Non-enzymatic electrochemical detection of creatinine based on a glassy carbon electrode modified with a Pd/Cu₂O decorated polypyrrole (PPy) nanocomposite: an analytical approach

Abstract

The major constraints of standard enzymatic biosensors are poor long-term storage stability and high cost. Hence, there is extensive research towards fabrication of reliable enzymeless biosensors based on nanomaterials. In...

A Sensitive Enzymatic Electrochemical Biosensor for Cholesterol Based on Cobalt Ferrite@Molybdenum Disulfide/Gold Nanoparticles

“…The excellent linear regressions were also exhibited in the plots of log Ipa and log Ipc vs log v as Ipa = 0.4048x + 0.5333 (R 2 = 0.9934) and Ipc = −0.4247x - 0.4611 (R 2 = 0.9948) as shown in Figure d. It suggests that surface diffusion controls the electrode reaction. , Figure a depicts a prospective reaction process for the electrochemical oxidation in cholesterol. The surface coverage area (Γ) of cholesterol on CoFe 2 O 4 @MoS 2 /Au/ChOx/GCE was calculated by the following equation: I a = false( n 2 F 2 / 4 R T false) Γ A v where F represents the Faraday constant (96,500 C mol –1 ), A represents area of the electrode (cm 2 ), n the number of electrons transferred, which was found to be 2 in this case, v the scan rate (V s –1 ), R the gas constant (J K –1 mol –1 ), and T temperature (°C).…”

Electrochemical detection of creatinine: exploiting copper(ii) complexes at Pt microelectrode arrays

“…18 Recognizing the signicance of addressing these shortcomings, recent developments have led to the creation of non-enzymatic creatinine sensors. [19][20][21][22][23] This work proposes an alternative methodology for the non-enzymatic detection of creatinine, an apparently electrochemically inert compound. Specically, the detection mechanism relies on the formation of electrochemically active creatinine complexes and direct voltammetric analysis at microelectrode arrays.…”