Sila-fulleranes: promising chemically active fullerene analogs
Farah Marsusi1, Mohammad Qasemnazhand
1Department of Physics, Amirkabir University of Technology, PO Box 15875-4413, Tehran, Iran.
Nanotechnology
|June 1, 2016
Summary
Silicon fullerene cages exhibit sp(3) hybridization, influencing their electronic properties. Surface chemistry significantly tunes the band gap and chemical activity of these silicon nanostructures.
Area of Science:
- Computational Materials Science
- Solid-State Physics
- Quantum Chemistry
Background:
- Silicon fullerene cages are novel nanostructures with potential applications.
- Understanding their electronic properties and stability is crucial for material design.
Purpose of the Study:
- Investigate the geometry and electronic properties of bare and hydrogen-terminated Si60 fullerene.
- Analyze the factors influencing the band gap and chemical reactivity of silicon cages.
Main Methods:
- Density-functional theory (DFT) calculations.
- π-orbital axis analysis (POAV) to determine hybridization.
- Natural bond orbital (NBO) analysis for bond characterization.
Main Results:
- DFT predicts outward sites on bare Si60 due to sp(3) hybridization.
- Quantum confinement effect has a minor impact on band gap for Si-fullerenes between 1-1.7 nm.
- Cage geometry, symmetry, and pentagon rings significantly influence band gap and stability.
- Functionalized Si-cages show tunable electronic properties and high chemical activity.
Conclusions:
- Silicon fullerene cages exhibit significant sp(3) hybridization, impacting their electronic structure.
- Band gap and chemical activity are highly sensitive to surface functionalization, allowing for property tuning.
- Pentagon rings enhance cage stability compared to carbon analogs.
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