Abstract
Patterning of metallic nanoparticles (NPs) via BC micelles plays an important role in the manufacture of conductive integrated devices. BCs containing a metal-binding block of poly(vinylpyridine) (P2VP or P4VP) can be used as a direct chemical reagent to coordinate to or to be protonated by metal ions and compounds such as chloroplatinic acid (H2PtCl6) or auric acid (HAuCl4). In this work, Platinum nanoparticles (Pt NPs) were synthesized by dip-coated technique on titanium wafers. The dip-coating withdrawal rate and concentration of H2PtCl6 precursor had been investigated as two of most important factors on the morphology of Pt-NP arrays. The result shows that diameter of nanodots decreases with the increase of withdrawal rate. The initial ECSA and durability of the Pt/Ti catalysts, with an initial ECSA of 106.5 m2.g-1 and a nearly zero particle-aggregation during 3000-cycle CV, can be controlled through particle size and spacing.
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