SHAPE DEPENDENCE OF ELECTRON TRANSFER KINETICS AT NANOMETER SIZED FILMS

Bilayers of gold nanostars (AuNSs) and spherical gold nanoparticles (AuNPs) were fabricated by a self-assembly method based on covalent interactions. 1,5Pentanedithiol was used as cross-linker molecule for the covalent self-assembly of the nanomaterials on gold electrodes. Electrochemistry of [Fe(CN6)]3-/4- at the gold nanostar modified electrode reveals charge accumulation and excellent electrocatalytic properties of AuNSs with great sensing potential whereas the redox process at the spherical gold nanoparticles modified electrode reveals an irreversible process.