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Researchers Rediscover the Structure of Water
Ribbon Cutting for the LCLS Far Experimental Hall
Tuesday - February 23, 2010 |
Researchers Rediscover the Structure of WaterA team of researchers at the Stanford Synchrotron Radiation Lightsource has found the molecular structure of water to be more complex than recently thought, suggesting that molecular models that went out of fashion decades ago may be in fact more accurate than recent ones. "The study of water has a very long history," said lead author Ling Fu, who is a postdoc at the Centre National de la Recherche Scientifique in France and who wrote her PhD thesis on these results. "Other researchers have done a very good job in their measurements; I hope that this work helps advance the field." By recording how SSRL's X-ray beam scattered off a flowing jet of water, Fu and colleagues Arthur Bienenstock and Sean Brennan were able to determine the distances between the water molecules in the jet. As recent models predicted, they saw molecules 0.28 and 0.45 nanometers apart. These measurements confirm the current commonly accepted model, which describes liquid water as a group of water molecules held together in tetrahedral shapes, with the molecule at the center of the tetrahedron separated from four others at the shorter distance and each of these four molecules separated from one another at the longer distance. Read more... Ribbon Cutting for the
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