TITLE:
Electronic Detection of Escherichia coli O157︰H7 Using Single-Walled Carbon Nanotubes Field-Effect Transistor Biosensor
AUTHORS:
Xiaoxian Zhang, Dongwei Wang, Danna Yang, Sai Li, Zhiqiang Shen
KEYWORDS:
Single-walled Carbon Nanotubes (SWNTs); Field Effect Transistors; Biosensor; Escherichia Coli O157︰H7
JOURNAL NAME:
Engineering,
Vol.4 No.10B,
October
21,
2013
ABSTRACT: Field effect transistors
(FET) based on Single-Walled Carbon Nanotubes (SWNTs) become the hot topic in
fields of nano-electronic, clinical diagnostics, environmental testing etc. in
recent years. In this paper, we reported a simple, scalable way to enrich semiconducting
SWNTs by using HNO3/H2SO4. Then carbon nanotube field-effect transistors
(CNTFET) biosensor was fabricated with the enrichment SWNTs for Escherichia
coli O157︰H7 detection. The
response of each CNTFET was monitored in real time before and after
introduction of the Escherichia coli O157︰H7 at various concentrations. The results show that
CNT-FET biosensors we fabricated are sensitive to change of concentration of
solution and response time is really short.