Rational Synthesis of Heterostructured Nanoparticles with Morphology Control

摘要

Abstract: Rational synthesis of Pt Aun nanoparticles (NPs) has been achieved by overgrowing Au on Ptnwith n, the number of Pt Au heterojunctions in each particle, controlled from 1 to 4, and the correspondingnNPs in pear-, peanut-, or clover-like morphology. Monte Carlo simulation reveals that the morphology controlncan be correlated to a thermodynamic equilibrium of the Au coherence energy, the overall particle surfacenenergy, and the heterogeneous Pt Au interfacial energy in the composite system, which is manipulatednby the seeding particle size and solvent polarity. The developed synthetic strategy together with the providednfundamental understanding of heterogeneous nucleation and heterostructure growth could have greatnpotential toward the rational synthesis of composite nanomaterials with morphology control for advancedncatalytic and other functional applications.