Gold nanoparticle arrays for the voltammetric sensing of dopamine

Selective Detection of Dopamine Using Glassy Carbon Electrode Modified by a Combined Electropolymerized Permselective Film of Polytyramine and Polypyrrole‐1‐propionic Acid

“…Various approaches have been applied to overcome these difficulties, i.e. pretreated electrodes [20 -21], self-assembled monolayers [22] and metal nanoparticle arrays [23]. However, a preconcentration step is still a prerequisite since these procedures are based on adsorption phenomenon or electrostatic interaction.…”

Lack of nano size effect on electrochemistry of dopamine at a gold nanoparticle modified indium tin oxide electrode

“…Enhanced cathodic reaction of oxygen was observed on the nanoparticle-modified electrode over the bulk gold [6]. Pre-synthesized AuNPs were attached to gold disc electrodes via thiol linkers and utilized in the detection of dopamine [7], epinephrine [8], catechol [9], as well as in the electrochemical reduction of oxygen [10]. Gold nanoparticles were also loaded into a sol-gel film on a gold substrate to form a 3D nanoparticle assembly, and employed in the continuous monitoring of hydrazine [11].…”

Short-time preparation and electrochemical properties of a single layer of tetraoctylammonium bromide capped Au nanoparticles on dithiol self-assembled monolayer-modified Au electrode

“…To date, one of the most widely used AuNPs for the modification of electrode surface is citrate capped AuNPs (C-AuNPs) [14][15][16][17][18]. Immobilization of C-AuNPs was usually carried out by immersing the electrodes modified with suitable linker molecules into the colloidal solution of C-AuNPs for longer than 12 h [9,12,[14][15][16][17][18]. It was found that even after 12 h immersion, a complete coverage of AuNPs was not achieved using C-AuNPs due to repulsive forces in between the surface confined AuNPs and also with free AuNPs in solution [16].…”