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67 Current news about the topic clusters

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Clusters of gold atoms form peculiar pyramidal shape

07-Jan-2020

Clusters composed of a few atoms tend to be spherical. They are usually organized in shells of atoms around a central atom. This is the case for many elements, but not for gold! Experiments and advanced computations have shown that freestanding clusters of twenty gold atoms take on a pyramidal ...

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'Butterfly-shaped' palladium subnano cluster built in 3-D

25-Feb-2019

Miniaturization is the watchword of progress. Nanoscience - building structures on the scale of a few atoms - has long been at the forefront of chemistry for some time now. Recently, researchers at The University of Tokyo developed the new strategy to construct the subnanosized metal aggregates, ...

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Powerful X-ray beams unlock secrets of nanoscale crystal formation

Technique allowed continuous study of cobalt nanoparticles as they grew

09-Jan-2019

High-energy X-ray beams and a clever experimental setup allowed researchers to watch a high-pressure, high-temperature chemical reaction to determine for the first time what controls formation of two different nanoscale crystalline structures in the metal cobalt. The technique allowed continuous ...

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New class of materials could revolutionize biomedical, alternative energy industries

30-Jan-2017

Polyhedral boranes, or clusters of boron atoms bound to hydrogen atoms, are transforming the biomedical industry. These manmade materials have become the basis for the creation of cancer therapies, enhanced drug delivery and new contrast agents needed for radioimaging and diagnosis. Now, a ...

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New insights into the forms of metal-organic frameworks

26-Jan-2017

The accurate interpretation of particle sizes and shapes in nanoporus materials is essential to understanding and optimizing the performance of porous materials used in many important existing and potentially new applications. However, only a few experimental techniques have been developed for ...

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Radiation that knocks electrons out and down, one after another

12-Dec-2016

Researchers at Japan's Tohoku University are investigating novel ways by which electrons are knocked out of matter. Their research could have implications for radiation therapy. Exposing a small cluster of neon atoms to a very short and intense burst of extreme ultraviolet light initiates a novel ...

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Chemical trickery corrals 'hyperactive' metal-oxide cluster

09-Dec-2016

After decades of eluding researchers because of chemical instability, key metal-oxide clusters have been isolated in water, a significant advance for growing the clusters with the impeccable control over atoms that's required to manufacture small features in electronic circuits. Oregon State ...

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How metal clusters grow

Basis for customized optoelectronic and magnetic materials

01-Mar-2016

First the nucleus, then the shell: Researchers from Marburg and Karlsruhe have studied stepwise formation of metal clusters, smallest fractions of metals in molecular form. The shell gradually forms around the inner atom rather than by later inclusion of the central atom. Knowledge of all ...

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New boron nanomaterial may be possible

29-Jan-2014

Graphene, a sheet of carbon one atom thick, may soon have a new nanomaterial partner. In the lab and on supercomputers, chemical engineers have determined that a unique arrangement of 36 boron atoms in a flat disc with a hexagonal hole in the middle may be the preferred building blocks for ...

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Newly discovered mechanism propels micromotors

Tiny clusters of particles zip forward, spin, or circle depending on their shape

17-Oct-2013

Scientists studying the behavior of platinum particles immersed in hydrogen peroxide may have discovered a new way to propel microscopic machines. Micro-sized machines operate under very different conditions than their macro-sized counterparts. The high surface-area-to-mass ratio of tiny motors ...

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