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Stressed CNTs are Reliable

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TROY, N.Y., Oct. 24, 2007 -- If blocks of carbon nanotubes (CNTs) are squeezed over and over again with the same amount of force, their electrical resistance decreases by a constant amount each time. This reliable relationship gives CNTs a powerful advantage as pressure sensors. Researchers at Rensselaer Polytechnic Institute, seeking to take advantage of the unique electrical and mechanical properties of nanotubes, repeatedly squeezed a 3-millimeter nanotube block and discovered it was highly suitable for potential applications as a pressure sensor. No matter how many times or how hard they squeezed the block, it...Read full article

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    Published: October 2007
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    sensor
    1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
    strain
    In optics, the mechanical tension, compression or shear in optical glass due to internal stress caused by improper cooling or annealing during manufacture of the glass or the subsequent working of molded parts.
    carbon nanotubesCNTelectricalindustrialmicroelectromechanicalnanoNews & Featuresphotonicspressurepressure sensorsPushparajRensselaerresistanceRPIsensorSensors & DetectorsSreekalastrainstressSubbalakshmi

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