Patent ID: 7312095

Claim:
A method of fabricating an electronic system for selectively detecting and identifying a predetermined number of chemical species, comprising the steps of: (a) providing an array of nanostructure sensing devices, each nanostructure sensing device comprising at least one nanostructure and at least two contact electrodes, wherein the at least one nanostructure provides electrical coupling between the at least two contact electrodes; and (b) modifying selectivity for sensing of the nanostructures within at least a portion of the array of nanostructure sensing devices, such that at least one nanostructure sensing device produces a measurably changed signal when exposed to the chemical species; and (c) modifying at least two nanostructure sensing devices to have the same selectivity for sensing, (d) providing shielding impermeable to at least the plurality of chemical species to at least one of the at least two nanostructure sensing devices and (e) allowing at least one of the at least two nanostructure sensing devices to be at least partially exposed to at least the plurality of chemical species.