Perylene diimide/MXene-modified graphitic pencil electrode-based electrochemical sensor for dopamine detection

Copper oxide integrated perylene diimide self-assembled graphitic pencil for robust non-enzymatic dopamine detection

“… 52 Moreover, upon successive current amplification with the increase in scan rate, a slight potential shift in the CV response was also observed, which indicated the increased absorption or surface coverage of DA at the electrode surface. 17,53–55 The calibration plot of the scanning speed against the redox peak currents revealed a characteristic adsorption-controlled process, as shown in Fig. 6(B) .…”

“… 15,16 PDI provides an easily functionalizable electron-attracting imide fragment with exceptional emissive, chromophoric and redox properties, especially for sensing applications. 17,18 All these characteristics lead to superior electrical, chemical, thermal and photostability of PDI, along with its exceptional conductivity and sensitivity. 19–22 However, the ability of PDI molecules to self-aggregate in solution form limits their practical application.…”

Al2O3/Covalent Organic Framework on 3D-Printed Nanocarbon Electrodes for Enhanced Biomarker Detection

“…The Randles−Sevcik equation was further used to calculate the electrochemical active surface area (EASA) of these 3D electrodes. 40 The EASA of the activated 3D-printed electrode and Al 2 O 3 /COF/3DE was calculated to be 0.297 and 0.512 cm 2 , respectively. In addition, the electrochemical properties of these prepared electrodes were further studied by electrochemical impedance spectroscopy (EIS) experiments (Figure 4B).…”

Nickel -doped iron oxide nanoparticle-conjugated porphyrin interface (porphyrin/Fe2O3@Ni) for the non-enzymatic detection of dopamine from lacrimal fluid

“…Furthermore, the sp 2 -hybridized graphitic surface offers ease of fabrication and good adsorption capability without using any binder. 33 Before fabrication, the edge of the GPE was cut with the cutter to obtain a smooth and clean working interface. Meanwhile, the porphyrin/Fe 2 O 3 @Ni interface was also examined under different DA concentrations in phosphate-buffered saline (PBS) with (CV) in the range of −0.2 to 0.6 (V vs. Ag/AgCl) and (DPV) in the potential bounds of 0-0.8 (V vs. Ag/AgCl) with step-size of 25 mV and pulse size of 250 mV.…”