Biology Reference
In-Depth Information
Figure 9.6
Schematic of the ways in which AuNPs can enhance biosensor technology.
Source:
Reproduced from Ref.
76
.
Figure 9.7
Schematic representation of the procedure for detection of DNA hybridiza-
tion using the Au nanoparticle-coated latex labels. Source:
From Ref.
73
.
(For color ver-
sion of this igure, the reader is referred to the online version of this topic.)
with bacteria captured on a filter, thus enabling detection to a limit of
5000 cells mL
−1
in just 25 min. Later work has improved on these LODs.
In 2006, Viswanathan used liposome coated CNTs for electrochemical
detection of cholera toxin with an LOD of 10
−16
g.
64
In 2009, Cheng and
colleagues employed CNTs, coated in Fe
3
O
4
nanoparticles, in an ampero-
metric biosensors for the rapid detection of coliforms.
65
The detection was
based upon determination of the phenol produced by an enzymatic reac-
tion in the bacteria solution.
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