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Verfasst von:Synnatschke, Kevin [VerfasserIn]   i
 Hofstetter, Yvonne J. [VerfasserIn]   i
 Grieger, Sebastian [VerfasserIn]   i
 Vaynzof, Yana [VerfasserIn]   i
 Backes, Claudia [VerfasserIn]   i
Titel:Liquid exfoliation of Ni2P2S6
Titelzusatz:structural characterization, size-dependent properties, and degradation
Verf.angabe:Kevin Synnatschke, Shouqi Shao, Jonas van Dinter, Yvonne J. Hofstetter, Daniel James Kelly, Sebastian Grieger, Sarah J. Haigh, Yana Vaynzof, Wolfgang Bensch, and Claudia Backes
E-Jahr:2019
Jahr:October 15, 2019
Umfang:13 S.
Fussnoten:Gesehen am 30.01.2020 ; Im Text sind die Zahlen 2 und 6 tiefgestellt
Titel Quelle:Enthalten in: Chemistry of materials
Ort Quelle:Washington, DC : American Chemical Society, 1989
Jahr Quelle:2019
Band/Heft Quelle:31(2019), 21, Seite 9127-9139
ISSN Quelle:1520-5002
Abstract:Reducing the size of a material, from a bulk solid to a nanomaterial, may lead to drastic changes of various properties including reactivity and optical properties. Chemical reactivity is often increased due to the nanomaterial’s higher effective surface area, while confinement and geometric effects lead to systematic changes in optical properties. Here, we investigate the size-dependent properties of Ni2P2S6 nanosheets that were obtained from liquid phase exfoliation in N-cyclohexyl-2-pyrrolidone. The as-obtained stock dispersion was size-selected by liquid cascade centrifugation resulting in fractions with distinct size and thickness distributions, as quantified by statistical atomic force microscopy. Raman, TEM, XRD, and XPS characterization revealed that the exfoliated flakes have good crystallinity and high structural integrity across all sizes. The optical extinction and absorbance spectra systematically change with the lateral dimensions and layer number, respectively. Linking these changes to nanosheet dimensions allows us to establish quantitative metrics for size and thickness from optical properties. To gain insights into the environmental stability, extinction/absorbance behavior was followed as a function of time at different storage temperatures. Degradation is observed following first-order kinetics, and activation energies were extracted from the temperature dependent data. The decomposition is due to oxidation which appears to occur both at edges and on the basal plane.
DOI:doi:10.1021/acs.chemmater.9b03468
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1021/acs.chemmater.9b03468
 DOI: https://doi.org/10.1021/acs.chemmater.9b03468
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1688908242
Verknüpfungen:→ Zeitschrift

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