Highly monodisperse bismuth nanoparticles and their three-dimensional superlattices

Area of Science:

• Materials Science
• Nanotechnology
• Inorganic Chemistry

Background:

• Bismuth nanoparticles (Bi NPs) are of interest due to their unique properties.
• Controlling the size and uniformity of Bi NPs is crucial for their applications.
• Ligand protection is essential for nanoparticle stability and processability.

Purpose of the Study:

• To report a simple and reproducible synthesis method for monodisperse, ligand-protected bismuth nanoparticles (Bi NPs).
• To demonstrate control over Bi NP size (11–22 nm) primarily through reaction temperature.
• To showcase the self-assembly capabilities of uniform Bi NPs into ordered superstructures.

Main Methods:

• Synthesis of bismuth nanoparticles (Bi NPs) using a straightforward and reproducible method.
• Control of nanoparticle size and shape through precise regulation of reaction temperature.
• Characterization of nanoparticle monodispersity, crystallinity, and ligand protection.

Main Results:

• Achieved highly monodisperse and ligand-protected bismuth nanoparticles (Bi NPs).
• Successfully controlled the size of single-crystalline, spherical Bi NPs between 11 and 22 nm by adjusting reaction temperature.
• Demonstrated the ability of uniform Bi NPs to self-assemble into long-range-ordered 2D and 3D superstructures.

Conclusions:

• A facile and scalable method for producing uniform bismuth nanoparticles is established.
• Reaction temperature is a key parameter for tuning Bi NP size, enabling precise control.
• The high uniformity and self-assembly properties of these Bi NPs open avenues for advanced nanomaterials fabrication.