Size classification of silicon nanocrystals
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چکیده
منابع مشابه
Size classification of silicon nanocrystals
We report on the synthesis of size-classified silicon nanocrystals by differential mobility classification of a polydisperse ultrafine silicon aerosol. Using the described technique, the average nanocrystal size can be tuned by simply adjusting an electric field. Samples of nonagglomerated silicon nanocrystals have been obtained and size control has been achieved within 15%–20% in the 2–10 nm s...
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Silicon has many advantages over other semiconductor materials: low cost, nontoxicity, practically unlimited availability, and decades of experience in purification, growth and device fabrication. It is used for almost all modern electronic devices. However, the indirect energy gap in bulk crystalline Si makes it unable to emit light efficiently and thus unsuitable for optoelectronic applicatio...
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Silicon nanocrystals embedded in SiO2 were isolated with a selective etching procedure, and the isolated nanocrystals’ excitonic emission energy was studied during controlled oxidation. Nanocrystals having initial diameters, d0, of ,2.9–3.4 nm showed a photoluminescence sPLd blueshift upon oxidatively induced size reduction, as expected from models of quantum confinement. Oxidation of smaller S...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 1996
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.115811