ZB 06 - Nanoelectrochemistry (W.Nogala)

Tailored gold nanostructure arrays as catalysts for oxygen reduction in alkaline media and a single molecule SERS platform

Author(s): Nogala, Wojciech and Kannan, Palanisamy and Gawinkowski, Sylwester and Martin and Kominiak, Magdalena and Waluk, Jacek and Opallo, Marcin
Title: Tailored gold nanostructure arrays as catalysts for oxygen reduction in alkaline media and a single molecule SERS platform
Abstract: Although plenty of functional nanomaterials are widely applied in and technology, cost-efficient, controlled and reproducible of metallic nanostructures is a considerable challenge. electrorefining by scanning electrochemical microscopy (SECM) an effective approach to circumvent some drawbacks of homogeneous syntheses of nanoparticles, providing precise over the amount, time and place of reactant delivery. The is just a raw metal, which is the most economically viable This approach ensures reproducibility and the opportunity for of micropatterns, which can be rapidly analyzed by scanning techniques. Here, a cost-effective methodology for the preparation naked (ligand-free) metallic nanostructures, from polycrystalline using a moving microelectrode, is presented. Automated of bare gold on indium tin oxide (ITO) demonstrates the of this method to tune the size and shape of the The morphology of the obtained materials and thus their and plasmonic properties can be tuned using the parameters. Programmable fabrication of sample by microprinting followed by comparative SECM studies or analysis allows quick optimization and characterization specific purposes. Electrocatalytic oxygen reduction in alkaline and surface-enhanced Raman spectroscopy (SERS) of single porphycene molecules are presented as model examples.
Pages: 10767-10774
Journal: NANOSCALE
Publisher: ROYAL SOC CHEMISTRY
Addres: THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Volume: 7
ID: ISI:000356058600024
Year: 2015
DOI: 10.1039/c5nr02077h