Self-assembled perylene-tetracarboxylic acid/multi-walled carbon nanotube adducts based modification of screen-printed interface for efficient enzyme immobilization towards glucose biosensing

Nickel -doped iron oxide nanoparticle-conjugated porphyrin interface (porphyrin/Fe2O3@Ni) for the non-enzymatic detection of dopamine from lacrimal fluid

“…The electrochemical active surface areas (EASA) of the fabricated GPEs were calculated using the Rendles–Sevick equation as follows: 45 I p = 2.69 × 10 5 An 3/2 D 1/2 red C × ν 1/2 where, I p , A and n represent the anodic peak current, EASA, and the number of electrons involved in the oxidation or reduction of potassium ferro/ferricyanide, i.e. , 1.…”

“…Without ultra-sonication, there are fewer chances for electrostatic interactions and nanohybrid formation since there is not enough kinetic energy. 31,32…”

“…Without ultra-sonication, there are fewer chances for electrostatic interactions and nanohybrid formation since there is not enough kinetic energy. 31,32 Fabrication of the working electrode, and electrochemical studies For the typical fabrication of the working interface, 1 mg of Fe 2 O 3 , Fe 2 O 3 @Ni, and porphyrin + Fe 2 O 3 @Ni (1 : 1) was added to 1 mL of distilled water, ethanol and ethanol : water, respectively. These mixtures were then ultra-sonicated for 15 minutes to obtain homogeneous dispersions.…”

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

“…2A(d) . The electrochemical active surface areas (ECSAs) of the designed electrodes were calculated using the Randles–Sevcik equation as follows: 40 I p = 2.69 × 10 5 An 3/2 D red 1/2 C * ν 1/2 where I p , D red , and A correspond to the anodic peak current, diffusion coefficient of potassium ferrocyanide (7.6 × 10 −6 cm 2 s −1 ) and electrochemical active surface area. While, ν , C and n represent the scan rate (100 × 10 −3 V), concentration of ferrocyanide (5 × 10 −3 M) and number of electrons involved in the oxidation or reduction of potassium ferro/ferricyanide, which is 1 respectively.…”

Copper oxide integrated perylene diimide self-assembled graphitic pencil for robust non-enzymatic dopamine detection

“…In these lines, the exceptional n-type C-based N-containing semiconductor perylene diimide (PDI) has widely been reported for nano/ electrochemical assemblies. 15,16 PDI provides an easily functionalizable electron-attracting imide fragment with exceptional emissive, chromophoric and redox properties, especially for sensing applications. 17,18 All these characteristics lead to superior electrical, chemical, thermal and photostability of PDI, along with its exceptional conductivity and sensitivity.…”