Indian Journal of Engineering & Materials Sciences

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Drift analysis of a Pd loaded SnO2 based linalool sensor


Affiliations
1 Department of Electronics & Communication Engineering, Tezpur University, Tezpur 784028, Assam, India
2 Department of Electronics and Communication Engineering, Assam Don Bosco University, Azara, Guwahati 781017, Assam, India

An approach has been made in this work to analyze sensitivity drift in a Pd decorated SnO2 sensor developed for detection of linalool, a significant aroma compound in tea.  Prior to the drift analysis, an attempt has been made to choose the optimum loading percentage of Pd in SnO2 for linalool sensing.  An inexpensive and simplistic hydrothermal method has been used to develop five different Pd decorated SnO2 sensors (0.5 wt%, 2 wt%, 5 wt%, 6 wt% and 8 wt%) and compare their sensitivities when exposed to linalool vapour. The analysis has shown that 6 wt% exhibits better sensitivity (62.7%) towards Linalool at a relatively lower temperature (100 °C) as compared to all the other synthesized sensors. Henceforth, extensive experiments has been performed on the 6 wt% Pd decorated SnO2 sensor for a period of one month to analyze its stability. Relative standard deviation and principal component analysis based drift analysis has been performed to understand its changing attributes under repeated measurements.
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  • Drift analysis of a Pd loaded SnO2 based linalool sensor

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Authors

Priyanka Kakotya
Department of Electronics & Communication Engineering, Tezpur University, Tezpur 784028, Assam, India
Manabendra Bhuyan
Department of Electronics & Communication Engineering, Tezpur University, Tezpur 784028, Assam, India
Karen Das
Department of Electronics and Communication Engineering, Assam Don Bosco University, Azara, Guwahati 781017, Assam, India

Abstract


An approach has been made in this work to analyze sensitivity drift in a Pd decorated SnO2 sensor developed for detection of linalool, a significant aroma compound in tea.  Prior to the drift analysis, an attempt has been made to choose the optimum loading percentage of Pd in SnO2 for linalool sensing.  An inexpensive and simplistic hydrothermal method has been used to develop five different Pd decorated SnO2 sensors (0.5 wt%, 2 wt%, 5 wt%, 6 wt% and 8 wt%) and compare their sensitivities when exposed to linalool vapour. The analysis has shown that 6 wt% exhibits better sensitivity (62.7%) towards Linalool at a relatively lower temperature (100 °C) as compared to all the other synthesized sensors. Henceforth, extensive experiments has been performed on the 6 wt% Pd decorated SnO2 sensor for a period of one month to analyze its stability. Relative standard deviation and principal component analysis based drift analysis has been performed to understand its changing attributes under repeated measurements.