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Nanotechnology Spotlight

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Showing Spotlights 1585 - 1592 of 1671 in category All (newest first):

 

A novel approach for the design of fluorescent sensors

Researchers in Germany report a novel approach for the design of environmental sensors based on fluorescence interference contrast (FLIC) of semiconductor nanocrystals near a reflecting silicon surface. Their method is based on nanocrystals incorporated into polymer layers grafted onto reflecting surfaces.

Posted: Jun 14th, 2006

Acoustic sensors made from magnetic nanowires

Researchers took inspiration from the packaging and transduction processes of the cochlea and cilia in the inner ear to design acoustic sensors made from nanowires. Specifically, they used nanowires of magnetostrictive materials as artificial cilia to sense acoustic signals. Any acoustic sensor application may benefit from this work.

Posted: Jun 13th, 2006

Novel use of polymer nanofibers as filters for chemical warfare defense

Researchers in Singapore functionalized a polymer nanofiber membrane to capture chemical warfare agents such as nerve agents. The nanofibers in the membrane act as a substrate on which the nerve agents get physically adsorbed followed by chemical decomposition.

Posted: Jun 12th, 2006

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