Abstract: The present invention provides for a static charge generating assembly. The static charge generating assembly is comprised of: (a) a support structure built from a plurality of friction fit building elements; (b) positive and negative static charge generating wheels; (c) a belt wrapped around the static charge generating wheels; (d) a power source electrically coupled to a driving means for rotating at least one of the static charge generating wheels and the belt at a preselected rotational speed; and (e) positive and negative electrodes secured to the support structure adjacent to the belt. Each of the electrodes is mounted on at least one of the friction fit building elements positioned adjacent to a static charge generating wheel operable to collect static charge. Separate positive and negative static charge collectors are used for storing the negative and positive static charges from the electrodes.

Abstract: A device for accumulation of vapor analytes incorporating nanotubes grown by CVD is described. The devices are used in sensors and as a preconcentrator for a gas chromatograph.