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Archive for June, 2008

Nanotechnology approach to drug delivery uses multifunctional nanoparticles to silence gene

Posted by Jim Lewis on June 30th, 2008

A major nanotech advance in engineering multifunctional nanoparticles for imaging and therapeutic applications combines a short RNA (siRNA) to “silence” a specific gene with quantum dots and a “proton sponge” polymer coating to get the siRNA into the cell and released into the right compartment of the cell.

Hybrid nanowires show promise as nanotechnology building blocks

Posted by Jim Lewis on June 27th, 2008

Millimeter-scale nanotech structures self-assembled from hybrid nanowires can sense and respond to external stimuli.

Must-see anti-aging event in LA this Friday

Posted by Christine Peterson on June 26th, 2008

To live long enough to experience some of the more dramatic applications of nanotechnology, you may need anti-aging treatments. For all of us with an interest in longevity, the place to be starting at 4 PM this Friday, June 27, is UCLA for Aging 2008: At Aging 2008 you will engage with top scientists and [...]

Tethered molecular switches as step toward actuators for nanotechnology

Posted by Jim Lewis on June 26th, 2008

Exposure to two different wavelengths of light can cause the azobenzene molecule to switch back and forth between two different shapes. This molecular shape-changing works well in solution but until now has not worked with molecules attached to surfaces. Now scientists from Penn State University and Rice University have found a way to make the [...]

Optical tweezers for nanotechnology

Posted by Jim Lewis on June 25th, 2008

A nanotech version of the optical tweezers traditionally used to manipulate micrometer-scale objects manipulates objects at the 200-nm scale.

Nanotechnology for inexpensive plastic memory

Posted by Jim Lewis on June 24th, 2008

A new concept for a very cheap plastic nanotech memory has been developed by combining the favorable properties of ferroelectrics and semiconductors.

Molecular clutch for bacterial flagellum may offer control mechanism for nanotechnology

Posted by Jim Lewis on June 23rd, 2008

The flagellum clutch mechanism may provide ideas useful for nanotech control of molecular motors.

Solar cell nanotechnology uses the right imperfections

Posted by Jim Lewis on June 20th, 2008

Carbon nanotubes with the proper imperfections were found to replace more problematic and expensive materials in dye-sensitized solar cells.

Using nanotechnology to attract cells to regenerate cartilage

Posted by Jim Lewis on June 19th, 2008

The combination of electrical stimulation and a nanotech surface composed of carbon nanotubes dispersed in polycarbonate urethane was found to attract cartilage-forming cells.

Nanotechnology engineers single molecules as nanorobots

Posted by Jim Lewis on June 18th, 2008

Chemists have designed molecules that act like nanotech sensing robots by signaling information about their chemical environment.

Nanotechnology offers nanowire ‘towels’ and designer ‘nanobatons’ to clean up oil spills

Posted by Jim Lewis on June 17th, 2008

Two different types of nanostructures have been reported as nanotech methods to clean up oil spills and other organic pollutants.

A molecule printer for nanotechnology based on spinning carbon nanotubes

Posted by Jim Lewis on June 16th, 2008

Atoms or molecules could be pumped through the spinning inner CNT to form patterns of atoms or molecules—a nanotech inkjet printer.

Stripes improve drug delivery using nanotechnology

Posted by Jim Lewis on June 13th, 2008

MIT scientists are discovering what controls the proper movement of nanoparticles into cells—the right kinds of molecules must be arranged in the right patterns.

Nanotechnology training for high school teachers now available

Posted by Jim Lewis on June 12th, 2008

An item from the June newsletter of the Innovation Society (based in St.Gallen, Switzerland) announces a training course for secondary school science teachers to help them develop a teaching syllabus on nanotech: Innovation Society introduces teachers’ training course “TEACH-NANO” As nanotechnology is coming into our daily lives it will also conquer schools in the near [...]

New measurements of charge dynamics of graphene may guide potential nanotechnology applications

Posted by Jim Lewis on June 11th, 2008

Very precise measurements confirmed many of the unusual effects theoretically predicted for graphene, but they also revealed effects of unanticipated additional interactions, which are not yet understood.

Nanotechnology controls crystal morphology for energy and environmental applications

Posted by Jim Lewis on June 10th, 2008

Researchers have developed a method of producing titanium oxide crystals with more reactive surfaces.

Which way(s) to advanced nanotechnology?

Posted by Jim Lewis on June 9th, 2008

Will nanotechnology culminate with diamondoid nanorobots produced in nanofactories by atomically precise mechanosynthesis, or with “soft” machines that mimic the way biological molecular machines work?

Light-controlled nanotech brake for molecular machine

Posted by Jim Lewis on June 6th, 2008

Taiwanese researchers have constructed a molecule in which exposure to light causes causes the molecule to change shape so that rotation of one part of the molecule with respect to another part can no longer occur.

Artificial organelles: nanotechnology beyond simple drug delivery

Posted by Jim Lewis on June 5th, 2008

The same nanotech approaches being explored to deliver drugs exactly to the cells where they are needed also provide a technology base that might lead to permanent enhancements of human metabolism.

Nanotechnology combines multiple molecules of drug to prevent HIV infection

Posted by Jim Lewis on June 4th, 2008

Attaching 12 molecules of an HIV drug to a gold nanoparticle enabled the drug to prevent HIV infection in cultured patient cells.