1.2.1 Urea Biosensor Using NH3 Nitrided Amine Groups on Flexible Substrate
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- 1.2 Biosensors I
- I. Wang - Graduate Institute of Electro-Optical Engineering, Chang Gung University (Taiwan), C. Yang, Y. Lin, C. Huang, C. Lai - Biosensor Group, Department of Electronic Engineering, Chang Gung University (Taiwan), C. Lue - Department of Device Engineering, Inotera Memories Inc. (Taiwan), T. Lu - Device Section, Department of Device Development (Taiwan), D. Pijanswska - Pijanswska, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences (Poland)
- 80 - 83
In this study, indium tin oxide (ITO) layers were deposited on polyethylene terephthalate (PET) substrates (ITO/PET) as a sensing membrane. In order to generate the amine groups on the surface for urease immobilization, NH3 plasma was used with RF power of 100 W for various times. The pH sensitivities of ITO/PET electrodes treated without and with NH3 plasma for 3 and 6 min were all around 51 mV/pH. However, the pH sensitivities of the samples treated with NH3 plasma for 9 min were slightly reduce to 45 mV/pH. In addition, the urea sensitivities of ITO/PET EGFET can be increased from 20.7 to 43.3 mV/pCurea by NH3 plasma from 3 to 9 min.