ZB 10 - Soft Condensed Matter (R. Holyst)

Electrodeposition of Well-Adhered Multifarious Au Particles at a SolidlToluenelAqueous Electrolyte Three-Phase Junction

Author(s): Kaminska, Izabela and Jonsson-Niedziolka, Martin and Kaminska, Agnieszka Pisarek, Marcin and Holyst, Robert and Opallo, Marcin and Niedziolka-Jonsson, Joanna
Title: Electrodeposition of Well-Adhered Multifarious Au Particles at a SolidlToluenelAqueous Electrolyte Three-Phase Junction
Abstract: In order to obtain uniform and reproducible surface enhanced Raman (SERS) platforms, a novel method for deposition of well multifarious gold particles on a tin doped indium oxide through electrogeneration at an electrode gold compound, in three-phase junction was developed. The was carried out both by double-potential-step with one pulse for nucleation and I one for growth of particles, and by potentiostatic single-potential-step Both procedures give angular, multifarious Au with a diameter of 150 +/- 40 nm. The size of the particles is of deposition time, after an initial growth phase, and by the formation of a microemulsion at the three-phase The particles are likely deposited from the microdioplets and size is determined by the amount of gold salt in a droplet The involves electoreduction of tetraoctylammonium at the tin doped indium oxide electrode followed by transfer across the liquidlliquid interface. The Au particles are adhered to the electrode surface. the Au particle covered enhances Raman scattering on the order of 10(5)-10(5) times malachite green isothiocyanate. Surface enhanced Raman spectroscopy reveal that the reproducibility of the Au particle deposit is both between samples (<15\% RSD) and across a single sample RSD). The obtained nanoparticulate deposit was also demonstrated to show electrocatalytic activity toward dioxygen reduction.
Pages: 22476-22485
Journal: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 116
ID: ISI:000310121000047
Year: 2012
DOI: 10.1021/jp307674k