In-Flight Tuning of Au–Sn Nanoparticle Properties

• DOI: 10.1021/acs.langmuir.4c01656
• Publication Date: 2024-07-26T19:08:44Z
• Authors: Pau Ternero; Calle Preger; Axel Christian Er...; Jenny Rissler; Julia-Maria Hübner; Maria E. Messing
• Keywords: Bimetallic strip; Particle (ecology)

Multimetallic nanoparticles possess a variety of beneficial properties with potential relevance for various applications. These metallic can consist randomly ordered alloys, which retain the constituting elements, or intermetallics, extended properties. Depending on desired application, specific alloys intermetallic compounds are required. However, it remains challenging to achieve particular morphologies, crystal structures, chemical compositions, and particle sizes because inherent complexity nanoparticle synthesis. In this work, Au-Sn were synthesized using continuous one-step gas-phase synthesis method that offers possibility anneal in flight directly after generation tune their The bimetallic model system Au-Sn, comprising both compounds, was studied temperature range 300 1100 °C. Au/Sn ratio be adjusted in-flight annealing between 70/30 40/60 atomic %. While Au-rich obtained at lower temperatures, increase leads formation more Sn-rich phases. Surface size effects greatly influence morphologies phase fractions. This research opens new opportunities customized by adjustment selection.