Aptamer-based sensor for diclofenac quantification using carbon nanotubes and graphene oxide decorated with magnetic nanomaterials

PdII Dispersed on Magnetic Partially Reduced GO/OMWCNT Non‐Covalently Modified with a Vic‐Dioxime: An Efficient and Magnetically Retrievable Catalyst for Suzuki‐Miyaura Coupling Reaction

“…In comparison to or even better than CNT, graphene composed of 2D honeycomb‐like sp 2 carbon lattice get intense attention due to extraordinary chemical and mechanical properties and the presence of abundant oxygen‐containing functionalities such as phenolic, carboxylic which are tunable in nature [12] . Nevertheless, π‐π stacking interactions between graphene nanosheets in graphene supported metal nanocatalysts is the primary problem that cause of irreversible aggregation and consequently decrease their specific surface area and block active catalytic sites on graphene [13] . Hybridization of graphene sheets and CNTs (G‐CNT) have been shown better properties than their individual counterparts.…”

Functional Magnetic Graphene Composites for Biosensing

“…Most MGCs were built via in situ reduction of metal precursors on the surface of GO [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77]79,80]. For magnetic materials, metal precursors, including FeCl 2 , FeCl 3 , Fe(acac) 3 , (NH 4 ) 2 Fe(SO 4 ) 2 and more, which would bind with GO surfaces for electrostatic interactions between positive charges of metal ions with negative charges of groups on GO surfaces.…”

“…In addition, the high specific surface area property supported composites to load more AChE molecules for improving the sensitivity of dimethoate analysis with LOD of 0.18 μg•L −1 . Meanwhile, for revealing some biological or clinical processes, the determination and monitoring of some small molecules are urgently needed, such as H2O2, glucose, amino acids, hormones, and more [18,24,28,60,63,80]. For this aspect, Xin et al implemented determination of H2O2 by using graphene sheets (GS)-Nafion film and Fe3O4-Au nanoparticles coated horseradish peroxidase (HRP) modified SPE (SPE/GS-Nafion/Fe3O4-Au-HRP) electrode, which showed a low LOD of 1.2 × 10 −5 mol•L −1 [16].…”

Carbon Nanotubes, Graphene, and Carbon Dots as Electrochemical Biosensing Composites

“…An array of graphene and graphene oxide based sensing composites are listed in Table 1 [75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93]. Phenylketonuria (PKU) is a condition resulting from a defect in the enzyme phenylalanine hydroxylase (PAH), preventing the metabolism of phenylalanine.…”