Monday, February 20, 2006

Tungsten Sulphide Nanotubes Reach Their Theoretical Strength

In general, materials cannot reach their theoretical strength because of the presence of defects. How about defect-free nanotubes? In a paper in PNAS, researchers at the Weizmann Institute of Science, Israel, and the Technical University of Dresden in Germany have performed both tensile and bulking experiments on individual tungsten sulphide nanotubes and found out that the tungsten sulphide nanotubes are as strong as theory predicts for materials without defects. The tubes exhibit a tensile strength close to 16 GPa. This finding may stimulate the applied mechanics community to explore the beauty of nanotubes and other nanomaterials from both experimental and theoretical approaches.


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