Investigation of Highly Sensitive Cadmium Ion Selective FET Sensors with AC Impedance Analysis. (24th April 2020)

• Record Type: Journal Article
• Authors: Wang, Shin-Li; Hsieh, Ching-Yen; Wang, Yu-Lin
• Is Part Of: ECS transactions. Volume 97:Number 6(2020)
• Page Start: 37
• Page End: 41
• Publication Date: 2020-04-24
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/09706.0037ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : In this study, we developed a cadmium ion selective sensor which can detect cadmium ion in water, in the convenience of home/office. The ion selective membrane (ISM) FET sensor combines novel extended gate FET structure and cadmium ion selective membrane. With the unique structure and the methodology the sensitivity of Cd-ISFET is 71 mV/ decade [Cd 2+ ] which is beyond ideal Nernst sensitivity and the detection limit is comparable with ICP-MS. The AC impedance measurement result is also analyzed in this research. Through the AC impedance results we can find out and investigate the mechanism of Cd-ISFET.