Nanocrystalline materials: recent advances in crystallographic characterization techniques.

Area of Science:

• Materials Science
• Nanotechnology
• Crystallography

Background:

• Nanocrystalline material properties, including optical, mechanical, electronic, and catalytic, are highly shape-dependent.
• Localized surface plasmon resonance (LSPR) and catalytic activity of nanoparticles like palladium (Pd) exemplify this shape dependency.
• Controlling and characterizing nanocrystal shape and structure is crucial for their practical applications.

Purpose of the Study:

• To provide an overview of techniques, concepts, and advances in understanding and controlling nanocrystal shapes.
• To address how nanoshapes are created, their relation to atomic packing and crystallography, and methods for characterization.
• To discuss the influence of seed crystallography on synthesis and shape prediction.

Main Methods:

• Discussion of nucleation and growth processes in nanocrystal synthesis.
• Overview of shape prediction models incorporating seed crystallography, thermodynamic, and kinetic parameters.
• Examination of crystallographic implications in epitaxy and orientation for core-shell nanoparticles.
• Review of novel, spatially resolved analysis tools for characterization.

Main Results:

• Nanocrystal properties are tunable via shape control, impacting LSPR and catalytic functions.
• Seed crystallography significantly influences the final product's shape and properties.
• Shape prediction models offer insights into controlling synthesis outcomes.
• Advanced characterization tools enable detailed analysis of nanocrystal structure and morphology.

Conclusions:

• Understanding the interplay between crystallography, synthesis, and shape is key to harnessing nanocrystal properties.
• Advances in synthesis and characterization techniques facilitate precise control over nanocrystal morphology.
• This knowledge is vital for optimizing nanocrystals in diverse applications, from optics to catalysis.