A novel electrochemical sensor based on thermally reduced graphene oxide for the sensitive determination of dopamine

Nanostructures in Biosensors: Development and Applications

“…Furthermore, it was proposed that the sensing mechanism was based on the negative charge of the oxygen-containing functionalities on the modified electrode, which attracted the positively charged analyte. With a similar approach, Gaidukevic et al [45] prepared a sensitive electrochemical rGO-based biosensor for the determination of dopamine in the presence of malonic acid and P 2 O 5 additives. Experimental results showed that the proposed biosensor exhibited high sensitivity of 28.64 μA μM −1 cm −2 and a low LOD value of 0.11 μM for the detection of dopamine.…”

Rapid detection of caffeic acid in food beverages using a non-enzymatic electrochemical sensor based on a Bi2S3/CNF nanocomposite

“…22 For instance, Yan et al synthesized Bi 2 S 3 /rGO nanocomposites employing thioacetamide as a sulfur source, and these nanocomposites were then employed as the active layer in a dopamine sensor, resulting in signicant enhancements in selectivity and sensitivity. 23 Conversely, carbon-based materials are widely used in electrochemical sensor applications, 24 such as graphitic carbon nitrate (g-C 3 N 4 ), 25 reduced graphene oxide (rGO), 26 carbon nanotubes (CNTs), 27 single walled carbon nanotubes (SWCNT), 28 multi-walled carbon nanotubes (MWCNTs) 29 and carbon nano bres (CNFs). 30 For instance, Mehmandoust et al displayed the use of nanostructured materials by developing metal-carbon nanocomposites and a nanometal-based electrochemical sensor for use in pharmaceutical and organic waste detection, 31,32 in which very low detection limits were obtained in the concentration range of micromolar to nanomolar.…”

A 3D carbon black disposable electrochemical sensor modified with reduced graphene oxide used for the sensitive determination of levofloxacin

“…These modifiers have shown synergistic effects increasing the number of electroactive sites, detectability, and in some cases have also shown electrocatalytic effects in electro-oxidation processes. 33–36…”

“…These modifiers have shown synergistic effects increasing the number of electroactive sites, detectability, and in some cases have also shown electrocatalytic effects in electro-oxidation processes. [33][34][35][36] Since LEV is considered an emerging pollutant and has been widely used in aquaculture for prophylactic purposes, 8,37,38 the development of selective and sensitive methods are highly required. Hence, this work aimed to manufacture a 3Dprinted electrode using a commercial filament composed of carbon black (CB) and PLA (CB/PLA), extruded by a 3D-pen, and to perform surface modification with rGO nanosheets by a drop-casting technique.…”