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Archive for November, 2011

Darpa seeks nanotechnology defense against novel pathogens

Posted by Jim Lewis on November 30th, 2011

To counter the threat of evolved or engineered resistance of pathogenic bacteria to antibiotics, Darpa proposes to use nanotechnology to develop “Rapidly Adaptable Nanotherapeutics”.

Will new piezoelectric materials lead to new tools for nanotechnology?

Posted by Jim Lewis on November 27th, 2011

Will the integration of a single-crystal material with “giant” piezoelectric properties onto silicon make possible scanning probe microscopes on a chip?

Geometry of DNA nanostructures used to program molecular recognition

Posted by Jim Lewis on November 25th, 2011

Adding a new molecular recognition code to structural DNA nanotechnology—a pattern of projecting and recessed blunt-end DNA helices can be used to code the assembly of DNA origami tiles into larger DNA nanostructures.

DNA nanosensors profile gene activity to reveal state of cells

Posted by Jim Lewis on November 18th, 2011

Small DNA molecules fluoresce in the presence of specific transcription factors, sensing which genes are being expressed in that cell, potentially allowing cancer treatments to be personalized, and the quality of stem cells to be monitored.

Leveraging nanoforces to increase biosensor sensitivity

Posted by Jim Lewis on November 16th, 2011

This contribution has been forwarded by Ivo Rivetta. The primary forces on the nanometer scale are scaled versions of what we experience on a day to day basis. Instead of gravity, surface forces such as water tension and electric charge dominate. As an example, compare wet basketballs and wet sand. The weight of the basketballs [...]

Single molecule nanocar with functional wheels driven by electron tunneling

Posted by Jim Lewis on November 14th, 2011

Electron tunneling drives a conformational change in each wheel of a four-wheel drive, single molecule nanocar, driving it across a copper surface.

Humanoid robot for military showcases advances in robotics

Posted by Jim Lewis on November 7th, 2011

A prototype humanoid robot being developed for the US military mimics a wide range of human movements while retaining its balance.

An artificial molecular clock to control artificial molecular machines

Posted by Jim Lewis on November 4th, 2011

The oscillating synthesis and degradation of regulatory RNA molecules was used to produce a molecular clock to control the opening and closing of a DNA tweezers, and also to control the production of another RNA molecule to alter the fluorescence of a dye molecule.