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.

创建垂直对齐的2D纳米结构是实现先进的电子和光电材料的一种有前途的方法。在这项研究中，Mg ₂ Si纳米片束是通过在MgCl ₂ / Mg混合蒸气中通过热退火从在Si衬底上生长的CaSi ₂微壁中通过Ca原子萃取合成的。纳米片束结构被修改为由先前报道的Si纳米片束复合而成的纳米片束。观察到的Mg ₂ Si纳米片由薄的Mg ₂ Si层和定义明确的精细Mg _2组成在纳米片束中实现了Si超晶格状结构。另外，检查了拉曼散射和光致发光性质，并提出了与体晶体相比的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，层状晶体的结构改性是有用的技术。