Sentences with phrase «in nanocrystals»

Taking Hell's work in super-resolution microscopy a step further, Chu discussed his use of rare earths embedded in nanocrystals to replace fluorescent organic dyes.

The local concentrations of elements obtained through APT were then used in mass balances (quantifying the glass formers in nanocrystals, enrichment of glass formers, and depletion of iron and cobalt in the amorphous phase).

For example, he co-invented a widely used technique for locating impurity atoms in nanocrystals and published the first observation of dislocation kinks, at atomic resolution.

«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.

«Weak magnetic fields in nanocrystals don't just play a role in paleomagnetism.

In the nanocrystals, which range from two to 150 nanometers wide, only two electrons per crystal may hop between energy rungs.

This quenching probably arises from the long - range migration of laser - excited energy states from Yb and toward defects in the nanocrystal.

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.

His research has significantly advanced our understanding of how the collective interactions in nanocrystal super lattices affect their electronic, optical, magnetic and thermoelectric properties.

Not exact matches

In particular, the infrared shielding performance of our small antimony - doped tin oxide nanocrystals is twice that of larger commercial antimony - doped tin oxide powders.»

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 sizIn 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 sizin 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.

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

Researchers at UC Santa Cruz attacked this problem by focusing on perovskite nanocrystals, in which the instability problems are magnified by the large surface area of the particles relative to their volume.

To stop nanocrystals getting stuck in tight spots, scientists have been sorting through the tiny tubes to weed out imperfect versions.

The peculiar locomotion could also help grow layered nanocrystals, which are used in electronics and drug delivery, says team member Alex Zettl, also at Berkeley.

«Our hope is that this could be used not only for perovskite nanocrystals but also for bulk materials and thin films used in applications such as photovoltaics.»

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.

When the team brought the nanocrystals close to an alkaline phosphate - catalyzed reaction, they saw the violet emissions diminish in direct proportion to a chemical indicator produced by the enzyme.

Colvin points out that the SMU researchers didn't isolate nanocrystals from the brains of fish to show that they were in fact the cause of the damage.

This effect, called structural color, has also been found in chameleons that can «tune» nanocrystals in their skin to change color the way tuning a guitar changes its pitch, as reported in 2015 in Nature Communications.

Using tiny nanocrystals made of semiconducting materials, the scientists developed a method in which a single nanocrystal can be accurately positioned on top of a specially designed and carefully fabricated nano - antenna.

In the same way large antennas on rooftops direct emission of classical radio waves for cellular and satellite transmissions, the nano - antenna efficiently directed the single photons emitted from the nanocrystals into a well - defined direction in spacIn the same way large antennas on rooftops direct emission of classical radio waves for cellular and satellite transmissions, the nano - antenna efficiently directed the single photons emitted from the nanocrystals into a well - defined direction in spacin space.

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 team demonstrated that this hybrid device enhances the collection efficiency of single photons by more than a factor of 10 compared to a single nanocrystal without the antenna, without the need for complex and bulky optical collection systems used in many other experiments.

«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.

Prospects have become even more appealing after a publication, entitled «Band structure engineering via piezoelectric fields in strained anisotropic CdSe / CdS nanocrystals,» was published in the journal Nature Communications last July.

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

Danylo Zherebetskyy and his colleagues at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) found unexpected traces of water in semiconducting nanocrystals.

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.

Reaction setup for the nanocrystal synthesis in the presence of star - shaped block - co-polymer as nanoreactor.

This design is modeled after nanocrystals embedded in chameleon skin, which also reflect different colors of light when stretched (SN Online: 3/13/15).

Empa researchers have succeeded in developing an environmentally friendly ink for 3D printing based on cellulose nanocrystals.

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).

Researchers in China have developed tiny nanocrystals that could be used in the next generation of medical imaging technologies to light up cancer cells.

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 this case, each polymer stream contains nanocrystals that emit different colors, allowing the researchers to form striped particles.

In a breakthrough development, Los Alamos scientists have shown that they can successfully amplify light using electrically excited films of the chemically synthesized semiconductor nanocrystals known as quantum dots.

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 use of these upconverting nanocrystals is quite clever and highly enabling,» says Jennifer Lewis, a professor of biologically inspired engineering at Harvard University who was not involved in the research.

Dragomir Neshev at the Australian National University in Canberra and his colleagues have shown that the nanocrystals can emit the absorbed infrared energy within the visible spectrum — a property called second harmonic generation.

Vela said variations in synthesis — changing reaction temperature and time, choice of metal ion precursors, adding certain ligands — allows the chemists to control the material's structure and the size of its nanocrystals.

In work led by professor Yanliang Zhang at Boise State University, high - performance and low - cost flexible thermoelectric films and devices were fabricated by an innovative screen - printing process that allows for direct conversion of nanocrystals into flexible thermoelectric devices.

The precise control of the starting nanocrystals» shape and surface chemistry and the optimization of the nano - ink and screen - printing process are the key factors giving rise to unprecedented performances in the printed thermoelectric materials.

«Laser Refrigeration of Hydrothermal Nanocrystals in Physiological Media.»

Synthesis of Luminescent Near - Infrared AgInS2 Nanocrystals as Optical Probes for In Vivo Applications Liwei Liu, Rui Hu, Indrajit Roy, Guimiao Lin, Ling Ye, Jessica L. Reynolds, Jianwei Liu, Jing Liu, Stanley A. Schwartz, Xihe Zhang, Ken - Tye Yong Theranostics 2013; 3 (2): 109 - 115.

Researchers at Berkeley Lab have developed a new materials recipe for a battery - like hydrogen fuel cell that shields the nanocrystals from oxygen, moisture, and contaminants while pushing its performance forward in key areas.

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.

We all have access to oils and water and nanocrystals, allowing broad tunability in bijel properties.