Fabrication of glucose oxidase/polypyrrole biosensor by galvanostatic method in various pH aqueous solutions

An amperometric glucose biosensor based on the immobilization of glucose oxidase on the ZnO nanotubes

“…Therefore the values of the K app m and I max in this work can be calculated to be 19 mM and 24 A, respectively. The obtained K app m is lower than the recent reported glucose biosensors based on ZnO:Co nanoclusters (21 mM) [22], polypyrrole films (37.6 mM) [44], and nano-CaCO 3 (21.4 mM) [45]. The lower K app m means the higher enzymatic activity of immobilized GOx, thus the above result further indicates that the ZnONT modified biosensor possesses a high affinity to glucose.…”

Electrochemically fabricated polypyrrole nanofiber-modified electrode as a new electrochemical DNA biosensor

“…The guanine oxidation current increases with the increase in pH from 4.0 to 7.4, after which a decrease in the oxidation current is observed. This result might be assigned to the over-oxidation of the PPy nanofiber film or to the decreased electrical conductivity of the PPy nanofiber films at pH >7.4 (Uang and Chou, 2003).…”

Gold nanoparticle based optical and electrochemical sensing of dopamine

“…The ease of synthesis of ICPs and theirs unique properties encourages researchers to employ this material in the fabrication of biosensors. Some of the ICPs groups that are frequently used in biosensors application are polyacetylene [81], polythiophene [82], poly(p-phenylenevinylene) [83], poly(3,4-ethylenedioxythiophene) [84], polypyrrole [85], and polyaniline [86] where their structures are shown in Fig. 9.…”