Graphene-Based Ion-Selective Field-Effect Transistor for Sodium Sensing.

ABSTRACT: Field-effect transistors have attracted significant attention in chemical sensing and clinical diagnosis, due to their high sensitivity and label-free operation. Through a scalable photolithographic process in this study, we fabricated graphene-based ion-sensitive field-effect transistor (ISFET) arrays that can continuously monitor sodium ions in real-time. As the sodium ion concentration increased, the current-gate voltage characteristic curves shifted towards the negative direction, showing that sodium ions were captured and could be detected over a wide concentration range, from 10^-8 to 10^-1 M, with a sensitivity of 152.4 mV/dec. Time-dependent measurements and interfering experiments were conducted to validate the real-time measurements and the highly specific det

SUBMITTER: Huang T 

PROVIDER: S-EPMC9370261 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature