Grafted Azure A modified electrodes as disposable β-nicotinamide adenine dinucleotide sensors

Effective monitoring of the electro-Fenton degradation of phenolic derivatives by differential pulse voltammetry on multi-walled-carbon nanotubes modified screen-printed carbon electrodes

“…The peak current of m-Cresol decreases with continued potential cycling and this peak fully disappears at the voltammetric scan number 10. This behaviour is consistent with the formation of an insoluble polymer film resulting in passivation of the electrode [43][44][45]. If the solution is removed from the MWCNT-SPCE surface, rinsed with water, and a fresh 50L of 0.1 M PBS at pH 2 is placed on the electrode surface, a voltammetric peak of m-Cresol is observed, with a peak current equivalent to the high of peak at scan number 5 in Fig.…”

Scaffold electrodes based on thioctic acid-capped gold nanoparticles coordinated Alcohol Dehydrogenase and Azure A films for high performance biosensor

“…AA film SPCE modification was carried out as previously described [18] (a detailed procedure can be found in the supporting information). The modified AA/SPCEs were allowed to dry at room temperature and stored protected from light at 4°C until use.…”

“…The large overvoltage intrinsic with the NADH oxidation onto solid electrodes is due to the formation of no electroactive oxidation products that rapidly adsorb on the electrode surface fouling it [15,16]. To overcome this problem, the electrode surface can be modified with substances capable to act as redox mediators reducing the overpotential [18][19][20][21][22]. Other approaches to prevent the electrode fouling are based on the modification of electrode surface with carbon nanotubes or graphene sheets [23][24][25][26].…”

“…Such modified electrodes show a potent and persistent electrocatalytic effect to the oxidation of NADH [18]. Moreover, it has been reported that electrodes modified with phenothiazine dyes show a strong affinity for proteins and DNA [27].…”

Controlled Zn‐Mediated Grafting of Thin Layers of Bipodal Diazonium Salt on Gold and Carbon Substrates

“…[3] Initially, the majority of reports focused on the grafting of diazonium salts on carbon, [4][5][6][7] but since then this mechanism has been expanded to different metal substrates including, copper, [8] nickel, [8,9] zinc, [8,9] iron, [8][9][10][11] gold, [12] indium oxide, [13] and semiconductors. [14] These diazonium-grafted surfaces have found widespread application in diverse areas such as sensors, [15,16] catalysis, [17] nanotubes, [18] and anti-corrosive agents. [10,11] The stability of electrografted diazonium layers is well known and can be attributed to the CÀC and metal-C covalent bond between the aryl groups and carbon or metal surfaces, respectively.…”