Ether-like Si-Ge hydrides for applications in synthesis of nanostructured semiconductors and dielectrics
Dalton Transactions, ISSN: 1477-9226, Issue: 34, Page: 6773-6782
2009
- 3Citations
- 8Captures
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Article Description
Hydrolysis reactions of silyl-germyl triflates are used to produce ether-like Si-Ge hydride compounds including HSiOSiH and the previously unknown O(SiHGeH). The structural, energetic and vibrational properties of the latter were investigated by experimental and quantum chemical simulation methods. A combined Raman, infrared and theoretical analysis indicated that the compound consists of an equal mixture of linear and gauche isomers in analogy to the butane-like H GeSiHSiHGeH with an exceedingly small torsional barrier of ∼0.2 kcal mol. This is also corroborated by thermochemistry simulations which indicate that the energy difference between the isomers is less than 1 kcal mol. Proof-of-principle depositions of O(SiHGeH) at 500 °C on Si(100) yielded nearly stoichiometric SiGe O materials, closely reflecting the composition of the molecular core. A complete characterization of the film by RBS, XTEM, Raman and IR ellipsometry revealed the presence of SiGe quantum dots embedded within an amorphous matrix of Si-Ge-O suboxide, as required for the fabrication of high performance nonvolatile memory devices. The use of readily available starting materials coupled with facile purification and high yields also makes the above molecular approach an attractive synthesis route to HSiOSiH with industrial applications in the formation of Si-O-N high-k gate materials in high-mobility SiGe based transistors. © The Royal Society of Chemistry 2009.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=69149104247&origin=inward; http://dx.doi.org/10.1039/b908280h; http://www.ncbi.nlm.nih.gov/pubmed/19690688; https://xlink.rsc.org/?DOI=b908280h; https://dx.doi.org/10.1039/b908280h; https://pubs.rsc.org/en/content/articlelanding/2009/dt/b908280h
Royal Society of Chemistry (RSC)
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