Local deposition of anisotropic nanoparticles using scanning electrochemical microscopy (SECM).

Citation:

Roman G Fedorov and Mandler, Daniel. . 2013. “Local Deposition Of Anisotropic Nanoparticles Using Scanning Electrochemical Microscopy (Secm).”. Phys. Chem. Chem. Phys.physical Chemistry Chemical Physics, 15, Pp. 2725 - 2732.

Abstract:

We demonstrate localized electrodeposition of anisotropic metal nanoobjects, namely Au nanorods (GNR), on indium tin oxide (ITO) using scanning electrochem. microscopy (SECM). A gold microelectrode was the source of the gold ions whereby double pulse chronoamperometry was employed to generate initially Au seeds which were further grown under controlled conditions. The distance between the microelectrode and the ITO surface as well as the different exptl. parameters (electrodeposition regime, soln. compn. and temp.) were optimized to produce faceted gold seeds with the required characteristics (size and distribution). Colloidal chem. synthesis was successfully exploited for better understanding the role of the surfactant and different additives in breaking the crystallog. symmetry and anisotropic growth of GNR. Expts. performed in a conventional three-electrode cell revealed the most appropriate electrochem. conditions allowing high yield synthesis of nanorods with well-defined shape as well as nanocubes and bipyramids. [on SciFinder(R)]