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Nanotechnology Spotlight

Behind the buzz and beyond the hype:
Our Nanowerk-exclusive feature articles

Showing Spotlights 1521 - 1528 of 1604 in category All (newest first):

 

3-dimensional nanowire networks make for ultrasensitive and highly selective gas sensors

The sensitivity of solid-state gas sensors can be improved if the surface-to-volume ratio of the material used for the sensor is increased. An international group of researchers demonstrated that three-dimensional tungsten oxide nanowire networks can serve as a high-surface area material for building ultrasensitive and highly selective gas sensors. The results highlight that the 3-D nanowires technology can be adopted for the development of gas sensors with performances suitable for practical applications.

Posted: Jun 8th, 2006

Controlled decoration of carbon nanotubes with nanoparticles

A newly developed electrostatic force directed assembly (ESFDA) technique is used to efficiently coat carbon nanotubes (CNTs) with nanoparticles. This new method advances the current technology by enabling rapid and in-situ coating of CNTs, multicomponent hybrid nanostructures, more control over the assembly process, and the possibility of tuning properties of the resulted hybrid structures.

Posted: Jun 7th, 2006

Researchers use nanoscale zinc oxide structures to detect anthrax

A new approach promotes the use of zinc oxide nanomaterials as signal enhancing platforms for rapid, multiplexed, high-throughput, highly sensitive, DNA sensor arrays. Engineered nanoscale ZnO structures can be effectively used for the identification of the biothreat agent, Bacillus anthracis, by successfully discriminating its DNA sequence from other genetically related species.

Posted: Jun 6th, 2006

NanoFermentation: A bioprocess for manufacturing inorganic nanomaterials

NanoFermentation is the first system to use industrial bioprocessing methods to manufacture nanometer-scale inorganic engineering materials rather than organic compounds. NanoFermentation harnesses the natural metabolic processes of metal-reducing bacteria to create tailored, single-crystal nanoparticles of important engineering materials, particularly ferrites.

Posted: Jun 5th, 2006

Novel nanotube approach leads to significant performance improvement in composite materials

The extraordinary mechanical properties of carbon nanotubes (CNTs) have generated strong research interest in their possible use in reinforced composite materials. So far, different studies using carbon-nanotube reinforcements in polymer composites have reported only small improvements in the bulk mechanical properties compared with traditional fiber-reinforced composites. Through a novel approach, researchers have created a CNT-based composite material that exhibits significant improvements in fracture performance and structural damping.

Posted: Jun 2nd, 2006

Superior optical labels made from diamond nanoparticles

Optical labeling is an important tool in biological imaging because it offers superb discrimination between the sites of interest and the crowded background of a biological specimen. Diamonds nanocrystals have several advantages over other optical labels and open new opportunities in optical imaging, especially in applications where the size of optical labels represents an important parameter.

Posted: Jun 1st, 2006

Single molecule Kondo switch

A recent study shows that just by changing the structure of a molecule, without altering its chemical composition, can lead to a variation in the spin-electron interaction strength, and consequently the associated Kondo temperatures.

Posted: May 31st, 2006