▎ 摘　　要

NOVELTY - The capacitive sensor has dielectric material integrally formed on pair of electrodes. The dielectrical material comprises transition-metal composite of porous graphene oxide. The composite comprises 5-12 wt % transition metal. The transition metal is cobalt, nickel, titanium, ruthenium, palladium or zirconium. The pair of electrode is interdigitated electrode. The sensor is conductively connected to an electrical circuit adapted to monitor the capacitance of sensor. The transition metal is selected from the group consists of cobalt, nickel, titanium, ruthenium, palladium and zirconium. USE - Capacitive sensor for used in sensing device for detection of organophosphate vapors in air (claimed). Can also be used in energy- constrained applications such as low-power battery-operated systems and wireless sensor networks. ADVANTAGE - The capacitive sensors are fabricated to detect organophosphates, with a very short response time, by incorporating into porous graphene oxide sensors some specific transition metal cations. The sensors exhibit extraordinary sensitivity, displaying impressive 340-1000 capacitance response upon interactions with threshold concentrations of OP compounds (e.g. triethyl-phosphate), and up to 1000 capacitance over the tested concentrations range. The OP vapor sensors are easy to prepare, and their superior sensing properties may be employed in practical OP alert systems. They are able to react to the presence of as little as 5 parts per million by volume (ppmv) of triethyl phosphate, and showed linearity throughout the tested range of up to 100 ppmv, with very little or no cross reactivity to volatile organic compounds in comparable concentrations. This threshold concentration is muc. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of sensors in vapor-sensing applications.