1. A sensor, comprising: a substrate; a conductive base disposed adjacent the substrate; a dielectric material covering at least a region of the conductive base; one or more nanostructures disposed upon the dielectric material such that at least one or more of the nanostructures are in contact with the dielectric material throughout at least most of the one or more nanostructures' length and capacitively coupled to the conductive base; and a top lead electrically communicating to the one or more nanostructures, wherein said top lead extends substantially across the one or more nanostructures.