Low-Cost Portable Polymer-based Micro Electrochemical Sensor (PMES) System for Rapid Detection of the Cordyceps Sinensis

We report a low-cost Polymer-based Micro Electrochemical Sensor (PMES) system for the detection of the Cordyceps sinensis's DNA (CorDNA). With the electrochemical impedance spectroscopy (EIS), solution with different CorDNA concentrations can be significantly discriminated. Through the equivalent circuit model (ECM), CorDNA concentrations can be quantified by the solution resistance Rsol and double layer capacitance Cdl. The limit of detection (LOD) of PMES was 10 nM. Moreover, a portable electrochemical sensor system integrating MCU for CorDNA detection was built. Compared with conventional PCR-based methods, PMES has lower consumption sample volume of 5 μL, shorter response time and lower cost. © 15CBMS-0001.