Growth and stability of oxidation resistant Si nanocrystals formed by decomposition of alkyl silanes

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The synthesis and characterization of 1-10 nm Si nanocrystals highly resistant to oxidation is described. The nanocrystals were prepared by thermal decomposition of tetramethylsilane at 680 C, or in a gold- induced catalytic process at lower temperatures down to 400-450 C using trioctylamine as an initial solvent. Transmission electron microscopic analysis of samples obtained in the presence of gold show that the nanocrystals form via solid-phase epitaxial attachment of Si to the gold crystal lattice. The results of computational modeling performed using first principles density functional theory (DFT) calculations predict that the enhanced stability of nanocrystals to oxidation is due ... continued below

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Zaitseva, N; Hamel, S; Dai, Z R; Saw, C; Williamson, A J & Galli, G January 12, 2007.

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The synthesis and characterization of 1-10 nm Si nanocrystals highly resistant to oxidation is described. The nanocrystals were prepared by thermal decomposition of tetramethylsilane at 680 C, or in a gold- induced catalytic process at lower temperatures down to 400-450 C using trioctylamine as an initial solvent. Transmission electron microscopic analysis of samples obtained in the presence of gold show that the nanocrystals form via solid-phase epitaxial attachment of Si to the gold crystal lattice. The results of computational modeling performed using first principles density functional theory (DFT) calculations predict that the enhanced stability of nanocrystals to oxidation is due to the presence of N or N-containing groups on the surface of nanocrystals.

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PDF-file: 28 pages; size: 2 Mbytes

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  • Journal Name: Journal of Physical Chemistry - C, vol. 112, no. 10, February 19, 2008, pp. 3585-3590; Journal Volume: 112; Journal Issue: 10

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  • Report No.: UCRL-JRNL-227339
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 940468
  • Archival Resource Key: ark:/67531/metadc898840

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  • January 12, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 8, 2016, 8:08 p.m.

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Zaitseva, N; Hamel, S; Dai, Z R; Saw, C; Williamson, A J & Galli, G. Growth and stability of oxidation resistant Si nanocrystals formed by decomposition of alkyl silanes, article, January 12, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc898840/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.