Expanded DNA alphabet provides more options for nanotechnology

A bacterium has been engineered to stably propagate a DNA written with six letters instead of the usual four, greatly expanding the number of amino acids, both natural and synthetic, that can be genetically encoded. Further work could lead to novel proteins incorporating these additional amino acids, and from there to novel materials, devices, and machines.

Nanotechnology to provide efficient, inexpensive water desalination

Two different nanotechnology-based approaches to use graphene as the basis for purification and desalination of water look promising.

Nanotechnology to provide better solar cells, optical devices

A novel method to control the configuration of atoms in semiconductors grown on graphene will make possible a vast array of new optical devices, including better solar cells.

A bird’s-eye view of half a century of nanotechnology

Reviewing Eric Drexler’s Radical Abundance, Phil Bowermaster provides an informed and insightful overview of the controversies that greeted the proposal for a nanotechnology aimed at developing a practical technology for atomically precise manufacturing. Along the way he shows how Drexler’s outlook evolved from 1986 to 2013.

To fight inflammation nanoparticles turn ‘naughty’ neutrophils into ‘nice’ neutrophils

By targeting the protein that attaches a type of immune cell called neutrophils to blood vessel walls where they cause serious tissues damage, the neutrophils are released and returned to the circulation to resume their normal functions.

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