Response of alumina resistance to trace concentrations of acetone vapors at room temperature

Ján Ivančo – Yuriy Halahovets – Monika Benkovičová – Matej Micušík – Jozef Kollár –
Dmytro Kostiuk – Ana Hološ – Jaroslav Mosnáček

   The study demonstrates that resistivity of an alumina wafer is highly sensitive to trace concentrations of acetone vapors at room temperature. Though, a thermal pretreatment is necessary to precede the room-temperature sensing of acetone vapors, whilst the sensitiveness increases with the pretreatment temperature. This advocates the alumina being suitable for an adequate acetone sensor in the ppm range. A plausible mechanism of the response is discussed.

Keywords: gas sensor, chemiresistor, acetone, Al₂O₃, alumina

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