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Nano sculptures in gold
Date:8/1/2008

ll vibration spectrum reveals the structure of a particle. "This means we have to repeat the experiment with around 200 different wavelengths of the infrared laser," says Andr Fielicke. That creates the next problem for the scientists: only a free electron laser delivers laser light that is sufficiently intense over most of the spectrum to make the clusters burst. The Berlin-based researchers therefore resolved the structure of the gold clusters on the Free Electron Laser for Infrared eXperiments - Felix - in Nieuwegein in the Netherlands. They reconstructed the vibration spectrum for certain clusters from the mass spectrometer readings at different wave lengths of the infrared laser, allowing them to see their structures.

With their investigations, the scientists in Berlin are helping in the search for a catalyst for epoxidization - a technically important reaction in which chemists attach hydrocarbon molecules to an oxygen atom. This is often the first step towards creating more complex molecules. Whether the end result yields the desired product depends on where the oxygen atom attaches itself to the hydrocarbon. And that's where the gold clusters come in - they could act as pilots.


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Contact: Dr. Andr Fielicke
fielicke@fhi-berlin.mpg.de
49-308-413-5622
Max-Planck-Gesellschaft
Source:Eurekalert  

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