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ASTM revises nanotechnology standard E2490

A revision to an important ASTM nanotechnology standard incorporates a large-scale interlaboratory study that took place in 2008. The revised standard, ASTM E2490, Guide for Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS), is under the jurisdiction of Subcommittee E56.02 on Characterization: Physical, Chemical and Toxicological Properties, part of ASTM International Committee E56 on Nanotechnology.

Jul 30th, 2009

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Growing flying carpets with carbon nanotubes

Scientistst at Rice describe a method for making odako, bundles of single-walled carbon nanotubes named for the traditional Japanese kites they resemble. It may lead to a way to produce meter-long strands of nanotubes, which by themselves are no wider than a piece of DNA.

Jul 29th, 2009

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New microbe strain makes more electricity, faster

Researchers have coaxed Geobacter, the sediment-loving microbe who produce electric current from mud and wastewater, to evolve a new strain. It dramatically increases power output per cell, overall bulk power, and with a thinner biofilm, cuts the time to produce electricity on the electrode.

Jul 29th, 2009

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