Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology
#Rice fine-tunes quantum dots from coal: Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene Abstract:
Quantum dots are semiconducting materials that are small enough to exhibit quantum mechanical properties that only appear at the nanoscale.
Tour's group found they could produce quantum dots with specific semiconducting properties by sorting them through ultrafiltration
The other single-step process involved direct control of the reaction temperature in the oxidation process that reduced coal to quantum dots.
"Quantum dots generally cost about $1 million per kilogram and we can now make them in an inexpensive reaction between coal
The lab found quantum dots that emit blue light were easiest to produce from bituminous coal. The researchers suggested their quantum dots may also enhance sensing, electronic and photovoltaic applications.
For instance, catalytic reactions could be enhanced by manipulating the reactive edges of quantum dots. Their fluorescence could make them suitable for metal
or chemical detection applications by tuning to avoid interference with the target materials'emissions. Rice graduate student Ruquan Ye is lead author of the paper.
2015quantum Dots/Rods Ghent University leads large-scale European training project on quantum dots March 13th, 2015optical nanoantennas set the stage for a NEMS lab-on-a-chip revolution February 24th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology February 23rd,
2015ocean Optics Names Winner of 2015 Young Investigator Award: Cash prize and grant awarded during SPIE Bios/Photonics West 2015 conference February 21st,201 2
TUNDERSTANDING defects in materials aids in performance predictions March 18th, 2015rice fine-tunes quantum dots from coal: Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene March 18th,
What happens when a quantum dot looks in a mirror? Abstract: The 2014 chemistry Nobel prize recognized important microscopy research that enabled greatly improved spatial resolution.
Examples of these types of light sources are fluorescent molecules, nanoparticles, and quantum dots. The JQI work uses quantum dots
which are tiny crystals of a semiconductor material that can emit single photons of light.
Image-dipole distortionsjqi fellow Edo Waks and his colleagues have performed nanoscopic mappings of the electromagnetic field profile around silver nanowires by positioning quantum dots (the emitter) nearby.
Previous work summarized at http://jqi. umd. edu/news/using-single-quantum dots-probe-nanowires. They discovered that sub-wavelength imaging suffered from a fundamental problem,
namely that an"image dipole"induced in the surface of the nanowire was distorting knowledge of the quantum dot's true position.
This uncertainty in the position of the quantum dot translates directly into a distortion of the electromagnetic field measurement of the object.
The quantum dot does not have a net electrical charge but it does have a net electrical dipole, a slight displacement of positive and negative charge within the dot.
2015rice fine-tunes quantum dots from coal: Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene March 18th,
Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology February 23rd,
March 10th, 2015more study needed to clarify impact of cellulose nanocrystals on health: Few studies explore toxicity of cellulose nanocrystals March 10th, 2015superconductivity Electrons in slow motion:
Here's how to see the'fastest slow process'--to understand superconductors March 9th, 2015strength in numbers:
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015are current water treatment methods sufficient to remove harmful engineered nanoparticle?
March 10th, 2015more study needed to clarify impact of cellulose nanocrystals on health: Few studies explore toxicity of cellulose nanocrystals March 10th,
2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Researchers synthesize new thin-film material for use in fuel cells:
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015high performance, lightweight supercapacitor electrodes of the future March 10th,
"The pyrochlore in question--Bi2pt2o7--has previously been synthesized successfully as a nanocrystalline powder. Epitaxial thin films can actually act as more efficient fuel cell catalysts than nanocrystalline powder,
but growing Bi2pt2o7 directly as a film requires oxidizing the platinum metal--a challenging step.
March 10th, 2015more study needed to clarify impact of cellulose nanocrystals on health: Few studies explore toxicity of cellulose nanocrystals March 10th, 2015thin films Graphene meets heat waves March 9th,
2015ciqus researchers obtain high-quality perovskites over large areas by a chemical method March 4th, 2015researchers enable solar cells to use more sunlight February 25th,
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015are current water treatment methods sufficient to remove harmful engineered nanoparticle?
March 10th, 2015more study needed to clarify impact of cellulose nanocrystals on health: Few studies explore toxicity of cellulose nanocrystals March 10th,
2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Researchers snap-shot fastest observations of superconductivity yet March 10th,
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015high performance, lightweight supercapacitor electrodes of the future March 10th,
Full bibliographic information News and information Next-generation illumination using silicon quantum dot-based white-blue LED June 7th,
2015discoveries Next-generation illumination using silicon quantum dot-based white-blue LED June 7th, 2015uab researchers design the most precise quantum thermometer to date:
2015announcements Next-generation illumination using silicon quantum dot-based white-blue LED June 7th, 2015uab researchers design the most precise quantum thermometer to date:
2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Next-generation illumination using silicon quantum dot-based white-blue LED June 7th,
2015next-generation illumination using silicon quantum dot-based white-blue LED June 7th, 2015uab researchers design the most precise quantum thermometer to date:
-Legislation/Regulation/Funding/Policy Next-generation illumination using silicon quantum dot-based white-blue LED June 7th,
News and information A step towards a type 1 diabetes vaccine by using nanotherapy June 10th, 2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th,
2015discoveries A step towards a type 1 diabetes vaccine by using nanotherapy June 10th, 2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th,
2015announcements A step towards a type 1 diabetes vaccine by using nanotherapy June 10th, 2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th,
2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th, 2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015filming the film:
Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th, 2015materials/Metamaterials Industrial Nanotech, Inc. Announces Launch of Heat shield (TM) EPX4 Thermal Insulation and Chemical Resistant Coating June 12th, 2015aspen Aerogels to Webcast 2015 Annual Meeting of Stockholders June 11th, 2015framework
a simple but very sensitive sensor based on fluorescence spectroscopy was presented by using cadmium telluride quantum dots to quickly measure protamine drug.
In addition to its high speed, this sensor minimizes environmental pollution due to the use of very low concentration of quantum dots in the production of the sensor and the lack of the need for toxic and organic solvents.
#Biomanufacturing of Cds quantum dots: A bacterial method for the low-cost, environmentally-friendly synthesis of aqueous soluble quantum dot nanocrystals Abstract:
A team of Lehigh University engineers have demonstrated a bacterial method for the low-cost, environmentally friendly synthesis of aqueous soluble quantum dot (QD) nanocrystals at room temperature.
Principal researchers Steven Mcintosh, Bryan Berger and Christopher Kiely, along with a team of chemical engineering, bioengineering,
scalable and green synthesis of Cds nanocrystals with extrinsic crystallite size control in the quantum confinement range.
The solution yields extracellular, water-soluble quantum dots from low-cost precursors at ambient temperatures and pressure.
The result is Cds semiconductor nanocrystals with associated size-dependent band gap and photoluminescent properties.
"Quantum dots, which have use in diverse applications such as medical imaging, lighting, display technologies, solar cells, photocatalysts, renewable energy and optoelectronics, are typically expensive and complicated to manufacture.
This newly described process allows for the manufacturing of quantum dots using an environmentally benign process and at a fraction of the cost.
Techconnect is the world's largest accelerator for industry-vetted emerging-technologies ready for commercialization June 11th, 2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th,
2015next-generation illumination using silicon quantum dot-based white-blue LED June 7th, 201 0
#World#s 1st Full-Color, Flexible, Skin-Like Display Developed at UCF A breakthrough in a University of Central Florida lab has brought those scenarios closer to reality.
2015philips Introduces Quantum dot TV with Color IQ Technology from QD Vision: Manufacturer is first to offer quantum dot displays for both TVS and monitors June 30th,
2015carnegie Mellon chemists characterize 3-D macroporous hydrogels: Methods will allow researchers to develop new'smart'materials June 30th, 2015discoveries Chitosan coated,
Layered semiconducting black arsenic phosphorus as an alternative to silicon July 9th, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th, 2015down to the quantum dot:
2015groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015engineering the worlds smallest nanocrystal July 2nd,
similar to the working principle of a quantum dot gated by an external electrode. In our case, the charged atoms nearby provide the electrostatic gate potential that regulates the electron flow
But there is a substantial difference between a conventional semiconductor quantum dot comprising typically hundreds or thousands of atoms and the present case of a surface-bound molecule:
Piet Brouwer, a physicist at FUB and expert in quantum transport theory, said that his intriguing behavior goes beyond the established picture of charge transport through a gated quantum dot.
2015grants/Awards/Scholarships/Gifts/Contests/Honors/Records Nanocrystalline Thin-film Solar cells July 15th, 2015better memory with faster lasers July 14th, 2015simpore, Uofr,
The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in"upconverting"photons in the visible and near-infrared regions of the solar spectrum."
In their experiments, Bardeen and Tang worked with cadmium selenide and lead selenide semiconductor nanocrystals.
The cadmium selenide nanocrystals could convert visible wavelengths to ultraviolet photons, while the lead selenide nanocrystals could convert near-infrared photons to visible photons.
In lab experiments the researchers directed 980-nanometer infrared light at the hybrid material, which then generated upconverted orange yellow fluorescent 550-nanometer light,
The researchers were able to boost the upconversion process by up to three orders of magnitude by coating the cadmium selenide nanocrystals with organic ligands,
and provided the nanocrystals. The UCR Office of Technology Commercialization has filed a provisional patent on the technology y
A Transparent and Photoluminescent Foldable Nanocellulose/Quantum dot Paper")a new step toward bendable electronics. They have developed the first light-emitting, transparent and flexible paper out of environmentally friendly materials via a simple, suction-filtration method.
and infused it with biocompatible quantum dots tiny, semiconducting crystals made out of zinc and selenium.
#Transient melting of a nanocrystal: seeing is believing (Nanowerk News) Jesse Clark, working as a postdoc in the LCN group of Ian Robinson,
has discovered a spectacular transient melting phenomenon in nanocrystals. Coherent X-ray diffraction experiments, carried out at the LCLS X-ray free electron laser facility at Stanford,
have allowed snapshot imaging of a single 300 nm gold nanocrystal in the picosecond time interval after the particle was excited with a laser.
and to reach the melting point about 50 ps later("Imaging transient melting of a nanocrystal using an X-ray laser").
Imaging transient melting of a nanocrystal using an x-ray laser. Snapshot projection images of a gold nanocrystal, 300nm across, before and after excitation with a femtosecond laser.
The second image, 50 picoseconds after excitation, displays a low density skin that returns to the original density at later times This result has significant implications beyond our basic understanding of the melting process.
#Next-generation illumination using silicon quantum dot-based white-blue LED (Nanowerk News) A silicon quantum dot (QD)- based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence
and their collaborators (Applied Physics Letters,"White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode").
"Regarding quantum dots: Semiconductor QDS can produce full-color luminescence through tuning of the particle size.
#Biomanufacturing of Cds quantum dots A team of Lehigh University engineers have demonstrated a bacterial method for the low-cost, environmentally friendly synthesis of aqueous soluble quantum dot (QD) nanocrystals at room temperature.
scalable and green synthesis of Cds nanocrystals with extrinsic crystallite size control in the quantum confinement range.
The solution yields extracellular, water-soluble quantum dots from low-cost precursors at ambient temperatures and pressure.
The result is Cds semiconductor nanocrystals with associated size-dependent band gap and photoluminescent properties.
"Quantum dots, which have use in diverse applications such as medical imaging, lighting, display technologies, solar cells, photocatalysts, renewable energy and optoelectronics, are typically expensive and complicated to manufacture.
This newly described process allows for the manufacturing of quantum dots using an environmentally benign process and at a fraction of the cost.
The first results achieved using"scanning quantum dot microscopy"have been published in the current issue of Physical Review Letters("Scanning Quantum dot Microscopy".
A single silver atom on a silver substrate (Ag (111)) under the scanning quantum dot microscope.
the scientists in Jlich attached a single molecule as a quantum dot to the tip of the microscope.
Quantum dots are tiny structures, measuring no more than a few nanometres across, which due to quantum confinement can only assume certain,
The scanning quantum dot micrograph of a PTCDA molecule reveals the negative partial charges at the ends of the molecule as well as the positive partial charges in the centre.
"In contrast to many other forms of scanning probe microscopy, scanning quantum dot microscopy can even work at a distance of several nanometres.
Other forms of quantum dots could be used as a sensor in place of the molecule, such as those that can be realized with semiconductor materials:
one example would be made quantum dots of nanocrystals like those already being used in fundamental research h
Published this week in Nature Communications("The surface structure of silver-coated gold nanocrystals and its influence on shape control"),Zhangs teams report on the discovery of a new methodology to study nanoparticle structures.
In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 billion gigahertz.
The quantum dots (red) are sandwiched between the silver cube and a thin gold foil. The study was published online on July 27 in Nature Communications("Ultrafast Spontaneous Emission Source Using Plasmonic Nanoantennas"."
This field interacts with quantum dots--spheres of semiconducting material just six nanometers wide--that are sandwiched in between the nanocube and the gold.
The quantum dots in turn, produce a directional, efficient emission of photons that can be turned on and off at more than 90 gigahertz."
"The group is now working to use the plasmonic structure to create a single photon source--a necessity for extremely secure quantum communications--by sandwiching a single quantum dot in the gap between the silver nanocube and gold foil.
and orient the quantum dots to create the fastest fluorescence rates possible. Aside from its potential technological impacts, the research demonstrates that well-known materials need not be limited by their intrinsic properties."
"We show how these crystals can be built up into complex structures by attaching particles as nanocrystals, clusters,
They can be small molecules, clusters, droplets, or nanocrystals. All of these particles are unstable and begin to combine with each other and with nearby crystals and other surfaces.
For example, nanocrystals prefer to become oriented along the same direction as the larger crystal before attaching,
2015 A new breed of quantum dots (QDS) could enable multilayer solar cells that capture more of the sun energy.
Individual germanium quantum dots were coated with silicon dioxide (silica), doped to make them p-type, and then deposited, using Natcore's liquid phase deposition (LPD) process,
or germanium quantum dots into layers using a process such as Natcore, which appears to be ideal for mass production,
which quantum dots are used to form both the p-type and n-type materials. Once this next step is achieved
Nanowire and contact formed at the same time Nanowires are extremely thin nanocrystal threads used in the development of new electronic components
#Biomanufacturing of Cds quantum dots A team of Lehigh University engineers have demonstrated a bacterial method for the low-cost, environmentally friendly synthesis of aqueous soluble quantum dot (QD) nanocrystals at room temperature.
scalable and green synthesis of Cds nanocrystals with extrinsic crystallite size control in the quantum confinement range.
The solution yields extracellular, water-soluble quantum dots from low-cost precursors at ambient temperatures and pressure.
The result is Cds semiconductor nanocrystals with associated size-dependent band gap and photoluminescent properties.
"Quantum dots, which have use in diverse applications such as medical imaging, lighting, display technologies, solar cells, photocatalysts, renewable energy and optoelectronics, are typically expensive and complicated to manufacture.
This newly described process allows for the manufacturing of quantum dots using an environmentally benign process and at a fraction of the cost.
to pass through two separate"quantum dots"--small crystals that have quantum properties.""If we could detect a superconducting current,
when they have been separated between the quantum dots. We confirm this separation by measuring a superconducting current that develops
"The quantum dots, each around 100 nanometers in size, were grown at random positions on a semiconductor chip.
the team was able to show clearly that the spin of the electrons remained entangled as they passed through the separate quantum dots."
and infused it with biocompatible quantum dots tiny, semiconducting crystals made out of zinc and selenium.
The researchers used quantum dots in strontium titanate to observe the electron pairs. Quantum dots are small regions of a material in
which the number of electrons can be controlled precisely, in this case using an electrostatic gate. The quantum dots were large enough to support a superconducting phase at low temperatures
but the researchers observed that the dots always preferred an even number of electrons in the new phase at higher temperatures.
and measured 58 quantum dots with varying dimensions and barriers between the quantum dots and the leads.
These images show differential conductance through the quantum dot as a function of the gate voltage that controls the number of electrons in the dot (x-axis) and the applied magnetic field (y-axis).
similar to the working principle of a quantum dot gated by an external electrode. In our case, the charged atoms nearby provide the electrostatic gate potential that regulates the electron flow
his intriguing behavior goes beyond the established picture of charge transport through a gated quantum dot.
or quantum dots, of controlled size and position. he technique allows two different materials to be incorporated into the same nanowire,
as well as development of the devices that deliver the stream of nanocrystals. The work is based on a team effort of ASU faculty Wei Liu
The quantum dots (red) are sandwiched between the silver cube and a thin gold foil. At its most basic level, your smart phone battery is powering billions of transistors using electrons to flip on and off billions of times per second.
In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 gigahertz.
The quantum dots, in turn, produce a directional, efficient emission of photons that can be turned on and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
with red quantum dots sandwiched between. he eventual goal is to integrate our technology into a device that can be excited either optically
is pushing pretty hard for. he group is now working to use the plasmonic structure to create a single photon source necessity for extremely secure quantum communicationsy sandwiching a single quantum dot in the gap between the silver nanocube and gold foil.
and orient the quantum dots to create the fastest fluorescence rates possible. Aside from its potential technological impacts
said that researchers had created the smallest laser possible powered by single electrons that burrow through quantum dots.
Boffins undertook the study to create a better understanding of how to use double quantum dots (two quantum dots joined together) as the basic units of information, known as qubits, in quantum computers.
Getting the double quantum dots to"communicate with each other"was the end goal explained physics grad Yinyu Liu,
who worked with Petta in his lab. Prof Petta added that a double quantum dot was capable of only transferring one electron at a time.
These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions.
The paper, Semiconductor double quantum dot micromaser, was published in the Science journal yesterday d
#Graphene sheaths could boost processor signal speeds by 30 per cent Scientists at Stanford have found a new use for graphene that will significantly increase the speed of standard computer processors.
#Princeton Researchers Develop Rice Sized Laser Princeton university researchers have built a rice sized laser powered by single electrons tunneling through artificial atoms known as quantum dots.
Quantum dots are nanocrystals, which are made of semiconductor materials that are small enough to exhibit quantum mechanical properties.
icrowave amplification by stimulated emission of radiation The researchers wanted to explore the use of double quantum dots,
Researchers stated that the goal was to get to double quantum dots to communicate with each other. They used extremely thin nanowires that were made of indium arsenide to fabricate the quantum dots.
The placed the qubits 6 mm apart in a cavity that was made from niobium at a temperature near absolute zero(-459 degrees Fahrenheit.
These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions
The study was started to explore the quantum dots, and not lasers. Quantum dots act like single atoms,
as components for quantum computers. The maser is a tiny, rice grain sized laser that is powered by a single electron from the artificial atoms called quantum dots.
Jason Petta an associate professor of physics at Princeton and the lead author of the study,
The researcher added that they were interested initially in exploring the use of quantum dots together. That means two quantum dots joined together as quantum bits or qubits.
Qubits are the basic unit of information in quantum computing. e designed dots to emit photons
These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions,
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