327Graphene-Based Electrochemical Biosensors
0.33–14.0 μM, a detection limit of 0.11 μM, and good operational and storage stability. Many
other functionalized graphene materials such as water-soluble sulfonated graphene lm
prepared by functionalizing NaBH
4
-reduced graphene oxide with aryl diazonium for HRP
DET toward the electrochemical sensing of H
2
O
2
and NaNO
2
[55] have also been reported.
13.4.1.2 Graphene/Polymer Nanocomposites for DET-Based
Enzyme Electrochemical Biosensors
Graphene can be well-mixed with polymers to form novel nanocomposites for synergis-
tic properties of its components. These graphene–polymer nanocomposites have dem-
onstrated their DET ability of enzymes for electrochemical sensing. Graphene–chitosan
nanocomposite was ...