Foresight Institute Weekly News Digest: January 15, 2009
Discuss these news stories at http://foresight.org/nanodot.
DNA nanotech continues to improve the devices it produces as Oxford University scientists fix several shortcomings seen in earlier versions of bipedal DNA molecular walkers that had been produced by several laboratories…
Nanotech could make possible the controlled release within the patient of up to four different drugs by irradiation with different wavelengths of near-infrared radiation. Near-IR light passes through human flesh to release drugs within the body. In a proof-of-concept experiment, two different DNA oligonucleotides were loaded on gold nanorods of two different shapes…
The synthesis and characterization of molecules called cycloparaphenylenes, which are rings of (in this case) 9, 12, or 18 benzene molecules, could provide nanotech with an efficient way of producing armchair carbon nanotubes of pre-determined diameter…
For nanotech to meet the need for cheap solar cells to produce electricity, it would be very useful to increase the absorption of light by inexpensive thin-film cells, which use a layer of polycrystalline silicon only 1-2 micrometers thick instead of the more expensive 200-300 micrometer-thick crystalline silicon wafers used for conventional solar cells…
Optical tweezers have long been used to transport particles in the size range of micrometers to a few hundred nanometers. Now, in a significant step toward providing nanotech with useful 'lab on a chip' devices, researchers have used slot waveguides to condense light energy to scales as small as 60 nm allowing them to trap 75-nm polystyrene nanoparticles and DNA molecules and transport them optically…
—Nanodot posts by James Lewis
April 2, 2009
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