MyJournals Home  

RSS FeedsSensors, Vol. 18, Pages 1715: Simulation of Graphene Field-Effect Transistor Biosensors for Bacterial Detection (Sensors)

 
 

26 may 2018 18:00:02

 
Sensors, Vol. 18, Pages 1715: Simulation of Graphene Field-Effect Transistor Biosensors for Bacterial Detection (Sensors)
 


Foodborne illness is correlated with the existence of infectious pathogens such as bacteria in food and drinking water. Probe-modified graphene field effect transistors (G-FETs) have been shown to be suitable for Escherichia coli (E. coli) detection. Here, the G-FETs for bacterial detection are modeled and simulated with COMSOL Multiphysics to understand the operation of the biosensors. The motion of E. coli cells in electrolyte and the surface charge of graphene induced by E. coli are systematically investigated. The comparison between the simulation and experimental data proves the sensing probe size to be a key parameter affecting the surface charge of graphene induced by bacteria. Finally, the relationship among the change in source-drain current (?Ids), graphene-bacteria distance and bacterial concentration is established. The shorter graphene-bacteria distance and higher bacterial concentration give rise to better sensing performance (larger ?Ids) of the G-FETs biosensors. The simulation here could serve as a guideline for the design and optimization of G-FET biosensors for various applications.


 
54 viewsCategory: Chemistry, Physics
 
Sensors, Vol. 18, Pages 1716: Contention-Aware Adaptive Data Rate for Throughput Optimization in LoRaWAN (Sensors)
Sensors, Vol. 18, Pages 1714: Sensors and Functionalities of Non-Invasive Wrist-Wearable Devices: A Review (Sensors)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Physics


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten