Frank Anna, Gänsler Thomas, Hieke Stefan, Fleischmann Simon, Husmann Samantha, Presser Volker, Scheu Christina
Max-Planck-Institut für Eisenforschung GmbH, Independent Research Group Nanoanalytics and Interfaces Düsseldorf Germany
INM - Leibniz Institute for New Materials Saarbrücken Germany.
Nanoscale Adv. 2020 Dec 29;3(4):1067-1076. doi: 10.1039/d0na00806k. eCollection 2021 Feb 23.
This work presents the synthesis of MoO/MoS core/shell nanoparticles within a carbon nanotube network and their detailed electron microscopy investigation in up to three dimensions. The triple-hybrid core/shell material was prepared by atomic layer deposition of molybdenum oxide onto carbon nanotube networks, followed by annealing in a sulfur-containing gas atmosphere. High-resolution transmission electron microscopy together with electron diffraction, supported by chemical analysis energy dispersive X-ray and electron energy loss spectroscopy, gave proof of a MoO core covered by few layers of a MoS shell within an entangled network of carbon nanotubes. To gain further insights into this complex material, the analysis was completed with 3D electron tomography. By using -contrast imaging, distinct reconstruction of core and shell material was possible, enabling the analysis of the 3D structure of the material. These investigations showed imperfections in the nanoparticles which can impact material performance, for faradaic charge storage or electrocatalysis.
这项工作展示了在碳纳米管网络中合成MoO/MoS核壳纳米颗粒及其在高达三维的详细电子显微镜研究。通过在碳纳米管网络上进行氧化钼的原子层沉积，然后在含硫气体气氛中退火，制备了这种三杂化核壳材料。高分辨率透射电子显微镜结合电子衍射，并辅以能量色散X射线化学分析和电子能量损失谱，证明了在缠结的碳纳米管网络中，MoO核被几层MoS壳覆盖。为了进一步深入了解这种复杂材料，通过三维电子断层扫描完成了分析。通过使用对比度成像，可以对核材料和壳材料进行清晰的重建，从而能够分析材料的三维结构。这些研究表明，纳米颗粒中的缺陷可能会影响材料性能，如用于法拉第电荷存储或电催化。
