Hybrid chitosan-coated manganese ferrite nanoparticles for electrochemical sensing of bifenox herbicide

Electroactive Core–Shell Chitosan-Coated Lanthanum Iron Oxide as a Food Freshness Level Indicator for Tyramine Content Determination

“…It has been mentioned that the presence of CS coverage can increase the dispersibility of LFO. In other words, the existence of CS coverage onto the LFO NPs can significantly improve the electrostatic interactions of tyramine onto the modified electrode surface, thus resulting into a higher electrocatalytic response …”

“…It has been depicted that the existence of synergistic effect between the LFO and CS is responsible for the impressive electrochemical response. The presence of the nano-ranged LFO provided a large number of active redox sites for the charge transportation, requisite for the electrocatalytic oxidation of tyramine. Additionally, such types of semiconductor materials possess numerous surface defects, which may also facilitate the charge transportation .…”

“…In other words, the existence of CS coverage onto the LFO NPs can significantly improve the electrostatic interactions of tyramine onto the modified electrode surface, thus resulting into a higher electrocatalytic response. 12 Moreover, it can be seen from Figure 7b that, among the variously prepared core−shell x CS/LFO (x = 100, 200, 300, 400, and 500) NPs, the 400 CS/LFO exhibited the prominent anodic peak current of 2.50 × 10 −4 A at a potential of 0.71 V. The initial increase in amount of CS from 100 to 400 mg provided an improvement in the electrocatalytic response (anodic peak current increases from 1.74 × 10 −4 to 2.50 × 10 −4 A). However, further increase in its amount to 500 mg provided a decrement in the peak current.…”

“…It has been mentioned that the existence of magnetic nanoparticles (NPs) can provide an enhanced electrocatalytic phenomena in cyclic voltammetry (CV) studies; thus, can amplify the redox current as well as the diffusion coefficients of the targeted analytes. In addition to this, such materials are also able to extend the average life time of the proposed sensing platform by maintaining the conductive nature of the electrode . In recent times, perovskite oxides have been known to display significant electrochemical ability because of the existence of sufficient coverage area as well as excellent electrocatalytic oxidation/reduction property.…”

“…In addition to this, such materials are also able to extend the average life time of the proposed sensing platform by maintaining the conductive nature of the electrode. 12 In recent times, perovskite oxides have been known to display significant electrochemical ability because of the existence of sufficient coverage area as well as excellent electrocatalytic oxidation/reduction property. Such types of oxides are usually represented by the general formula ABO 3 , where A is a larger rare-earth metal cation holding oxygen atoms via cuboctahedral co-ordination, whereas B represents a smaller transition metal ion engaged with oxygen atoms via octahedral co-ordination.…”