All-solid-state ion-selective silicone rubber membrane electrodes with a new conducting polymer

• Published in: Journal of the Korean Physical Society Vol. 60; no. 6; pp. 925 - 928
• Main Authors: Park, Eun Rang, Chung, Yeon Joon, Hwang, Sun Woo, Heo, Min, Chae, Young Jun, Kim, Hong Seon, Lee, Sang Woo, Shin, Jae Ho, Kim, In Tae, Kwan, Gi-Chung, Lee, So Ha
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.03.2012; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Conducting polymer; Plasma; Ion-selective membrane electrodes
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.60.925

New conducting polymers containing heterocyclic rings with carbazole, ethylene dioxythiophene (EDOT) and benzobisthiazole were synthesized and the characterized by using organic spectroscopic methods. Potentiometric ion-selective membrane electrodes (ISMEs) have been extensively used for ion analysis in clinical, environmental, and industrial fields owing to their wide response range (4 to 7 orders of magnitude), no effect of sample turbidity, fast response time, and ease of miniaturization. Considerable attention has been given to alternative use of room-temperature vulcanizing (RTV)-type silicone rubber (SR) owing to its strong adhesion and high thermal durability. Unfortunately, the high membrane resistance of SR-based ion-selective membranes (ISMs) (2 to 3 higher orders of magnitude compared to those of poly(vinyl chloride)(PVC)-based ones) has significantly restricted their application. Herein, we demonstrate a new method to reduce the membrane resistance via addition of a new conducting polymer into the SR-based ISMs.