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Impact of synthesis conditions on the morphology and crystal structure of tungsten nitride nanomaterials

Wenzel, Olivia 1; Rein, Viktor 2; Hugenschmidt, Milena ORCID iD icon 1; Schilling, Frank 3; Feldmann, Claus 2; Gerthsen, Dagmar 1
1 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)
2 Institut für Anorganische Chemie (AOC), Karlsruher Institut für Technologie (KIT)
3 Institut für Angewandte Geowissenschaften (AGW), Karlsruher Institut für Technologie (KIT)

Abstract:

Nanocrystalline tungsten nitride (WN$_{x}$) aggregates and nanosheets are synthesized with a new alkylamine-based synthesis strategy for potential applications in nanoelectronics and catalysis. These applications preferentially require crystalline materials with controlled morphology, which has been rarely demonstrated for WN$_{x}$ nanomaterials in the past. In the synthesis approach presented in this work, the morphology of nanoscale WN$_{x}$ is controlled by long-chained amines that form lyotropic or lamellar phases depending on the surfactant concentration. The structural and chemical properties of the WN$_{x}$ nanomaterials are studied in detail using different electron microscopic techniques in combination with electron spectroscopic analyses. Material synthesis and sample preparation for transmission electron microscopy (TEM) were performed in an argon atmosphere (Schlenk line and glovebox). The samples were inserted into the electron microscope via an air-tight TEM transfer holder to protect the material from hydrolysis and oxidation. From the lyotropic phase nanocrystalline WN$_{x}$ aggregates were obtained, which consist of 2.4 ± 0.8 nm small crystallites of the cubic WN$_{x}$ phase with a composition of WN$_{0.7}$. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000137748
Veröffentlicht am 23.09.2021
Originalveröffentlichung
DOI: 10.1039/d1ra04448f
Scopus
Zitationen: 2
Web of Science
Zitationen: 1
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT 3D Matter Made to Order (3DMM2O)
Institut für Angewandte Geowissenschaften (AGW)
Institut für Anorganische Chemie (AOC)
Laboratorium für Elektronenmikroskopie (LEM)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000137748
Erschienen in RSC Advances
Verlag Royal Society of Chemistry (RSC)
Band 11
Heft 45
Seiten 28198-28210
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Dimensions
Web of Science
Scopus
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