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Updated: Jul 9, 2026

Fabrication and Optimization of Type II Silicon Clathrate Films

Fabrication and Optimization of Type II Silicon Clathrate Films

Published on: October 14, 2025

Silicon subiodide clusters.

Andriy Dmytruk¹, Yeon-Su Park, Atsuo Kasuya

¹Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan.

Journal of Nanoscience and Nanotechnology

|December 1, 2007

Summary

Researchers explored silicon subiodide clusters using mass spectroscopy and ab initio calculations. They discovered that iodine acts as a stable terminator for silicon clusters, influencing their chain, ring, and cage structures.

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Area of Science:

Materials Science
Computational Chemistry
Physical Chemistry

Background:

Silicon clusters are fundamental units in materials science.
Understanding cluster structure and stability is crucial for developing new silicon-based materials.
The role of terminating atoms in silicon cluster formation is an active area of research.

Purpose of the Study:

To investigate the structural properties of silicon subiodide clusters (Si(n)I(m)).
To determine the influence of cluster size (n=1-20) on the structural motifs.
To explore the potential of iodine as a stabilizing agent for silicon clusters.

Main Methods:

Laser ablation of silicone tetraiodide to produce silicon subiodide clusters.
Time-of-flight mass spectroscopy for cluster identification and characterization.
Ab initio calculations for theoretical structure elucidation and stability analysis.

Main Results:

Observed a size-dependent structural transition: chain structures for n <= 6, ring structures for 6 < n < 16, and cage structures for n >= 16.
Experimental and theoretical data confirmed the formation of distinct structural families.
Identified iodine as an effective terminator for silicon clusters, similar to hydrogen.

Conclusions:

Silicon subiodide clusters exhibit size-driven structural diversity.
Iodine termination contributes to the stability of silicon clusters.
The findings provide insights into the synthesis and properties of novel silicon-iodine materials.