The HelixJet atmospheric plasma-assisted synthesis can be a new toolbox to realize dedicated nanoparticle architectures such as Janus-type morphologies. Silicon nanoparticles produced by the decomposition of Silane molecules are directed into an in-flight annealing stage. The applied high-temperature supplies a metal vapor rich atmosphere containing Manganese, Chromium, Iron, and Tin outgassing from the used steel tube. The metal atoms alloy into the Silicon nanoparticles and form a self-assembled 'Si/Mn_xSi_y-alloy' Janus nanosphere architecture. The Janus particles nanochemistry is thoroughly examined in detail by the analytic capabilities of transmission electron microscopy. The combined approach of electron diffraction, EDS, and EELS identifies the Janus particle composition consisting of a pure Si hemisphere interfaced to an alloyed Mn₄Si₇ hemisphere covered by a thin (Mn_aFe_bCr_c)Si_y surface shell.

中文翻译：

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使用 HelixJet 大气等离子体源生产的自组装“Si/Mn4Si7 合金”Janus 纳米球结构的透射电子显微镜研究

HelixJet 大气等离子体辅助合成可以成为实现专用纳米粒子结构（例如 Janus 型形态）的新工具箱。由硅烷分子分解产生的硅纳米颗粒被引导至飞行中退火阶段。所施加的高温提供了富含金属蒸气的气氛，其中含有从用过的钢管中逸出的锰、铬、铁和锡。金属原子与硅纳米颗粒合金化，形成自组装的“Si/Mn _x Si _y合金”Janus 纳米球结构。通过透射电子显微镜的分析能力，对 Janus 粒子的纳米化学进行了彻底的详细检查。电子衍射、EDS 和 EELS 的组合方法确定了 Janus 颗粒成分，该成分由纯 Si 半球与合金 Mn 4 Si 7 半球界面组成，合金 Mn _{4 Si 7}半球覆盖有薄 (Mn _a Fe _b Cr _c )Si _y表面壳。