Sentences with phrase «nanocrystals with»

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.

Using star - shaped block co-polymer structures as tiny reaction vessels, researchers have developed an improved technique for producing nanocrystals with consistent sizes, compositions and architectures — including metallic, ferroelectric, magnetic, semiconductor and luminescent nanocrystals.

For the future, Lin envisions more complex nanocrystals with multifunctional shells and additional shapes, including nanorods and so - called «Janus» nanoparticles that are composed of biphasic geometry of two dissimilar materials.

The research results, «Germanium - Tin / Cadmium Sulfide Core / Shell Nanocrystals with Enhanced Near - Infrared Photoluminescence,» were published in the American Chemical Society's journal Chemistry of Materials.

The result is CdS semiconductor nanocrystals with associated size - dependent band gap and photoluminescent properties.

Using an engineered strain of Stenotrophomonas maltophilia to control particle size, Lehigh researchers biosynthesized quantum dots using bacteria and cadmium sulfide to provide a route to low - cost, scalable and green synthesis of CdS nanocrystals with extrinsic crystallite size control in the quantum confinement range.

In a paper published June 13 in Angewandte Chemie, the UCSC researchers reported the results of experiments using unique branched ligands to synthesize perovskite nanocrystals with greatly improved stability and uniform particle size.

«You need several control samples — a PbS nanocrystal with lead oxide precursor and another precursor that does not involve water during synthesis,» he says.

Not exact matches

A nanoparticle (or nanopowder or nanocluster or nanocrystal) is a microscopic particle with at least one dimension less than 100 nm.

Philippe Walter of the C2RMF, lead author of the report, says he has not studied what happens to hair dyed with Grecian Formula, but he suspects nanocrystals are also at work.

Conventional perovskite nanocrystals capped with ligands consisting of long straight - chain amines show poor stability in solvents such as water and alcohol.

«Novel capping strategy improves stability of perovskite nanocrystals: Study addresses instability issues with organometal - halide perovskites, a promising class of materials for solar cells, LEDs, and other applications.»

A City College of New York led - team has successfully demonstrated how to both enhance light emission and capture light from metamaterials embedded with light emitting nanocrystals.

Nanocrystals selectively infused, or «doped», with rare - earth ions have attracted the attention of researchers, because of their low toxicity and ability to convert low - energy laser light into violet - colored luminescence emissions — a process known as photon upconversion.

Experiments revealed that the isolated Yb «energy clusters» inside this pill - shaped nanocrystal (see image) enabled substantially higher dopant concentrations than usual — Yb accounted for up to 98 per cent of the crystal's mass — and helped initiate multiphoton upconversion that yielded violet light with an intensity eight times higher than previously seen.

The material was synthesized by exploiting the structural evolution of platinum - nickel (Pt - Ni) bimetallic nanocrystals into cage - like structures with a self - assembled Pt skin structure on the interior and exterior surfaces.

This light stimulates dyes made with nanocrystals of rare earth elements — a family of 17 similar metals that are not scarce but are difficult to mine.

The best defence against being tagged with nanocrystals sprayed by drones controlled by border guards, police or the army (24...

This combined nanocrystals - nanoantenna device was able to produce a highly directional stream of single photons all flying to the same direction with a record low divergence angle.

«The atoms are in a very specific location within the nanocrystal core and when you apply the shell around the nanocrystal, the atoms of the shell may not match perfectly with the atoms of the core,» Smith said.

Semiconductor nanocrystals, or quantum dots, are tiny, nanometer - sized particles with the ability to absorb light and re-emit it with well - defined colors.

The other facet of the nanocrystal, with both lead and sulfur exposed, was bare of ligands.

These findings have been reported in a Science paper titled «Hydroxylation of the Surface of PbS Nanocrystals Passivated with Oleic Acid.»

Calculated atomic structure of a 5nm diameter nanocrystal passivated with oleate and hydroxyl ligands.

To achieve this, he used a nanocrystal sample produced from lead chloride instead of lead oxide, such that there was no way for water to be generated in the reaction with oleic acid.

Small organic fluorescent dyes, nanocrystals («quantum dots»), autofluorescent proteins, small genetic encoded tags that can be complexed with fluorochromes, and combinations of these probes are highlighted.

Their tests with transmission electron microscopy on the nanocrystals, which form as ultrathin films, plates and tiny particles, reveal the desired quality and uniformity.

Together with colleagues from Forschungszentrum Jülich, the University of Edinburgh and the University of Nottingham, Almeida has studied the magnetic vortices in magnetite nanocrystals.

Empa researchers Gilberto Siqueira and Tanja Zimmermann from the Laboratory for Applied Wood Materials have now succeeded, together with colleagues from Harvard University and ETH Zürich, in developing a new, environmentally friendly 3D printing ink made from cellulose nanocrystals (CNC).

Earlier techniques for producing polymeric micelles with linear block co-polymers have been limited by the stability of the structures and by the consistency of the nanocrystals they produce, Lin said.

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 quantum dots made of nanocrystals like those already being used in fundamental research.

«In nanocrystals, the gap changes with their size — the smaller the size, the larger the gap,» says physicist Victor Klimov of Los Alamos National Laboratory in New Mexico.

Nanocrystal lasers might be cheaper, more efficient and versatile compared with today's kind, Krauss says, perhaps leading to chemical sensors or optical communications devices capable of rapidly switching between laser colors.

In the new report published in Nature Materials, the Los Alamos team demonstrates that using their «designer» quantum dots, they can achieve light amplification in a nanocrystal solid with direct - current electrical pumping.

The particles, which are invisible to the naked eye, contain colored stripes of nanocrystals that glow brightly when lit up with near - infrared light.

Recently, his group has developed a number of high - performance electrocatalysts made with non-precious metal oxide or nanocrystals hybridized with carbon nanotubes.

Two papers with among the longest titles found in the journal that year, «The role of particle morphology in interfacial energy transfer in CDSE / CDS heterostructure nanocrystals» and «Insects betray themselves in nature to predators by rapid isomerization of green leaf volatiles,» have 68 and 67 citations, respectively.

«The direct growth of anchored MoSoy nanocrystals on graphene sheets may enhance the formation of strongly coupled hybrid materials with intimate, seamless electron transfer pathways, thus accelerating the electron transfer rate for the chemical desorption of hydrogen from the catalyst, further reducing the energy required for the reaction to take place,» Sasaki said.

The collaboration with high - tech startup company ThermoAura, focusing on nanocrystal synthesis, also contributed to the success of this work.

Researchers at the U.S. Naval Research Laboratory (NRL) Center for Computational Materials Science, working with an international team of physicists, have revealed that nanocrystals made of cesium lead halide perovskites (CsPbX3), is the first discovered material which the ground exciton state is «bright,» making it an attractive candidate for more efficient solid - state lasers and light emitting diodes (LEDs).

Visualization and quantitation of peroxisomes using fluorescent nanocrystals: treatment of rats and monkeys with fibrates and detection in the liver.

Now, Rosso and teams at PNNL, EMSL, the Environmental Molecular Sciences Laboratory, a DOE Office of Science User Facility at PNNL, and the University of Pittsburgh developed a new approach by combining an environmental transmission electron microscope, called an ETEM, with nanocrystal force probes that allows scientists to watch crystals interact in a life - like situation.

A nanocrystal can be doped with 5,000 to 10,000 impurities so it emits a certain color in the near - infrared with a very narrow spectral peak.

They discovered that by coating blue LEDs with a layer of nanocrystals specially engineered to turn the blue light into warm white, they could produce light at efficiency of over 300 lumens of visible light per watt.