Nitrobenzoic acid-functionalized gold nanoparticles: DET promoter of multicopper oxidases and electrocatalyst for NAD-dependent glucose dehydrogenase

Carbon-Dot-Decorated Silver and Gold Nanocomposites for Antibacterial Activity and Degradation of Organic Dyes

“…Generally, AuNPs have been synthesized by in situ reduction of chloroauric acid (HAuCl 4 ) by using various reducing agents like trisodium citrate and hydrazine and followed by stabilizers like polyethylenimine (PEI) and poly­(vinyl alcohol) (PVA), which are toxic to the ecosystem. Lalaoui et al synthesized functionalized gold nanoparticles using the capping agent 5,5 -dithiol-bis (2-nitrobenzoic acid) in methanol and the addition of the reducing agent NaBH 4 , which makes the process complex and toxic . Moreover, the shape-directing agents used, including cetyltrimethyl­ammonium bromide (CTAB), hexadecyltrimethyl­ammonium chloride (CTAC), and polyvinyl­pyrrolidone (PVP), are also toxic and can adsorb strongly onto the surface of AuNPs, making them difficult to remove, which limits their application.…”

“…Lalaoui et al synthesized functionalized gold nanoparticles using the capping agent 5,5 -dithiol-bis (2-nitrobenzoic acid) in methanol and the addition of the reducing agent NaBH 4 , which makes the process complex and toxic. 19 Moreover, the shape-directing agents used, including cetyltrimethylammonium bromide (CTAB), hexadecyltrimethylammonium chloride (CTAC), 20 and polyvinylpyrrolidone (PVP), are also toxic and can adsorb strongly onto the surface of AuNPs, making them difficult to remove, which limits their application. Farmani et al synthesized graphene quantum dot conjugated cysteaminefunctionalized gold nanoparticles for sensing the hazardous dye Erythrosine B via two-step methods.…”

Interaction between bilirubin oxidase and Au nanoparticles distributed over dimpled titanium foil towards oxygen reduction reaction

“…One challenge remains the electron channeling from the electrode to the Cu T1 binding site of immobilized enzymes. Gold and carbon-based are the most popular electrode materials for such efficient immobilization [12][13][14][15][16]. Further application of nanomaterials such as carbon nanotubes, nanoporous gold and gold nanopartic les (AuNP), increases surface area, hence potential anchorage sites for enzyme immobilizatio n, leading to enhanced catalytic currents.…”

Electrode Nanopatterning for Bioelectroanalysis and Bioelectrocatalysis

“…Redox enzymes are very active and extremely selective catalysts toward specific reactions allowing their use in bioelectrochemical devices such as biosensors, bioreactors, bioelectrolyzers or biofuel cells [1][2][3][4] . Gold and carbon-based electrodes are the most popular materials for their efficient immobilization [5][6][7][8][9] . These materials can be easily chemically modified to introduce functional groups on their surface and tune the interfacial properties for the grafting of enzymes in a conformation suitable for electrocatalysis.…”