SODIUM AND POTASSIUM SENSORS BASED ON SEPARATED EXTENDED GATE FIELD EFFECT TRANSISTOR

Author:

Hsu Hsiang-Yi1,Wu Chang-Yeh1,Lee Hsiang-Ching2,Lin Jyh-Ling1,Chin Yuan-Lung1,Sun Tai-Ping3

Affiliation:

1. Department of Electronic Engineering, Huafan University, Taipei, Taiwan

2. Department of Mechatronic Engineering, Huafan University, Taipei, Taiwan

3. Department of Electrical Engineering, National Chi Nan University, Nantou, Taiwan

Abstract

A double potassium and sodium ions sensor based on separated extended gate field effect transistor (SEGFET) and a new entrapment method are proposed in this study. Having high sensitivity, reproducibility, and a simple manufacturing process, the sensors are quickly able to supply information and detect human blood within an abnormal range. The sensing membranes were fabricated using a Poly(vinyl chloride) carboxylated (PVC-COOH) matrix; sodium ionophore (B12C4) or potassium ionophore (valinomycin). The sensitivity of ion-selective biosensors is 42.55 mV/decade for Na+ between 1 M and 10-7 M, 42.75 mV/decade for K+ between 1 M and 10-6 M.

Publisher

National Taiwan University

Subject

Biomedical Engineering,Bioengineering,Biophysics

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