Fig. 1. SEM images of surface shape according to heat treatment temperature variation. The dark area and bright area are binder and silver, respectively. MWCNT was also observed from the sample annealed at 350℃.
Fig. 2. Thickness and resistance variation of printed films according to annealing temperature.
Fig. 3. Sensitivity variation of printed film under the applied bias of 1 V. When it soaked into methanol, each film reveals relevant sensitivity according to heat treatment temperature.
Fig. 6. Sensitivity variation of Ag:CNT printed layer sensor.
Fig. 4. Resistance variation of printed film soaked in (a) brine and (b) methanol, respectively. Contradictory resistance change is observed.
Fig. 5. Temperature variation of sensor reaction about (○) brine and (●) methanol.
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