Highly sensitive amperometric biosensors for phenols based on polyaniline–ionic liquid–carbon nanofiber composite

Efficient Immobilization of Tyrosinase Enzyme on Layered Double Hydroxide Hybrid Nanomaterials for Electrochemical Detection of Polyphenols

“…In the reduction-based mode, the same estimation gives a sensitivity of 1.20 μA/ng.mL −1 equivalent to 498 A.M −1 or 3952 A.M −1 ·cm −2 . These values are high as compared to others previously reported for tyrosinase-based systems [16]- [18], [23], [24], [28], [63], [66] which is useful for the comfort of detection and its quantification.…”

“…Different approaches have been developed for the immobilization of tyrosinase: silica sol-gel composite films [18], tyrosinase-modified boron-doped diamond electrodes [19], [20], tyrosinase entrapped in an agarose-guar gum [21], glassy carbon electrode modified by gold nanoparticles [22], tyrosinase-FeO 3 nanoparticles-chitosan [23], use of polyaniline-carbon nanofibers or nanotubes [24]- [27], diazonium salt [17] or titania sol-gel matrix [28] … Among host matrixes already used for the immobilization of enzymes recognizing polyphenols [6]- [11], [18]- [30], Layered Double Hydroxide (LDH) nanomaterials are attractive candidates for electrochemical analysis in general and for enzyme immobilization [31], [32], since they exhibit many advantageous features in the development of hybrid biomaterials. LDHs are an unusual family of layered materials consisting of positively charged layers with charge balancing anions inserted between these layers.…”

Wearable electrochemical sensors for monitoring performance athletes

“…ILs are known for their good biocompatibility with biomolecules and enzymes and they improve their reusability and stability. Some examples are based on the immobilization of enzyme-IL systems in chitosan [51] or Nafions [52] . Thus, catalytically active proteins and enzymes may also be confined for biosensors applications in order to achieve direct electron transfer within ionogels.…”

The Investigation of Electrochemistry Behaviors of Tyrosinase Based on Directly Electrodeposited Graphene on Choline–Gold Nanoparticals

“…And, the high applied voltage is also followed by an increase of background current and noise level. Furthermore, direct electrochemical oxidation of phenols is coupled with fouling reactions [7]. Electrochemical biosensors based on enzymes are suitable for a highly selective, sensitive, and rapid analysis of phenols in various biological species in vivo and in vitro [8].…”