Sentences with phrase «mosoy nanocrystals»

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

«It is remarkable that the composition and supramolecular organization of keratins can control PbS [lead - sulfide] nanocrystal growth inside a hair,» the group writes.

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.»

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.

«Scientists Pinpoint the Creeping Nanocrystals Behind Lithium - Ion Battery Degradation.»

Professor Shangchao Lin, who led the research at Florida State University, said: «Our findings also show that the perovskite nanocrystals emit light extremely quickly and are very energy efficient.

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.

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

Olaf Walter, Karin Popa and Oliver Dieste Blanco, have devised a simple access to produce highly crystalline, reactive actinide oxide nanocrystals.

The researchers were able to control the size of the nanocrystals by adjusting the amount of branched capping ligands used during synthesis.

The metal nanocrystals have been glimpsed reshaping themselves to squeeze through tight spaces, without melting or compressing.

«The branching molecules are more cone - shaped, which increases steric hindrance and makes it harder for the solvent to access the surface of the nanocrystals,» he said.

«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.»

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.

Atoms on the surface are vulnerable to reactions that can degrade the material, so molecules that bind to the surface — called surface ligands or capping ligands — are used both to stabilize perovskite nanocrystals and to control their properties.

He says the current is probably pulling the individual atoms along electrostatically, and that this may be how nanocrystals move through all nanotubes.

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.

These so - called nanocrystal quantum dots, however, have a coating of organic molecules that tends to block out the electrons needed to stimulate the dots.

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.

According to Zhang, the branching structure of the ligands protects the surface of the nanocrystals by occupying more space than straight - chain molecules, creating a mechanical barrier through an effect known as steric hindrance.

«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.»

Ultra-thin nanocrystal films convert infrared into visible light — and could be incorporated into standard glasses

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.

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.

«We believe that the fundamental aspects of these findings — that crystal structures can greatly influence luminescence properties — could allow upconversion nanocrystals to eventually outperform conventional fluorescent biomarkers,» says Liu.

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.

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

«Biomanufacturing of CdS quantum dots: A bacterial method for the low - cost, environmentally - friendly synthesis of aqueous soluble quantum dot nanocrystals.»

Using their technique, the researchers have so far fabricated uniform metallic, ferroelectric, upconversion, semiconducting and thermoelectric nanocrystals, as well as combinations thereof.

Although it's unclear just how the damage occurs, one possibility is that the buckyball nanocrystals enter the brain via olfactory neurons, a route traveled by other small particles.

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.

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.

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

A team of researchers has synthesized a highly active and durable class of electrocatalysts by exploiting the structural evolution of solid Pt - Ni bimetallic nanocrystals into porous cage - like structures or nanoframes.

Cerium oxide nanocrystals have the ability to absorb and release oxygen ions — a chemical reaction known as reduction oxidation, or redox, for short.

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.

A team of researchers from Argonne National Laboratory, Lawrence Berkeley National Laboratory, and the University of Wisconsin synthesized a highly active and durable class of electrocatalysts by exploiting the structural evolution of solid Pt - Ni bimetallic nanocrystals into porous cage - like structures or nanoframes.

The nanocrystals allow the diagnostic nanorods to be shipped and stored without refrigeration prior to use.

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.

«It could have significant implications for the way plants are bred or selected for improved or altered cellulose ultrastructural traits — which could impact industries ranging from cellulose nanocrystals to toiletries to structural building products.»

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.

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.

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

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 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.

Polymeric carbon nitrides are organic compounds synthesized to form a yellow powder of a myriad of nanocrystals.

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.