Sentences with phrase «gold atoms»

Methods: Diphenylphosphine ligands, which consist of two phenyl (C6H5) substituted phosphorus centers separated by a carbon chain of variable length, produce gold clusters with extremely narrow distributions in size; that is, the synthesis route produces a large quantity of clusters with the same number of gold atoms as well as a small number of clusters with similar numbers of atoms.

The reaction transfers electrons from the reducing agent to the chloroauric acid, liberating gold atoms in the process.

In addition, gold clusters with the phenyl - containing ligand fragmented through a wide range of dissociation channels involving the loss of gold atoms as well as activation of the phosphorus - carbon bonds of the ligands.

The catalysts are composed of a unique structure of single gold atoms bound by oxygen to several sodium or potassium atoms and supported on non-reactive silica materials.

Particles containing 102 gold atoms bound to 44 organosulfur molecules can be grown uniformly, allowing x-ray resolution of their pure gold core and chiral structure.

The Brookhaven experiments smashed nuclei of gold atoms together to probe the same questions as ALICE.

These are rows of individual gold atoms twisted around a central axis — like a wire spring — which measure 0.6 nanometres wide by 5 nm long.

The first, led by Shunji Kishimoto of KEK, Japan's High - Energy Accelerator Research Organization in Tsukuba, fired short, intense x-ray pulses at gold atoms.

The molecules do not react with gold atoms, but instead order themselves in a two - dimensional chessboard pattern consisting of alternating iron and manganese - based molecules.

The laser stripped electrons from gold atoms to create a short - lived plasma cloud.

To mimic the conditions of the early universe, researchers sent electrically charged gold atoms racing along the collider's 2.4 - mile - long tunnel at near light speed, producing a fireball 150,000 times as hot as the center of the sun.

The just published research describes how single gold atoms dispersed on non-reactive supports based on silica materials can be stabilized with alkali ions.

They found that annealing air temperatures far below the melting temperature of gold caused gold atoms to move along surface steps back into the dents, refilling them almost completely.

One by one the larger gold atoms displace the smaller atoms of free silver on the surface, creating more contrast.

The surprising magnitude of this effect is explained by extrinsic scattering on excess gold atoms, as deduced from calculations done by Libor Šmejkal, who in the framework of a collaboration with the Czech Academy of Sciences is currently conducting his PhD project in the group of Professor Jairo Sinova at Mainz University.

Until the first gold atoms started making their 13 - microsecond laps around RHIC's 2.4 - mile - long perimeter, physicists thought they had a pretty good idea of what to expect from the collisions.

Particles with eight gold atoms wrapped with six ligands or phosphorus - based strands proved exceptionally stable in part because the ligands tightly bind to the gold core.

He then tuned the mass spectrometer to select the desired clusters: the 11 gold atom ions.

Analyzing the thousands of particles produced by colliding 2 gold atoms together at nearly the speed of light and trying to observe tiny deviations from what one expects is a fascinating, difficult problem.

Atomic electromagnets made from coils of individual gold atoms could prove valuable for nanocircuits and machines, a new study suggests.

Johnson and members of Laskin's team are now studying how the structure of these small clusters changes when different numbers of gold atoms are used to form the cluster.

As long as the gold atoms, or cations, are stabilized in a single - site form configuration, irrespective of the type of support, the precious metal will be stable and operate for many hours at a range of practical temperatures.

Video description: The video shows how, in molecular dynamics simulation, heating of the deformation first applied (dent) produces random movements of the gold atoms (so - called diffusion) slowly healing back into the original shape.

The rods are comprised of a small collection of gold atoms — nano refers to something being just billionths of meters (or feet) in size.

Depending on how the gold atoms then clump together, they can form nano - size beads, wires, rods, prisms and more.

The central gold atoms are packed in a Marks decahedron, surrounded by additional layers of gold atoms in unanticipated geometries.

Here we report the crystallization and x-ray structure determination of a p - mercaptobenzoic acid (p - MBA)-- protected gold nanoparticle, which comprises 102 gold atoms and 44 p - MBAs.

Unlike most accelerators, which smash together simple particles like individual protons, RHIC accelerates clusters of hundreds of gold atoms — with 79 protons and neutrons in each gold nucleus — to 99.99 percent the speed of light.

The researchers studied a previously identified molecularly precise nanocluster that has 102 gold atoms and 44 thiol ligands (Figure 1, right).

The researchers studied a previously identified molecularly precise nanocluster that has 102 gold atoms and 44 thiol ligands (see image, right).

The smallest particles have metal cores of only 1 - 2 nm with a few tens to a couple of hundred gold atoms.

After Binnig and Rohrer managed to image individual silicon and gold atoms (this image is just one of many they produced), the technique was proven to work.

Using the ion soft - landing technique developed at PNNL, the scientists prepared a homogeneous, contaminant - free sample of gold clusters, tiny particles made up of 11 gold atoms each.

The team showed that a cluster containing 8 gold atoms and 6 ligands is exceptionally stable compared to other clusters.

Through more symmetrical fission, with two fragments having nearly the same number of gold atoms and ligands.

For example, how does the structure change when 8 gold atoms are present in the cluster versus 6?

The clusters had 7, 8 or 9 gold atoms and 6 or 7 triphenylphosphine ligands.

In contrast, clusters prepared using the cyclohexane ligand contained 9 gold atoms.

They found that clusters synthesized using the phenyl ligand contained predominantly 11 gold atoms.

The team analyzed the composition of the solution including the number of gold atoms and ligands in each cluster using the mass spectrometer.

They contain exactly 11 gold atoms.

RAMIREZ - RUIZ: We have some gold atoms in our bodies, too.

Because just one of these neutron star mergers produced so much gold, probably all of the gold atoms that are in the four of us in this roundtable discussion came from the same event.

But even with something as powerful as the core of a star there were some atoms that were a little bit more slippery; we couldn't quite figure out how you get the energy needed to make something really big like a gold atom.