Precision Synthesis of Bimetallic Nanoparticles via Fluidic Control in Nanopipettes

Precision Synthesis of Bimetallic Nanoparticles via Fluidic Control in Nanopipettes

Monday, February 26, 2024 4:20 PM to 4:40 PM · 20 min. (America/Vancouver)
Room 25A
Organized Session
Instrumentation & Nanoscience

Information

Bimetallic nanoparticles often exhibit superior and unique properties compared to their single-component counterparts. Nevertheless, navigating the extensive parameter space, encompassing size, structure, composition, and spatial arrangement, poses a significant challenge when seeking the ideal alloy nanoparticles for specific applications. The pursuit of high-throughput techniques capable of precisely controlling both the composition and spatial organization of these nanoparticles has become imperative to expedite materials discovery. In this presentation, I will describe an approach leveraging the nanofluidics in a dual-channel nanopipette to finely regulate the electrodeposition rate of each element, thereby determining the composition of the nanoparticles. We substantiate this composition control through finite element simulations and thorough electrochemical and elemental analyses. Our investigations encompass various particles, including Cu-Ag, Pt-Cu, Au-Pt, Cu-Pb, and Co-Ni alloys. Furthermore, we demonstrate the precision of surface patterning using Cu-Ag alloys, showcasing our ability to precisely dictate both location and composition at each pixel. Importantly, this methodology holds broad applicability for synthesizing metal nanoparticles amenable to electrodeposition, thus laying the foundation for developing automated synthesis and screening systems, driving accelerated material discovery in electrocatalysis.
Day of Week
Monday
Session or Presentation
Presentation
Session Number
OC-13-06
Application
Material Science
Methodology
Electrochemistry
Primary Focus
Methodology

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