A graphene field-effect capacitor sensor in electrolyte
2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 101, no 15, 154106- p.Article in journal, Letter (Refereed) Published
The unique electronic properties of graphene are exploited for field-effect sensing in both capacitor and transistor modes when operating the sensor device in electrolyte. The device is fabricated using large-area graphene thin films prepared by means of layer-by-layer stacking. Although essentially the same device, its operation in the capacitor mode is found to yield more information than in the transistor mode. The capacitor sensor can simultaneously detect the variations of surface potential and electrical-double-layer capacitance at the graphene/electrolyte interface when altering the ion concentration. The capacitor-mode operation further facilitates studies of the molecular binding-adsorption kinetics by monitoring the capacitance transient
Place, publisher, year, edition, pages
2012. Vol. 101, no 15, 154106- p.
Electrical Engineering, Electronic Engineering, Information Engineering Nano Technology
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-185550DOI: 10.1063/1.4759147ISI: 000310304900106OAI: oai:DiVA.org:uu-185550DiVA: diva2:572068