120th General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2+3
Time 10월 20일 (금요일) 13:00~14:30
Code ELEC.P-492
Subject Glucose sensor based on enzyme bonded- conducting polymer formed on metal alloy in hierarchical structure
Authors Won-Chul Lee, Kyeongdeok Seo, Yoon Bo Shim*
Department of Chemistry, Pusan National University, Korea
Abstract A novel amperometric sensor for glucose was developed by enzyme bonded-conducting polymer coated on the hierarchically structured metal alloy (Au, Zn, Ni, Cu, Co, etc.). Poly-3′-(carboxylic acid)-2,2′:5′,2′′-terthiophene (pTTCA) and poly-3′-(benzoic acid)-2,2′:5′,2′′-terthiophene (pTTBA) were exmined as the probe material. The sensor probe was prepared by electrochemical formation of enzyme-conducting polymer layer on a metal alloy using normal pulse voltammetry (NPV) and chronoamperometry (CA). The characterization of each layer was performed using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). Experimental parameters were optimized in terms of pH, temperature, applied potential, deposition potential and deposition time. The proposed sensor exhibited highly stable and short response time (< 1s). The linear dynamic range was between 30 μM and 5 mM with the detection limit of 5.3 ± 0.42 μM.
E-mail wclee13@pusan.ac.kr