P1.3.14 CCD-Type Multi-Ion Image Sensor with Two Kinds of Plasticized Poly(vinyl chloride) Membranes

14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany
P1.3 Sensors Based on Optical Techniques
T. Hattori, Y. Kojima - Department of Electrical and Electronic Information Engineering (Japan), K. Tokunaga, Y. Masaki - Department of Materials Science (Japan), R. Kato - Cooperative Research Facility Center, Toyohashi University of Technology (Japan), K. Sawada - Core Research for Evolutional Science and Technology (CREST) (Japan)
967 - 970


A charge coupled device (CCD)-type multi-ion image sensor for sodium ion and potassium ion was fabricated. Two kinds of plasticized poly(vinyl chloride) (PVC) membranes contained different ionophores were separately prepared on the semiconductor image sensor. The membrane preparations were occurred by a conventional casting method with hand painting, and inkjet painting with a laboratory inkjet printing apparatus. Since the casting solvent of tetrahydrofuran (THF) has low viscosity and high osmosis, a pre-constructing PVC membrane was easily invaded by the next THF casting solution. Then a partition wall was constructed in the center of the sensor region in order to prevent two membranes from contacting. The hand painting was fast and easy without special equipment, but it was hard to control each sensing area finely. The inkjet painting can finely prepare each membrane to control the painting area. In inkjet painting, however, THF was inappropriate as its printing solvent because of high volatility. The mixture solvent of THF and cyclohexanone (CHN) was suitable. Both CCD-type multi-ion image sensors prepared by different ways displayed that each membrane apparently responded to only sodium ion or only potassium ion, according to their selectivity coefficients. Sodium and potassium ions can be simultaneously monitored on the CCD-type multi-ion image sensor.