Abstract

Carbon nanoparticles (CNPs) have received considerable attention due to their exceptional qualities and adaptability. Their unique physical and chemical characteristics make them extremely intriguing as materials for numerous high-potential applications, such as electronics and gas sensing. This study focused on producing carbon-based nanomaterial devices by deposition of flame-formed carbon nanoparticles on a suitable substrate and investigating their gas-sensing properties. CNPs were produced in a fuel-rich laminar premixed ethylene/air flame and the collected CNP film was morphologically and electrically characterized. The electrical conductivity of the film was investigated as a function of ethanol concentration and amount of deposited material. Notably, CNP films exhibited high sensitivity to ambient ethanol gas concentrations, and rapid recovery times at room temperature, and showed a sensitivity increasing with the amount of deposited material and the surface complexity. Our findings demonstrate the high potential of combustion-generated CNPs as building materials for low-cost and portable ethanol sensors.

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