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Latest Hydrogen bond Stories

Does Water Always Completely Wet Water?
2014-07-16 03:09:31

Science China Press The molecular scale behavior of water at a solid/liquid interface holds fundamental significance in a diverse set of technical and scientific contexts, ranging from the efficiency of oil mining to the activity of biological molecules. Recently, it has become recognized that both the physical interactions and the surface morphology have significant impact on the behavior of interfacial water, including the water structures and wetting properties of the surface. In a...

2014-04-07 16:12:11

A combined computational and experimental study of self-assembled silver-based structures known as superlattices has revealed an unusual and unexpected behavior: arrays of gear-like molecular-scale machines that rotate in unison when pressure is applied to them. Computational and experimental studies show that the superlattice structures, which are self-assembled from smaller clusters of silver nanoparticles and organic protecting molecules, form in layers with the hydrogen bonds between...

Scientists Discover How Explosives Respond To Shockwaves
2013-12-12 15:49:37

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory researchers have combined ultrafast time-resolved experimental measurements with theory to reveal how an explosive responds to a high-impact shock. The work involved advances in both ultrafast experimental shockwave methods and molecular dynamics (MD) simulation techniques, and the combination of experiment and simulation is a milestone in understanding chemical initiation and detonation. When an energetic...

One Chemical, Two Colors Of Crystals, Sheds Insight On Agostic Bonds Important In Industrial Catalysis
2013-08-04 07:48:34

DOE/Pacific Northwest National Laboratory Chemists have unexpectedly made two differently colored crystals -- one orange, the other blue -- from one chemical in the same flask while studying a special kind of molecular connection called an agostic bond. The discovery, reported in Angewandte Chemie International Edition on July 29, is providing new insights into important industrial chemical reactions such as those that occur while making plastics and fuels. "We were studying agostic...

H2O Reveals New Secret
2013-06-11 10:08:48

Carnegie Institution Using revolutionary new techniques, a team led by Carnegie's Malcolm Guthrie has made a striking discovery about how ice behaves under pressure, changing ideas that date back almost 50 years. Their findings could alter our understanding of how the water molecule responds to conditions found deep within planets and could have implications for energy science. Their work is published in the Proceedings of the National Academy of Sciences. When water freezes into ice,...

Buckyball Manipulated By Inserting A Single Water Molecule
2013-05-06 10:26:08

Columbia University Nanoscale technology used to drive a 'big' C60 through a 'small' H2O may help drug delivery Columbia Engineering researchers have developed a technique to isolate a single water molecule inside a buckyball, or C60, and to drive motion of the so-called "big" nonpolar ball through the encapsulated "small" polar H2O molecule, a controlling transport mechanism in a nanochannel under an external electric field. They expect this method will lead to an array of new...

Researchers Reconfirm Original Tetrahedral Model Of Water Molecules
2013-02-13 04:45:42

Lee Rannals for redOrbit.com - Your Universe Online For all those who worried back in 2004 that the sky was falling because the original model of the molecular structure of water toppled out, have no fear, because things can go back to the way they used to be. Johannes Gutenberg University Mainz (JGU) researchers confirmed the original tetrahedral model, after an international research group challenged the model nine-years ago, claiming that water molecules form bonds only with two...

Glaciers Cracking In Presence Of Carbon Dioxide
2012-10-11 19:48:46

Alan McStravick for redOrbit.com — Your Universe Online Our glaciers and ice caps are experiencing a little chemistry-based “good cop, bad cop” and it looks like the bad cop is going to make them crack under pressure. There is little doubt in the scientific community about the excessive presence at startling levels of carbon dioxide (CO2) in our atmosphere and the effect it is having on our increasing global temperatures and our melting ice caps and glaciers....

2012-09-19 15:19:49

A new model provides an alternative description of atomic level gold bonding A study on how gold atoms bond to other atoms using a model that takes into account bonds direction has been carried out by physicist Marie Backman from the University of Helsinki, Finland, and colleagues. These findings, which are about to be published in EPJ B, are a first step toward better understanding how gold binds to other materials through strong, so-called covalent, bonds. What scientists need is an...

2012-06-20 19:13:41

A team of chemists at the University of Geneva have finally demonstrated the utility of the rare halogen bond which acts as a anions transporter Professor Stefan Matile does not mention whether, as a child, he was a big fan of Lego. However, as an adult, he is fascinated by the game of molecular construction. Using the rules of chemistry, it is possible to artificially assemble all kinds of molecules and even nanomachines. However, chemists in this area feel their creativity constrained...


Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'