One-Pot Approach for Acoustic Directed Assembly of Metallic and Composite Microstructures by Metal Ion Reduction

Acoustic-directed assembly is a modular and flexible bottom-up technique with the potential to pattern a wide range of materials. Standing acoustic waves have been previously employed for patterning preformed metal particles, however, direct patterning of metallic structures from precursors remains...

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Bibliographic Details
Published inarXiv.org
Main Authors Kenigsberg, Avraham, Peleg-Levy, Heli, Sazan, Haim, Piperno, Silvia, Kenigsberg, Liron, Shpaisman, Hagay
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 11.12.2023
Subjects
Acoustic waves
Acoustics
Assembly
Chemical reactions
Composite structures
Metal particles
Microstructure
Multilayers
Nanoparticles
Patterning
Piezoelectricity
Precursors
Reaction products
Reducing agents
Standing waves
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Summary:Acoustic-directed assembly is a modular and flexible bottom-up technique with the potential to pattern a wide range of materials. Standing acoustic waves have been previously employed for patterning preformed metal particles, however, direct patterning of metallic structures from precursors remains unexplored. Here, we investigate utilization of standing waves to exert control over chemical reaction products, while also exploring their potential in the formation of multi-layered and composite micro-structures. Periodic metallic micro-structures were formed in a single step, simplifying microstructure fabrication. Concentric structures were obtained by introducing a metal precursor salt and a reducing agent into a cylindrical piezoelectric resonator that also served as a reservoir. In addition, we introduce an innovative approach to directly fabricate metallic multi-layer and composite structures by reducing different metal ions or adding nanoparticles during the reduction step. Fewer steps are needed, compared with other methods, and there is no need to stabilize the nanoparticles or to ensure chemical affinity between the metallic matrix and inorganic nanoparticles. This innovative approach is promising for production of complex microstructures with enhanced functionality and controlled properties.
ISSN:2331-8422