Sensing with liquid-gated graphene field-effect transistors

• Published in: 2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO) pp. 1 - 2
• Main Authors: Wangyang Fu, Nef, C., Tarasov, A., Wipf, M., Stoop, R., Knopfmacher, O., Weiss, M., Calame, M., Schonenberger, C.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-08-2012
• Subjects: Biosensors; field-effect transistors; Graphene; liquid gate; Logic gates; sensors; Transistors
• ISBN: 9781467321983; 1467321982
• ISSN: 1944-9399; 1944-9380
• DOI: 10.1109/NANO.2012.6321892

Liquid-gated graphene field-effect transistors (GFETs) with reliable performance are developed. It is revealed that ideal defect-free graphene should be inert to electrolyte composition changes in solution, whereas a defective one responses to electrolyte composition. This finding sheds light on the large variety of pH or ion-induced gate shifts that have been published for GFETs in the recent literature. As a next step to target graphene-based (bio-) chemical sensing platform, non-covalent functionalization of graphene has to be introduced.