Introduction of Bifunctional Group onto MWNT by Radiation-Induced Graft Polymerization and Its Use as Biosensor-Supporting Materials

Table 2

Comparison of electrochemical properties to the tyrosinase-modified biosensors.

Type of electrode	Sensitivity (Am M^−1 cm^−2)	Sensing range	Detection limit (nM)	Stability	Reference
Poly 3,4-ethylenedioxythiophene/tyrosinase electrode	608	Not reported	5	Retains activity 30% after 12 days	[24]
Colloidal gold nanoparticles/graphite-Teflon/tyrosinase	407.04	0.010–8.0 M	20	39 days	[25]
Tyrosinase/3-mercaptopropionicacid-modified Au electrodes	196.7	0.2–100 M	88	5 days	[26]
Organoclay-enzyme film electrodes	75	0.2–15 M	Not reported	Not reported	[27]
Sol-gel immobilized tyrosinase electrode	208.83	1–60 M	200	Retains activity 57% of after 2 weeks	[28]
Nafion/ZnO/tyrosinase films	30.3	0.01–0.4 mM	4000	Retains activity 81.2% after 20 days	[29]
Poly(GMA-co-VF)-g-MWNT/DMF/tyrosinase electrode	187	0.1–20 mM	25	Retain activity 90% after 30 days	This work