Glucose Detection Characteristics of an Extended-Gate Field-Effect Transistor Fabricated by the Enzyme Immobilization Using a Long-Chain-Aminosilane Agent

Abstract

Glucose detection characteristics were studied for an extended-gate field-effect transistor fabricated by an enzyme immobilization using a long-chain-aminosilane agent. The sensor was able to detect reversibly and repeatedly the glucose concentration in phosphate buffered solution with a considerably low Michaelis constant of 0.045 mg/mL for more than a month. These results indicate that the sensor enables to detect repeatedly such low glucose concentrations as those in sweat and saliva.