Novel heterostructured nanoparticle was synthesized by the deposition of Ag on Pt cube by overcoming lattice mismatch, where Ag deposition preferentially occurred at corners of Pt cube. HRTEM image and EDX line-scan profiles on a single Pt cube with Ag deposits confirm the preferential deposition of Ag at corners of Pt cube. The mechanism of such site specific deposition of Ag was discussed in relation to I- (shape forming agent) and succinate (organic protective agent). Negative circumstance formed by I- and succinate accumulate Ag+ around Pt seeds. Accumulated Ag+ adsorb on Pt{111} of truncated cube because Pt{100} is preoccupied by I- and succinate resulting in site specific deposition of Ag on corners of Pt cube. Such controlled deposition of second component on shape-regulated core will lead to unique physical and chemical properties not realized so far; e.g., masking or creating active sites at the corner as a catalyst model.

Site specific deposition of Ag on the corners of Pt cube

243rd National Meeting (2012)

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