Sensitivity of Nafion Films to Organic Substances, Especially Ketones

Figure 2

Graphic representation of the manufacture of the sensor. (a) Temple made with cuts and welding of cables for each electrode. (b) Deposition of Nafion in the manufactured template. (c) Sensor made with the Nafion film spread over the effective area and evaporated excess solvent. The samples were prepared using as a base a phenolic printed circuit board, which has a copper-coated side. This face was sectioned into  mm rectangles. Subsequently, a center groove was performed lengthwise to the plate to have a 1 mm gap between the copper sections where these sections are used as the sample electrodes. A copper cable is welded to this plate at the corners of each electrode, to allow connection with the measurement equipment. Finally, a Nafion film of about 3.0 μm thick is obtained.

(a)

(b)

(c)