Ordering and Self-organization in Nanocrystalline Silicon

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Proceedings titleBulletin of the American Physical Society: March Meeting 2001
ConferenceAmerican Physical Society, Annual March Meeting, 12-16 March 2001, Seattle, Washington, USA
AbstractThe fabrication of size-controlled Si nanocrystals encapsulated by SiO2 is complicated by the amorphous nature of SiO2 and the mismatch in their thermal expansion coefficients. A preferred crystallographic orientation is especially important for Si quantum dots because of the Si indirect-gap band structure and a strong anisotropy in the energy-momentum dispersion. We report self-organization in Si nanocrystals fabricated by the crystallization of nanometer-thick layers of amorphous Si confined between SiO2 layers. Si nanoparticles larger than 8 nm spontaneously form brick-shaped crystallites oriented along the [111] direction. The preferred orientation and distinct shape result in a relatively narrow luminescence. The observed ordering and self-organization is an important step toward reproducible maskless Si nanofabrication and the consequent construction of Si/SiO2 quantum devices.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12346526
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Record identifier1b3eb9f6-b6ef-44b3-b43c-7b9882bb1ad9
Record created2009-09-17
Record modified2016-05-09
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