e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
Conference -ISSS-8-
Formation of Si-based Nanosheet Bundles and Morphological Modication of CaSi2 Crystals by Thermal Treatment Using Chloride Compounds
Xiang MengPeiling YuanYasuhiro HayakawaKenta SasakiKeisuke TsukamotoShinya KusazakiYuya SaitoYuki KumazawaHirokazu Tatsuoka
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2018 Volume 16 Pages 218-224

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Abstract

Si-based nanosheet bundles were formed by Ca-atom extraction from CaSi2 crystals by thermal treatment using FeCl2, FeCl3, NH4Cl, and MgCl2. The morphological property of the Si-based nanosheet bundles was examined. Though the Si-based nanosheets were formed under the stated thermal treatment conditions using FeCl3, the formation of iron-oxide phases was accelerated at higher temperatures and longer duration times for the highest thermal treatment temperatures using FeCl2. Thinner and thicker nanosheets were obtained using NH4Cl and MgCl2, respectively. The morphological properties of the Si-based nanosheet bundles were compared to each other and their formation mechanism was discussed in terms of the thermal instability of the chlorides, their vapor pressure and thermal treatment temperature profiles. [DOI: 10.1380/ejssnt.2018.218]

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