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Evolution of pseudo-spherical silicon nanocrystals to tetrahedra, mediated by phosphonic acid surfactants.

Date
2009
Abstract
Silicon nanocrystals were synthesised at high temperatures and high pressures by the thermolysis of diphenylsilane using a combination of supercritical carbon dioxide and phosphonic acid surfactants. Size and shape evolution from pseudo-spherical silicon nanocrystals to well faceted tetrahedral-shaped silicon crystals with edge lengths in the range of 30-400 nm were observed with sequentially decreasing surfactant chain lenghts. The silicon nanocrystals were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), photoluminescence (PL), scanning electron microscopy (SEM) and Raman scattering spectroscopy.
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Description
peer-reviewed
Publisher
IOP Publishing
Citation
Nanotechnology;20,275605
Collections
Bernal Institute
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2009%20Ryan%2C%20Kevin.pdf
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Keywords
nanocrystals, carbon dioxide
ULRR Identifiers
https://hdl.handle.net/10344/2023
 https://doi.org/10.34961/15070
Funding code
Funding Information
Science Foundation Ireland (SFI)
Sustainable Development Goals
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