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Structural and chemical characterization of MoO 2 /MoS 2 triple-hybrid materials using electron microscopy in up to three dimensions

  • This work presents the synthesis of MoO2/MoS2 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 via energy dispersive X-ray and electron energy loss spectroscopy, gave proof of a MoO2 core covered by few layers of a MoS2 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 Z-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, i.e. for faradaic charge storage or electrocatalysis.

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Metadaten
Document Type:Article
Author:Anna Frank, Thomas Gänsler, Stefan Hieke, Simon FleischmannORCiD, Samantha HusmannORCiD, Volker PresserORCiD, Christina Scheu
URN:urn:nbn:de:bsz:291:415-3447
DOI:https://doi.org/10.1039/D0NA00806K
Parent Title (English):Nanoscale Advances
Volume:3
Issue:4
First Page:1067
Last Page:1076
Publisher:RSC
Language:English
Year of first Publication:2021
Release Date:2022/11/18
Impact:05.598 (2021)
Funding Information:Leibniz-Gemeinschaft (SAW-2017)
Scientific Units:Energy Materials
Open Access:Open Access
Signature:INM 2021/024
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International