Eight combinatorial stacks of three layers of carbon black/PVA-carbon black/EVA composite as a vapor detector array.
Eight specimens of combinatorial stacking of 3 layers of carbon black/PVA-carbon black/EVA composite were prepared on substrate with interdigitated electrode. They were subjected to 15 solvent vapors with dielectric constants from 2-80,and their responses were processed for calculation of resolution factor (RF). If the detector responses are assumed to have a normal distribution, RF values of 1.0, 2.0, and 3.0 indicate the 76, 92, and 98% confidence, respectively, of correctly identifying one analyte from the other of a specific pair. Of the possible 105 pairs, 99 pairs have RF values of more than 3, 5 pairs have RF values of more than 1, and only one pair has an RF value of less than 1. The resolution factor was affected by both the dielectric constant and boiling point of tested solvents. Employing Fisher linear discrimination improves all RF values greater than 3, making confidence in resolving the pair reach almost 100%. Contributions from each combination were studied, and it was shown that diversity by combinatorial stacking is essential to the improvement of RF value. All of these capabilities are derived from combinatorial stacking of 3 layers of just two simple carbon black/polymer composites.
National Metal and Materials Technology Center, 114 Thailand Science Park Paholyothin Road, Klong 1, Klong Luang, Pathumthani, Thailand 12120. paisan@mtec.or.th
Paisan
P
Setasuwon
Laongdao
L
Menbangpung
Somboon
S
Sahasithiwat
D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D004867:Equipment Design; D005740:Gases / Q000032:analysis*; D011142:Polyvinyl Alcohol; D012997:Solvents / Q000032:analysis*; D053260:Soot
D005740:Gases; D012997:Solvents; D053260:Soot; D011142:Polyvinyl Alcohol