Grab the Latest About Science and Technology
Posts tagged ‘nanotech’
Continue reading ‘NSTT – A Promising Tool for Properties Enhancement of Heat-Treated Steels’ »
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. Excerpts from “Cell ‘organs’ get plastic upgrades“, by Tamsin Osborne at NewScientist.com news service:
Human cells could have their metabolisms upgraded without altering their genes by inserting tiny plastic packages of enzymes, Swiss researchers have shown. They hope the technique could allow advanced cancer therapies, or even upgrade a person’s metabolism.
Continue reading ‘Artificial organelles: nanotechnology beyond simple drug delivery’ »
A major advantage of nanotech drug delivery is that multiple drug molecules can be combined on one nanoparticle so that one nanoparticle binds more strongly to the drug target than would the isolated drug molecules. Attaching 12 molecules of an HIV drug to a 2.0 nm diameter gold nanoparticle enabled the drug to prevent HIV infection in cultured patient cells. From a North Caroline State University News Release
“Failed HIV Drug Gets Second Chance with Addition of Gold Nanoparticles“:
Researchers at North Carolina State University have discovered that adding tiny bits of gold to a failed HIV drug rekindle the drug’s ability to stop the virus from invading the body’s immune system.
Continue reading ‘Nanotechnology combines multiple molecules of drug to prevent HIV infection’ »
In response to the electronics industry’s rallying cry of “smaller and faster,” the next breakthroughs in the electronics size barrier are likely to come from microchips and data storage devices created out of novel materials such as organic molecules and polymers. With innovative measurement techniques and new ways to position the molecules, NIST researchers reported at the March Meeting of the American Physical Society how they have improved manipulation of so-called block copolymers—polymers made of a mixture of two or more different molecule building blocks that are tethered at a junction point—which can form arrays of tiny dots that could be used as the basis for electronic components that pack terabytes (1000 gigabytes) of memory in something as small as a pack of gum.
One of the challenges in polymer nanotechnology is how to control their self-assembly—a hard-to-control process for materials which require precision. An important recent NIST accomplishment has been in developing accurate measurements of thin film polymeric nanostructure in 3-D. (Ironically, while determining atomic structure is well-established, measuring the slightly larger internal structure of the polymers—on the order of 10 to 20 nanometers—is much harder.) Ron Jones, together with colleagues from NIST, the University of Maryland and IBM, has used NIST’s neutron scattering and reflectivity facility to deflect neutrons off block copolymer films from many different angles. By combining the many 2-D neutron scattering pictures into a single composite scattering pattern, this technique provides the first quantitative method for imaging the 3-D internal structure of thin film polymeric nanostructures using neutron scattering—a crucial tool to see if the nanoscale polymer structures are in their required positions.
NIST researchers also have developed new insights on how best to nudge these self-assembling material into those positions. August Bosse will report on computer simulations that model how the polymers assemble when they are placed on templates lined with troughs separated by crests. When a heated zone is swept across the template, the polymer molecules assemble into almost defect free, well-aligned lines faster over the entire template, an important feature for nanotech manufacturing applications. Sangcheol Kim (working with a team that included researchers from the University of Maryland and IBM) has found that changing the surface chemistry of the template by making some parts hydrophillic and some parts hydrophobic also can elegantly control the dimension of the block-copolymer pattern relative to the chemical template.
Continue reading ‘Copolymers Block Out New Approaches To Microelectronics’ »
I’m in two minds about this story - impressed, because nanotechnology is cool and tiny robots are even cooler, but more than a little disturbed at the idea of killer robots flying around and zapping people in the neck. Reuters is reporting that Israel are developing a bionic hornet that could chase, photograph and eventually kill enemy combatants or terrorists. Able to navigate tightly confined areas and so small as to be difficult to target by traditional weaponry, the concept is expected to reach prototype stage within three years.
It’s uncertain as yet whether the robots would be remotely controlled or have some sort of AI, though a combination of both is perhaps most likely; general targeting by remote, while short-range sensors automatically manage obstacle avoidance, tracking and flight.
