Morphological and Structural Modifications of Si-Based Nanostructures Synthesized from Metal Silicide Templates in IP6, Acid and Metal Chloride Solutions

Abstract:

Powders consisting of Si-based nanostructures were synthesized by the extraction of Ca atoms from CaSi₂ powders using an inositol hexakisphosphate (IP6) aqueous solution. The raw CaSi₂ powders were simply immersed in a diluted IP6 solution, then dried. It is noted that the Si-based nanostructures were easily exfoliated from the powders to expose the surfaces corresponding to the Si {111} planes of the nanostructures. In addition, the Si-based nanostructures were also synthesized by metal atom extraction from SrSi₂, BaSi₂ and Mg₂Si using the IP6 aqueous solution. It was found that the nanostructures mainly including the amorphous Si-oxide phase were obtained for the IP6-treated SrSi₂, BaSi₂ and Mg₂Si powders. Moreover, the amorphous Si oxide-based nanostructures were synthesized from CaSi₂ using citric acid, malic acid, FeCl₃ and FeCl₂ aqueous solutions. It was demonstrated that the morphological and structural properties of the synthesized Si-based nanostructures depend on the silicide templates and the solutions.

• Periodical: Defect and Diffusion Forum (Volume 386)
• Pages: 61-67
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.386.61
• Online since: September 2018
• Authors: Yalei Huang, Peiling Yuan, Yuki Kumazawa, Shinya Kusazaki, Yuya Saito, Vimal Saxena, Kazuma Konishi, Yuya Kujime, Tubasa Kato, Kaito Tanaka, Yasuhiro Hayakawa, Hirokazu Tatsuoka*
• Keywords: CaSi₂, Nanosheets, Nanostructures, Si

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