Sunday, December 26, 2010

Scientists developed most hard organic synthetic materials as so far

Yi Hu Jia Jite (EhudGazit), Yitai flexible cable (ItayRousso) as well as a group, they come from Tel Aviv University (TelAvivUniversity), Weitzman Sciences (WeizmannInstituteofScience) and the Israeli Negev (Negev) in the Jia Ruian University (Ben-GurionUniversity), introduce them to organic nano-ball hard like metal. Scientists in Germany, "Applied Chemistry" (AngewandteChemie) magazine reported that they are some interesting elements, can be made of ultra-hardness of the biological synthesis of materials.
 
Nano-scale biological structures often have unique mechanical properties; for example, spider silk the same weight 25 times the strength of steel. So far the hardest known material is poly aromatic organic synthesis amide (aramids), for example, Kevlar fibers (Kevlar). The secret is its aromatic ring (aromaticring) system, a special kind of spatial layout, and the plane amide bond (amidebond) the interaction between the networks. The new nanoparticles are based on a principle similar to the composition. However, unlike the large polymer chains (polymericchains), they were formed in a self-organizing process, resulting in a very simple molecule, is based on the aromatic dipeptide (aromaticdipeptides) phenylalanine (aminoacidphenylalanine).
Using atomic force microscope, the scientists examined the mechanical properties of nanoparticles. The device uses a nano-tip (cantilever), which is a tiny flexible lever arm, the end of a very sharp tip. When the needle stabbing of a sample, the hanging rod deflection angle can show that the tip can pierce the sample objects, can penetrate the number.

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