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Uncertainty in Measurement: Accuracy and Precision

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Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing

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Alloy Clusters: Precise Synthesis and Mixing Effects.

Sakiat Hossain¹, Yoshiki Niihori¹, Lakshmi V Nair¹

¹Department of Applied Chemistry, Faculty of Science , Tokyo University of Science , 1-3 Kagurazaka , Shinjuku-ku, Tokyo 162-8601 , Japan.

Accounts of Chemical Research

|November 22, 2018

Summary

This summary is machine-generated.

Researchers developed precise synthesis methods for alloy clusters, enabling control over elemental composition and revealing synergistic effects for new nanomaterials.

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Area of Science:

Nanomaterials Science
Inorganic Chemistry
Physical Chemistry

Background:

Metal alloys offer unique functionalities compared to single metals, driving interest in alloy nanoparticles for novel nanomaterials.
Thiolate-protected (SR) alloy clusters are ideal for studying mixing and synergistic effects due to their stability and synthetic accessibility.

Purpose of the Study:

To establish precise synthesis methods for SR-protected alloy clusters.
To elucidate the mixing and synergistic effects of elemental substitution in alloy clusters.
To develop design guidelines for new functional nanomaterials based on alloy clusters.

Main Methods:

Synthesis of SR-protected alloy clusters with controlled elemental composition, including gold clusters substituted with palladium, silver, or copper.
Characterization of alloy clusters to understand the impact of elemental substitution on electronic structure, physical, and chemical properties.
Development of methods for atomic precision control over the number of substitutions and synthesis of heterometal core alloy clusters.

Main Results:

Demonstrated that different elements (Pd, Ag, Cu) substitute at distinct sites within gold clusters.
Achieved atomic precision control over silver substitution in [Au25-xAgx(SR)18]- clusters, clarifying the impact on electronic structure.
Showcased that effects of multiple elemental substitutions can be superimposed by utilizing different preferential substitution sites.
Successfully synthesized alloy clusters featuring a heterometal core.

Conclusions:

Precise synthesis and characterization of alloy clusters provide fundamental insights into mixing and synergistic effects.
Controlled elemental substitution in alloy clusters allows for tuning of properties and potential applications.
Developed methodologies pave the way for rational design of advanced functional nanomaterials.