Tunable graphene oxide for the low-fouling electrochemical sensing of uric acid in human serum

Abstract

Although many works have been reported to improve the selectivity of uric acid (UA) to eliminate other electroactive interference species which coexist in biological fluids. Two main challenges associated with...

Polypyrrole/α-Fe2O3 Hybrids for Enhanced Electrochemical Sensing Performance towards Uric Acid

“…Subsequently, this radical species loses an electron and undergoes hydrolysis to form a secondary amine. The aforementioned prediction was consistent with earlier reports on the oxidation of similar structures [31]. Additionally, as shown in Figure 5e, the anodic peak current reached its maximum at a pH of 7.0; therefore, all electrochemical measurements were conducted at this pH.…”

“…Currently, the limit of detection (LOD) achieved through electrochemical techniques is approximately 1-25 nM [20][21][22][23][24] and 0.1-0.3 µM [25][26][27] for dopamine and glucose, respectively. Notably, fruitful results have also been obtained in utilizing electrochemical detection for UA research [28][29][30][31][32].…”

Fluorescent dual-mode sensor for the determination of graphene oxide and catechin in environmental or food field

“…In this broad family graphene oxide (GO) is considered as a heterogeneous structure that is rich in oxygen functional groups such as hydroxyl and epoxy at the basal plane and carboxylic groups at the edges. 1 Unlike graphene, the presence of functional groups in the material involves the existence of sp 3 carbon atoms that widen the optical bandgap, giving rise to uorescent materials. 2 GO is typically prepared by the oxidation of graphite with strong acids and other oxidants followed by an exfoliation step.…”

“…2 However, few uorescence sensors related to the competitive adsorption of chemical compounds on GO-based materials surface have previously been reported. 1,8,9 Intensive production of nanomaterials at industrial scale, as well as their commercialization in consumer products, such as electronic devices, cosmetics, food and drugs will increase the human and environmental exposure to these nanomaterials. Their release into the environment could presents several risks to human health and ecosystem, 3,10 so, it is necessary to evaluate their possible effects.…”