Quantum Dots Current Events

Quantum Dots Current Events, Quantum Dots News Articles.
Sort By: Most Viewed | Most Recent
Page 1 of 25 | 1000 Results
Seizing the moment: improving control of quantum dots
Researchers at the National Institute of Standards and Technology (NIST) and the National Renewal Energy Laboratory (NREL) report a way to measure accurately the amount of laser light needed to shift the electrons in a particular type of quantum dot between two discrete states, a low energy, ground state and a higher energy, excited state. This advance is another step toward the use of (2003-06-24)

Smallest ever quantum dots bring real world applications closer
Single atom quantum dots created by researchers at Canada's National Institute for Nanotechnology and the University of Alberta make possible a new level of control over individual electrons, a development that suddenly brings quantum dot-based devices within reach. Composed of a single atom of silicon and measuring less than one nanometer in diameter, these are the smallest quantum dots ever created. (2009-01-27)

Dot, dot, dot . . . How quantum dots line up
A method that can be used to predict the growth of earthquake faults also aids prediction of the tiniest of phenomena -- how arrays of (2003-07-09)

Nanoscience study shows that quantum dots 'talk'
Scientists who hope to use quantum dots as the building blocks for the next generation of computers have found a way to make these artificial atoms communicate. (2006-02-21)

Researchers set new record for brightness of quantum dots
By placing quantum dots on a specially designed photonic crystal, researchers at the University of Illinois have demonstrated enhanced fluorescence intensity by a factor of up to 108. Potential applications include high-brightness light-emitting diodes, optical switches and personalized, high-sensitivity biosensors. (2007-09-25)

Etched quantum dots shape up as single photon emitters, NIST tests show
Like snowflakes or fingerprints, no two quantum dots are identical. But a new etching method for shaping and positioning these semiconductor nanocrystals might change that. Tests at NIST confirm that etched quantum dots emit single particles of light, boosting prospects for powering new types of devices for quantum communications. (2011-02-23)

Improving quantum dot interactions, one layer at a time
Osaka City University scientists and colleagues in Japan have found a way to control an interaction between quantum dots that could greatly improve charge transport, leading to more efficient solar cells. Their findings were published in the journal Nature Communications. (2020-11-20)

US Naval Research Laboratory 'connects the dots' for quantum networks
Researchers at the US Naval Research Laboratory developed a novel technique that could enable new technologies that use properties of quantum physics for computing, communication and sensing, which may lead to 'neuromorphic' or brain-inspired computing. (2019-07-09)

Scientists age quantum dots in a test tube
Researchers from MIPT and the RAS Institute of Problems of Chemical Physics have proposed a simple and convenient way to obtain arbitrarily sized quantum dots required for physical experiments via chemical aging. (2020-11-19)

Shining a light on quantum dots measurement
Using the cadmium selenide quantum dot, researchers at Syracuse University collaborated to understand how protein corona forms and what is different about the quantum dot before and after the formation of the corona. (2015-01-15)

Spinning quantum dots
A new paper in EPJ B presents a theoretical analysis of electron spins in moving semiconductor quantum dots, showing how these can be controlled by electric fields in a way that suggests they may be usable as information storage and processing components of quantum computers. (2020-01-15)

Simultaneous detection of multiple spin states in a single quantum dot
Osaka University-led researchers achieved single-shot readout of three two-electron spin states of a single quantum dot. This is the first example of simultaneous detection of multiple spin states in a single quantum dot. The team measured the change in current of a quantum point contact charge sensor near a quantum dot, which depended on both spin state and spin-orbital interactions. Their findings represent a step forward on the path to realizing quantum computing. (2017-03-13)

Three for the price of one - mobile electrons multiplied in quantum dot films
Researchers of the Opto-electronic Materials section of Delft University of Technology in the Netherlands and Toyota Europe have demonstrated that several mobile electrons can be produced by the absorption of a single light particle in films of coupled quantum dots. These multiple electrons can be harvested in solar cells with increased efficiency. The researchers published their findings in October issue of the scientific journal Nano Letters. (2011-10-14)

Optical shaping of polarization anisotropy in a laterally-coupled-quantum-dot dimer
Coupled-quantum-dot (CQD) structures are considered to be an important building block in the development of scalable quantum devices. We found that emission of a laterally-coupled QD structure is strongly polarized along the coupled direction and its polarization anisotropy can be shaped by changing the orientation of the excitation polarization. Surprisingly, both excitons and local biexcitons separately in the two quantum dots show the same anisotropy although the polarization anisotropy of the emission is determined by the excitation polarization. (2020-07-10)

Scientists create new device to light up the way for quantum technologies
Researchers at CRANN and the School of Physics at Trinity College Dublin, Ireland, have created an innovative new device that will emit single particles of light, or photons, from quantum dots that are the key to practical quantum computers, quantum communications, and other quantum devices. (2020-07-07)

Defects in atomically thin semiconductor emit single photons
Researchers at the University of Rochester have shown that defects on an atomically thin semiconductor can produce light-emitting quantum dots. The quantum dots serve as a source of single photons and could be useful for the integration of quantum photonics with solid-state electronics -- a combination known as integrated photonics. (2015-05-04)

Tagging faulty genes with fluorescent nanodots
A nanoscale imaging technique that could improve the reliability of an important diagnostic test for breast cancer, and other biomedical tests, is described by NIST researchers in a recent online issue of Nucleic Acids Research. The NIST team demonstrated that quantum dots attached to specific genes give off signals that are 200 to 1,100 percent more intense than those from two types of conventional tags, and are also more stable when exposed to light. (2004-02-26)

Researchers uncover new light harvesting potentials
Griffith University researchers have discovered significant new potentials for light harvesting through narrowing the bandgap of titania and graphene quantum dots. (2016-07-13)

Unleashing the power of quantum dot triplets
Quantum computers have yet to materialize. Yet, scientists are making progress in devising suitable means of making such computers faster. One such approach relies on quantum dots -- a kind of artificial atom, easily controlled by applying an electric field. A new study published in European Physical Journal B demonstrates that changing the coupling of three coherently coupled quantum dots with electrical impulses can help better control them. (2014-07-24)

Two quantum dots are better than one: Using one dot to sense changes in another
Osaka University researchers developed the first device that can detect single-electron events in a self-assembled quantum dot in real time. The device detects the single-electron tunneling events of one quantum dot as changes in the current produced by a second quantum dot in close proximity. This device allows single-electron events in quantum dots to be investigated, which is beneficial for the development of photonic devices and quantum computing. (2018-09-19)

Get ready for a new periodic table
Get ready for a new periodic table! Researchers at Hebrew university combine quantum dot 'atoms' and create new 'molecules.' (2019-12-16)

Making quantum dots glow brighter
Researchers have found a new way to control the properties of quantum dots, those tiny chunks of semiconductor material that glow different colors depending on their size. Quantum dots, which are so small they start to exhibit atom-like quantum properties, have a wide range of potential applications, from sensors, light-emitting diodes, and solar cells, to fluorescent tags for biomedical imaging and qubits in quantum computing. (2014-09-16)

3-D X-ray images of nanoparticles
A new X-ray microscope can look at nanomaterials in three dimensions. (2006-11-27)

Don't blink! NIST studies why quantum dots suffer from 'fluorescence intermittency'
Researchers have found that a particular species of quantum dots that weren't commonly thought to blink, do. So what? Well, although the blinks are very short -- nanoseconds to milliseconds -- even brief fluctuations like these could signal trouble for using quantum dots in a quantum computer or between nodes of a future quantum Internet. (2014-05-22)

Light touch: Controlling the behavior of quantum dots
Researchers from NIST and the Joint Quantum Institute have reported a new way to fine-tune the light coming from quantum dots by manipulating them with pairs of lasers. Their technique could significantly improve quantum dots as a source of pairs of entangled photons for applications in quantum information technologies. (2008-08-19)

Professor uses diamond to produce graphene quantum dots and nano-ribbons of controlled structure
Kansas State University researchers have come closer to solving an old challenge of producing graphene quantum dots of controlled shape and size at large densities, which could revolutionize electronics and optoelectronics. (2012-05-17)

JQI researchers create entangled photons from quantum dots
To exploit the quantum world to the fullest, a key commodity is entanglement -- the spooky, distance-defying link that can form between objects such as atoms even when they are completely shielded from one another. Now, physicists at the Joint Quantum Institute, a collaborative organization of the National Institute of Standards and Technology and the University of Maryland, have developed a promising new source of entangled photons using quantum dots tweaked with a laser. (2009-11-17)

Computing breakthrough could elevate security to unprecedented levels
By using pulses of light to dramatically accelerate quantum computers, University of Michigan researchers have made strides in technology that could foil national and personal security threats. (2007-08-16)

A burst of 'synchronous' light
Excited photo-emitters can cooperate and radiate simultaneously, a phenomenon called superfluorescence. Researchers from Empa and ETH Zurich, together with colleagues from IBM Research Zurich, have recently been able to create this effect with long-range ordered nanocrystal superlattices. This discovery could enable future developments in LED lighting, quantum sensing, quantum communication and future quantum computing. The study has just been published in the renowned journal Nature. (2018-11-08)

Researchers develop faster, precise silica coating process for quantum dot nanorods
Materials researchers have fine-tuned a technique that enables them to apply precisely controlled silica coatings to quantum dot nanorods in a day -- up to 21 times faster than previous methods. In addition to saving time, the advance means the quantum dots are less likely to degrade, preserving their advantageous optical properties. (2016-07-11)

U-M physicists create first atomic-scale map of quantum dots
University of Michigan physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing (2009-09-29)

NREL and partners demonstrate quantum dots that assemble themselves
Scientists from the U.S. Department of Energy's National Renewable Energy Laboratory and other labs have demonstrated a process whereby quantum dots can self-assemble at optimal locations in nanowires, a breakthrough that could improve solar cells, quantum computing, and lighting devices. (2013-02-19)

NREL and partners demonstrate quantum dots that assemble themselves
Scientists from the US Department of Energy's National Renewable Energy Laboratory and other labs have demonstrated a process whereby quantum dots can self-assemble at optimal locations in nanowires, a breakthrough that could improve solar cells, quantum computing, and lighting devices. A paper on the new technology, (2013-04-16)

Cadmium selenide quantum dots degrade in soil, releasing their toxic guts, study finds
Quantum dots made from cadmium and selenium degrade in soil, unleashing toxic cadmium and selenium ions into their surroundings, a University at Buffalo study has found. (2011-07-18)

Quantum dots provide complete control of photons
By emitting photons from a quantum dot at the top of a micropyramid, researchers at Linköping University are creating a polarized light source for such things as energy-saving computer screens and wiretap-proof communications. (2014-01-31)

Detraction-free light-matter interaction
Certain semiconductor structures, so-called quantum dots, might constitute the foundation of quantum communication. They are an efficient interface between matter and light, with photons (light particles) emitted by the quantum dots transporting information across large distances. However, structures form by default during the manufacture of quantum dots that interfere with communication. (2019-08-23)

Improved stability of electron spins in qubits
Calculation with electron spins in a quantum computer assumes that the spin states last for a sufficient period of time. Physicists at the University of Basel and the Swiss Nanoscience Institute have now demonstrated that electron exchange in quantum dots fundamentally limits the stability of this information. Control of this exchange process paves the way for further progress in the coherence of the fragile quantum states. The report from the Basel-based researchers appears in the scientific journal Physical Review Letters. (2015-09-07)

Producing spin-entangled electrons
A team from the RIKEN Center for Emergent Matter Science, along with collaborators from several Japanese institutions, have successfully produced pairs of spin-entangled electrons and demonstrated, for the first time, that these electrons remain entangled even when they are separated from one another on a chip. This research could contribute to the creation of futuristic quantum networks operating using quantum teleportation. (2015-07-01)

Microneedle, quantum dot study opens door to new clinical cancer tools
Researchers from North Carolina State University have developed extremely small microneedles that can be used to deliver medically relevant nanoscale dyes called quantum dots into skin -- an advance that opens the door to new techniques for diagnosing and treating a variety of medical conditions, including skin cancer. (2010-08-25)

Quantum dot transistor simulates functions of neurons
Researchers at the Federal University of São Carlos (UFSCar) in São Paulo State, Brazil, Würzburg University in Germany, and the University of South Carolina in the United States developed a transistor that can lead to the development of new kinds of device and computer circuit in which memory units are combined with logical processing units, economizing space, time, and power consumption. (2017-06-14)

Page 1 of 25 | 1000 Results
   First   Previous   Next      Last   
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.