Fine structural and photoluminescence properties of Mg2Si nanosheet bundles rooted on Si substrates
Fine structural and photoluminescence properties of Mg2Si nanosheet bundles rooted on Si substrates
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DOI：
10.35848/1347-4065/abdf23
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发表时间：
2020-09
影响因子：
1.5
通讯作者：
Tomoya Koga;R. Tamaki;Xiang Meng;Yushin Numazawa;Y. Shimura;N. Ahsan;Y. Okada;A. Ishida;H. T
中科院分区：
文献类型：
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作者：
Tomoya Koga;R. Tamaki;Xiang Meng;Yushin Numazawa;Y. Shimura;N. Ahsan;Y. Okada;A. Ishida;H. T
创建垂直排列的二维纳米结构是实现先进电子和光电材料的一种有前景的方法。在这项研究中，通过在 MgCl2/Mg 混合蒸汽中热退火，从生长在硅衬底上的 CaSi2 微壁中提取 Ca 原子，合成了 Mg2Si 纳米片束。纳米片束结构被修改为来自先前报道的硅纳米片束的复合纳米片束。观察到的 Mg2Si 纳米片由薄 Mg2Si 层组成，并且在纳米片束中实现了明确的细尺度 Mg2Si 超晶格结构。此外，还检查了拉曼散射和光致发光特性，并提出了与块状晶体相比纳米片束的结构和电子修饰。为了获得纳米片束的定制特性和功能，层状晶体的结构修饰是一种有用的技术。
Creating vertically aligned 2D nanostructures is a promising approach to achieving advanced electronic and optoelectronic materials. In this study, Mg2Si nanosheet bundles were synthesized by Ca atom extraction from CaSi2 microwalls grown on Si substrates via thermal annealing in a MgCl2/Mg mixed vapor. The nanosheet bundle structure was modified to compound nanosheet bundles from previously reported Si nanosheet bundles. The observed Mg2Si nanosheets consist of thin Mg2Si layers, and well-defined fine-scale Mg2Si superlattice-like structures were achieved in the nanosheet bundles. In addition, the Raman scattering and photoluminescence properties were examined, and structural and electronic modifications of the nanosheet bundle compared with the bulk crystals were suggested. To obtain tailored properties and functionalities of the nanosheet bundles, structural modification of layered crystals is a useful technique.