An Effective Resistive-Type Alcohol Vapor Sensor Using One-Step Facile Nanoporous Anodic Alumina

With the increases in work environment regulations restricting alcohol to 1000 ppm, and drink-driving laws, testing for with a simple method is crucial issue. Conventional sensors based on sulfide, metal oxide, boron nitride or graphene oxide have detection limit range of 50–1000 ppm but disadvantages complicated manufacture longer processing times. A recent portable meter semiconductor material using conductivity chemistry measurements still has problem complex lengthy manufacturing process. In this paper, effective resistive-type vapor sensor one-step anodic aluminum (AAO) proposed. The nanoporous AAO was produced by anodizing low-purity AA1050 at room temperature 25 °C, which overcame traditional high-cost process low anodization etching from high-purity aluminum. highly specific surface area benefits good sensing performance, especially as humidity sensor. resistance measurement method, concentration 0, 100, 300, 500, 700 correspond mean resistances 8524 Ω, 8672 9121 9568 10,243 11,045 respectively, linear relationship. Compared other materials detecting vapor, resistive advantages fast limits practical applications. vapor-sensing mechanism described respect resistivity test substance pore morphology AAO. human breath test, can quickly distinguish whether subject drinking, normal response −30% −40% −20% after drinking 50 mL wine 25% alcohol.