Third Microsymposium of the "International Scholarship Program for Graduate Studies in Faculty of Chemistry, University of Warsaw - From simple molecules to nanostructured and bioactive materials" October 6 - 8th, 2011, Palace in Łochów, Poland
Chronicle
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Friday Oct. 7th
15:30 - 16:00 - Sebastian Wojtysiak Silver-platinum core-shell nanoparticles for surface-enhanced Raman spectroscopy Using silver (I) nitrate (V), trisodium citrate and/or sodium borohydride (in systematically changed ratios) various samples of silver nanoparticles in water sol were synthesised. Some of those samples were chosen (after characterisation and SERS measurements) to serve as "seeds" in seed-growth synthesis of Ag@Pt core-shell nanoparticles. Both Ag and Ag@Pt nanoparticles were characterised by microscopic and spectroscopic methods (TEM, UV-Vis, SERS). Average SERS enhancement factor on Ag@Pt was comparable with best up to now results for platinum. Modification of Pt layer visible from spectroscopic results (5 cm-1 shift of adsorbed pyrydine oscillation band) justified further electrochemical research for possible electrocatalytic applications. 
Discussion 
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