Sensitive electrochemical detection of polymorphisms in IL6 and TGFβ1 genes from ovarian cancer DNA patients using EcoRI and DNA hairpin-modified gold electrodes

Simultaneous detection of trace Pb(II) and Cd(II) cations in ore samples by anodic stripping analysis using pMO/erGO‐modified glassy carbon electrodes

“…The difference in oxidation and reduction peak potentials, ▵E p , was found to be 98 mV for pMO/erGO/GCE, which is higher than 57 mV. This suggests a quasi‐reversible behavior of the modified electrode [25]. However, it is still notably lower than that of the polished GCE electrode (133 mV).…”

“…Plotting the oxidation and reduction current densities vs. the square root of the scan rate showed a linear dependency, suggesting the electrode kinetics is controlled by the diffusion of electroactive species in solution [46]. Furthermore, we used Randles-Sevcik equation to calculate the active surface area [23,25]. The electroactive areas were found to be 0.121 and 0.08 cm 2 for pMO/erGO/GCE and bare GCE, respectively, denoting an increase of 50 % after the modification with the reduced graphene oxide and the polymer.…”

“…As an alternative, electrochemical techniques offer a more suitable approach to address these limitations. These methods are simple, costeffective, rapid, highly sensitive and fully meet "AS-SURED" criteria [18][19][20][21][22][23][24][25]. Among these electrochemical techniques, anodic stripping techniques are widely employed for the electroanalysis of heavy metal ions.…”

“…The specific type and quantity of these functional groups are contingent upon the chosen synthesis method and operational conditions (such as temperature, reaction time, and the oxidizing reagent employed) [29]. These intriguing attributes confer upon graphene oxide advantageous qualities such as improved solubility, stable dispersion, and more, rendering it suitable for a wide range of applications such as biosensors [22,30], biomedicine, conductive membranes [31], composite polymers, and beyond [23][24][25][32][33][34].…”

Enhanced sensitivity in electrochemical detection of ochratoxin A within food samples using ferrocene- and aptamer-tethered gold nanoparticles on disposable electrodes

“…Electrochemical methods have gained widespread attention due to their simplicity, cost-effectiveness, ease of operation, high sensitivity, and rapid sensing capabilities. 5,[14][15][16][17][18] Indeed, they allow the preparation of sensing devices that t the World Health Organization "ASSURED: Affordable, Sensitive, Selective, User-friendly, Equipment-free and Deliverable to end-users" criteria. 19,20 For instance, Gökçe et al 21 developed an aptamerbased electrochemical sensor for OTA detection, demonstrating practical application in samples using pencil graphite electrodes.…”