-sensitive nanoparticles that can improve solar cell efficiency and air stability. This breakthrough could lead to cheaper and more flexible solar cells, as well as better gas sensors and other optoelectronic devices.
Researchers at NIST discovered that certain quantum dots exhibit 'fluorescence intermittency,' blinking on nanosecond to millisecond timescales. This could impact the stability of quantum dot-based systems for high-speed communication and computing.
Researchers at Los Alamos National Laboratory and University of Milano-Bicocca have developed large-area luminescent solar concentrators using 'Stokes-shift-engineered' quantum dots. These concentrated solar cells can generate significant power from sunlight, enabling the creation of transparent photovoltaic windows.
Researchers at MIT have successfully designed and created living materials that incorporate non-living components, such as gold nanoparticles and quantum dots. These hybrid materials exhibit unique properties, including the ability to conduct electricity and emit light, making them suitable for various energy applications.
Researchers at the University of Cincinnati have identified a zero-dimensional quantum dot structure that can confine electronic excitations within semiconductor nanowires. This discovery has significant implications for harnessing solar energy, creating stronger lasers, and developing more sensitive medical diagnostic devices.
Researchers have demonstrated a novel quantum dot laser grown on silicon substrates, performing as well as similar lasers grown on their native substrates. This breakthrough enables large-scale photonic integration in an ultra low-cost platform.
Researchers at Linköping University have developed a method to emit polarized light directly from quantum dots, achieving an average polarization of 84%. This breakthrough enables the creation of more efficient polarized light-emitting diodes for LCD screens and wiretap-proof communications.
Researchers at the University of Warsaw have created two new types of solotronic structures containing single cobalt and manganese ions, exhibiting powerful magnetic properties. These findings open up a broad field for developing electronic devices operating on a single-atom level.
Physicists at the University of Basel have developed a quantum-classical hybrid system to stabilize the wavelength of photons emitted by a semiconductor, removing charge noise and enabling a stable single-photon source. This breakthrough could lead to improvements in semiconductor-based spin qubits and quantum communication.
Researchers at Los Alamos National Laboratory have developed a new generation of engineered quantum dots to reduce wasteful charge-carrier interactions in QD-LEDs. This breakthrough aims to improve the efficiency and operating lifetime of these devices, making them more suitable for lighting applications.
Researchers used computer modeling to predict electronic and optical properties of silicon structures with potential applications for solar energy collection. The study found that amorphous quantum dot chains significantly increase light absorption with increased interactions between individual nanospheres in the chain.
Researchers have created a method to control quantum bits using resonances in artificial atoms, enabling exponential parallel computation and solving complex tasks. The technique combines classical solid-state physics with atomic physics techniques, allowing for controlled electron spin orientation without measurement.
A new study found that tiny silicon crystals caused no health problems in monkeys three months after large doses were injected. The crystals, known as quantum dots, are promising for diagnostic imaging in humans due to their ability to absorb and emit light in the near-infrared spectrum.
Researchers have created a more systematic approach to synthesizing quantum dots, enabling the purification of semiconductor nanocrystals with uniform surface properties. The new method uses gel-permeation chromatography and has been shown to produce quantum dots with improved stability and reactivity.
Scientists have created a transistor without semiconductors, harnessing quantum tunneling for faster and more efficient electronics. The device uses nanoscale insulators and metals to control electrons at room temperature, promising miniaturization to virtually zero dimension.
A new microscopy technique developed by NIST researchers uses cathodoluminescence to image nanoscale features with high resolution. The technique combines the benefits of optical and scanning electron microscopes, evading traditional limitations such as diffraction and sample preparation requirements.
Researchers from the University of Louisville have developed new materials and production methods for commercially feasible quantum dot LEDs, increasing efficiency and color range. The innovative inkjet printing technique enables mass production, making these green lighting devices potentially affordable.
A University of Michigan researcher has developed a new thermoelectric material that converts waste heat into power with increased efficiency. The material, engineered at the atomic level, boosts its ability to convert heat into power by 200 percent and its electrical conductivity by 43 percent.
Researchers at NIST create three-dimensional scaffolds made with cells and hydrogels to evaluate the biological effects of nanoparticles. The hydrogel-based scaffolds provide a more realistic environment than current laboratory tests, allowing for longer-term studies and better representation of normal exposure levels.
Researchers at the University of Illinois Chicago have developed a method to introduce exactly four copper ions into each quantum dot, enabling fine-tuning of optical properties and production of vibrant colors. The study opens up possibilities for producing spectacular dyes with consistent results.
Scientists have demonstrated a process where quantum dots can self-assemble at optimal locations in nanowires, improving the efficiency of solar cells, quantum computing, and lighting devices. The breakthrough enables precise positioning of quantum dots relative to the nanowire's center, leading to high optical properties.
University of Michigan researchers create a new single-photon emitter that improves upon existing technology and is easier to make, paving the way for practical quantum cryptography. The device releases one photon at a time, allowing for secure communication by encoding messages in photons.
Researchers at Cambridge University have successfully generated high-quality photons identical to lasers from solid-state devices, a major breakthrough towards quantum networking. This achievement brings us closer to realizing a quantum internet, where distributed networks can share highly coherent and programmable photonic interconnects.
Researchers at U of T have developed a new technique to boost the efficiency of solar cells by up to 35% through the use of nanoshells. This breakthrough could lead to more affordable and efficient solar power, as the technology already offers low-cost and large-scale production capabilities.
Scientists from NREL and partners successfully demonstrated self-assembling quantum dots in a nanowire system for quantum photonics. The breakthrough could improve solar cell efficiency, quantum computing, and lighting devices due to the precise positioning of quantum dots within the nanowire.
A new type of nanoscale engine uses quantum dots to convert waste heat into electrical power, potentially making microcircuits more efficient. The system exploits resonant tunneling and can generate a significant amount of power depending on the temperature difference across the energy harvester.
Scientists use single quantum dots to excite plasmons in metal wires, creating precise images of electric field intensity with 12-nm accuracy. This technique enables new hybrid electronics by combining photonics and electronics for efficient sensing and processing.
Researchers at NIST have developed a way to predictably increase or decrease the intensity of quantum dot fluorescence by using DNA templates and controlling distances between gold nanoparticles. This breakthrough enables potential applications in photodetectors, chemical sensors, and nanoscale lasers.
Researchers at Worcester Polytechnic Institute and UMass Amherst studied the transport of bio-molecular complexes along microtubules. They found that motor proteins cooperate to minimize traffic jams, allowing cargos to travel farther before becoming detached.
Researchers at Rice University have created a new type of nanoparticle called lava dots, which are hollow and coated versions of quantum dots. The particles were discovered using a 'molten-droplet synthesis' technique and can be used as catalysts for hydrogen production, chemical sensors, and solar cells.
Researchers at Princeton University have made a breakthrough in creating a working quantum computer by developing a method to quickly and reliably transfer quantum information. This achievement enables the creation of larger systems with millions of qubits, solving problems that cannot be solved with conventional computers.
Researchers at the University of Texas at Dallas are developing nanotechnology to create ultra-thin-film photovoltaic devices that convert light into electric power. By reducing the thickness of silicon from hundreds of microns to just one micron, they aim to achieve lighter and more flexible solar cells with improved efficiency.
Researchers in Dresden observed how electrons in individual quantum dots absorb energy and emit it as light. They used scanning near-field microscopy to excite electrons and measure their energy levels.
Researchers aim to create nanoelectronic devices and logic circuits using quantum dots and light, promising breakthroughs in electronic circuitry density and speed. The project combines organic chemistry, semiconductor growth, and nanofabrication to develop a solid-state technology platform.
Scientists at the University of Sheffield have developed a groundbreaking nuclear magnetic resonance apparatus that allows for non-invasive analysis of nanostructures. This breakthrough opens up new possibilities for nanotechnology applications in solar energy, computing, and medicine.
Researchers from U of T and KAUST created a solar cell with world-record efficiency of 7.0%, increasing efficiency by 37% over previous records. The breakthrough uses hybrid passivation to improve device efficiency, opening up avenues for further research and improvement.
Researchers at the National Physical Laboratory have created an electron pump nano-device that can manipulate individual electrons to create a well-defined electrical current. The device achieves this by speeding up the rate of pumping electrons while maintaining accuracy, surpassing previous records.
Researchers track serotonin regulation at a new level of detail using tiny fluorescent beads, shedding light on the dynamics of neurotransmitter transport. The study reveals two distinct populations of serotonin transporters, controlled by different regulatory pathways.
A groundbreaking study found quantum dots to be safe in primates over a one-year period, with no signs of illness or toxicity. The results suggest that medical applications such as image-guided surgery and diagnostic tests could be viable with careful use.
Researchers have successfully boosted the fluorescent efficiency of ultra-small quantum dots to as high as 45%, making them suitable for special lighting applications. This improvement translates to a higher luminous efficiency of about 40 lumens/watt, outperforming existing LEDs and incandescent bulbs.
A new prototype technology demonstrates all three primary laser colors coming from one material. This breakthrough could lead to making products such as high-performance digital displays that employ a variety of laser colors.
Physicists have devised a new method to handle vibrations' effect on electron transport, improving qubit information transfer. The model simulates closer control over phonons and electrons, enabling stronger coupling regimes.
NIST researchers studied the self-assembly of quantum dots using DNA origami, determining critical factors and error rates. They found that simple structures take up to 24 hours to assemble with an error rate of about 5 percent.