An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of <i>N</i>‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

Gold star (AuST), which is one of the important anisotropic gold structures, finds applications in catalysis, sensing, and photothermal therapy by virtue its branches high aspect ratio. The preparation AuSTs can prove challenging as it requires stringent reaction condition(s) solution composition including various chemical additives, are not suitable for either disposal environment or use health-related studies. Furthermore, these additives often cover surface hence cause interferences AuSTs. In this work, we have reported a proof concept preparing monodispersed size on glassy carbon electrodes developing simple electrosynthesis method using an aqueous acid chloroauric absence any additive, structure-directing surface-protecting agent. This strategy was developed understanding corresponding electrocrystallization mechanism designing potentiostatic pulse strategy. current response per unit area content oxidation N-Acetyl-L-cysteine found to be superior compared widely used citrate-capped nanoparticles (cit-AuNPs) bare gold.