In this presentation we take advantage of atomic interdiffusion at nanoparticle interfaces to fabricate core/alloy and core/alloy/shell nanoparticles. Modest temperatures changes were found to have profound effects for the interfacial alloying of the confined nanosystem.  The alloy formation and subsequent interdiffusion allowed us to tailor nanoparticle composition and ultrastructure, as well as surface plasmon response.  This processing step, which involves the layer-by-layer formation of core/alloy/shell morphology, utilizes hydrothermal annealing provided by automated microwave irradiation to control solute deposition, as well as alloy thickness.  Nanostructure morphology was characterized by TEM and STEM, and composition analysis was performed via selective area EDX, and XPS. A proposed mechanism is described, which involves the competition between two growth models; a classical ripening system at low temperature, and a self-limiting growth at high temperature

Synthesis and processing of core/alloy nanoparticles: Tunable optical properties and evidence for self-limiting alloy growth

244th National Meeting (2012)

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