Fusion growth patterns in atomically precise metal nanoclusters.

Area of Science:

• * Nanoscience and Nanotechnology
• * Inorganic Chemistry
• * Materials Science

Background:

• * Atomically precise nanoclusters (1-3 nm) of coinage metals fill the size gap between small molecules and nanoparticles.
• * Their intermediate size leads to unique physicochemical properties and quantum confinement effects, altering optical properties like plasmon resonance.
• * Nanoclusters typically feature a core kernel and a protective shell, with kernel structure being a major research focus.

Purpose of the Study:

• * To review recent advancements in understanding the growth patterns of atomically precise coinage metal nanoclusters.
• * To elucidate the fundamental building blocks and aggregation mechanisms governing nanocluster kernel formation.
• * To connect kernel evolution with changes in electronic structure and optical characteristics.

Main Methods:

• * Review of recent scientific literature on coinage metal nanocluster synthesis and characterization.
• * Analysis of reported kernel configurations, including common polyhedral units (M4, M13, M14).
• * Examination of identified growth pathways, such as vertex/face sharing, strand growth, cyclic fusion, and cubic patterns.

Main Results:

• * Identification of fundamental kernel units, notably the tetrahedral M4 and icosahedral M13 polyhedrons.
• * Elucidation of various aggregation modes (vertex/face sharing, strand growth, cyclic fusion, cubic growth) used to construct larger kernels.
• * Correlation between specific kernel growth pathways and the evolution of nanocluster electronic and optical properties.

Conclusions:

• * Understanding kernel growth pathways is crucial for controlling nanocluster properties.
• * Basic polyhedral units serve as building blocks for complex nanocluster architectures.
• * This knowledge advances the fundamental science of nanomaterials and their applications.