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Latest Quantum chemistry Stories

2010-12-23 17:50:35

UA scientists have inserted metal atoms into methane gas molecules -- a potential advancement for industrial hydrocarbon chemistry and our understanding of how nature uses metals in the molecules of living organisms For the first time, chemists have succeeded in plugging a metal atom into a methane gas molecule, thereby creating a new compound that could be a key in opening up new production processes for the chemical industry, especially for the synthesis of organic compounds, which in turn...

2010-10-08 14:35:50

An approach pioneered by researchers at North Carolina State University gives scientists new insight into the way silicon bonds with other materials at the atomic level. This technique could lead to improved understanding of and control over bond formation at the atomic level, and opportunities for the creation of new devices and more efficient microchips. Manufacturers build silicon-based devices from layers of different materials. Bonds "“ the chemical interaction between adjacent...

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2010-08-05 09:24:34

An international team of scientists led by groups from the Max Planck Institute of Quantum Optics (MPQ) in Garching, Germany, and from the U.S. Department of Energy's Lawrence Berkeley National Laboratory and the University of California at Berkeley has used ultrashort flashes of laser light to directly observe the movement of an atom's outer electrons for the first time. Through a process called attosecond absorption spectroscopy, researchers were able to time the oscillations between...

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2010-06-25 09:10:47

When light is absorbed by atoms, the electrons become excited. If the light particles, so-called photons, carry sufficient energy, the electrons can be ejected from the atom. This effect is known as photoemission and was explained by Einstein more than hundred years ago. Until now, it has been assumed that the electron start moving out of the atom immediately after the impact of the photon. This point in time can be detected and has so far been considered as coincident with the arrival time...

2010-02-11 16:11:48

Physicists at JILA have for the first time observed chemical reactions near absolute zero, demonstrating that chemistry is possible at ultralow temperatures and that reaction rates can be controlled using quantum mechanics, the peculiar rules of submicroscopic physics. The new results and techniques, described in the Feb. 12 issue of Science,* will help scientists understand previously unknown aspects of how molecules interact, a key to advancing biology, creating new materials, producing...

2010-01-10 14:10:50

Groundbreaking approach could impact fields from cryptography to materials science In an important first for a promising new technology, scientists have used a quantum computer to calculate the precise energy of molecular hydrogen. This groundbreaking approach to molecular simulations could have profound implications not just for quantum chemistry, but also for a range of fields from cryptography to materials science. "One of the most important problems for many theoretical chemists is how to...

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2009-12-29 08:49:40

Research gives new perspective on periodic table Transforming lead into gold is an impossible feat, but a similar type of "alchemy" is not only possible, but cost-effective too. Three Penn State researchers have shown that certain combinations of elemental atoms have electronic signatures that mimic the electronic signatures of other elements. According to the team's leader A. Welford Castleman Jr., Eberly Distinguished Chair in Science and Evan Pugh Professor in the Departments of Chemistry...

2009-12-05 14:37:49

Some atoms don't always follow the rules. Take the beryllium dimer, a seemingly simple molecule made up of two atoms that University of Delaware physicists Krzysztof Szalewicz and Konrad Patkowski and colleague Vladimír Spirko of the Academy of Sciences of the Czech Republic report on in the Dec. 4 edition of the journal Science. Beryllium is a strong, hard, toxic metal found naturally in minerals such as emeralds and commonly used as an alloy with other metals in many...

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2009-09-14 12:50:46

Physicists get a grip on slippery molecules, and learn how the shape of nanoscopic magnetic islands affect data storage Molecules of hydrogen are difficult to steer with electric fields because of the symmetrical way that charges are distributed within them. But now researchers at ETH Zurich have found a clever technique to get a grip on the molecules. Their findings are reported in Physical Review Letters and highlighted in the September 14 issue of Physics. Electric fields can easily...

2009-02-06 08:48:48

Scientists at the Naval Research Laboratory (NRL) have recently demonstrated the ability to control the spin population of the individual quantum shell states of self-assembled indium arsenide (InAs) quantum dots (QDs). These results are significant in the understanding of QD behavior and scientists' ability to utilize QDs in active devices or for information processing. The scientists, from NRL's Materials Science and Technology Division, used a spin-polarized bias current from an iron (Fe)...


Latest Quantum chemistry Reference Libraries

International Journal of Quantum Chemistry
2012-07-13 15:02:28

The International Journal of Quantum Chemistry is a peer-reviewed scientific journal established in 1967 by Per-Olov Lowdin. The journal moved to an in-house editorial office model in 2011, enlisting a permanent team of professional editors. It publishes original, primary research and review articles on all aspects of quantum chemistry, including an expanded scope focusing on aspects of materials science, biochemistry, biophysics, quantum physics, and quantum information theory. Image...

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Word of the Day
conjunto
  • A style of popular dance music originating along the border between Texas and Mexico, characterized by the use of accordion, drums, and 12-string bass guitar and traditionally based on polka, waltz, and bolero rhythms.
The word 'conjunto' comes through Spanish, from Latin coniūnctus, past participle of coniungere, to join together; see conjoin