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Mechanical deposition of sensing materials on six different substrates. A) Comparison of changes in conductance of sensing materials deposited on six different substrates in response to five consecutive exposures to 50 ppm pyridine. B–C) The average normalized conductance response (first exposure exempt) of at least six sensors on each substrate upon five consecutive exposures to various concentrations of pyridine for 30 s with 60 s recovery time.
