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Dilena, Enrico [VerfasserIn]; Dorfs, Dirk [VerfasserIn]; George, Chandramohan [VerfasserIn]; Miszta, Karol [VerfasserIn]; Povia, Mauro [VerfasserIn]; Genovese, Alessandro [VerfasserIn]; Casu, Alberto [VerfasserIn]; Prato, Mirko [VerfasserIn]; Manna, Liberato [VerfasserIn]

Colloidal Cu 2-x(S ySe 1-y) alloy nanocrystals with controllable crystal phase: Synthesis, plasmonic properties, cation exchange and electrochemical lithiation - [published Version]

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  • Medientyp: E-Artikel; Sonstige Veröffentlichung
  • Titel: Colloidal Cu 2-x(S ySe 1-y) alloy nanocrystals with controllable crystal phase: Synthesis, plasmonic properties, cation exchange and electrochemical lithiation
  • Beteiligte: Dilena, Enrico [VerfasserIn]; Dorfs, Dirk [VerfasserIn]; George, Chandramohan [VerfasserIn]; Miszta, Karol [VerfasserIn]; Povia, Mauro [VerfasserIn]; Genovese, Alessandro [VerfasserIn]; Casu, Alberto [VerfasserIn]; Prato, Mirko [VerfasserIn]; Manna, Liberato [VerfasserIn]
  • Erschienen: Cambridge : Royal Society of Chemistry, 2012
  • Erschienen in: Journal of Materials Chemistry 22 (2012), Nr. 26
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/2161; https://doi.org/10.1039/c2jm30788j
  • ISSN: 0959-9428
  • Schlagwörter: Cadmium compounds ; Phase change memory ; Cadmium alloys ; Hexagonal phase ; Electrochemical lithiation ; Plasmonic properties ; Synthesis (chemical) ; Stoichiometry ; Positive ions ; Synthetic routes ; Nanocrystalline alloys ; Nanocrystals ; Anode material ; Li-ion batteries ; Cation exchanges ; Crystal phase ; Hexagonal nanocrystals ; Spectral position ; Near Infrared ; Plasmon resonances ; Anodes ; Lithiation
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  • Beschreibung: We report synthetic routes to both cubic and hexagonal phase Cu 2-x(S ySe 1-y) alloy nanocrystals exhibiting a well-defined near-infrared valence band plasmon resonance, the spectral position of which is dependent mainly on x, i.e. on Cu stoichiometry, and to a lesser extent on the crystal phase of the NCs. For cubic Cu 2-x(S ySe 1-y) nanocrystals y could be varied in the 0.4-0.6 range, while for hexagonal nanocrystals y could be varied in the 0.3-0.7 range. Furthermore, the Cu 2-x(S ySe 1-y) nanocrystals could be transformed into the corresponding Cd-based alloy nanocrystals with comparable S ySe 1-y stoichiometry, by cation exchange. The crystal phase of the resulting Cd(S ySe 1-y) nanocrystals was either cubic or hexagonal, depending on the phase of the starting nanocrystals. One sample of cubic Cu 2-x(S ySe 1-y) nanocrystals, with S 0.5Se 0.5 chalcogenide stoichiometry, was then evaluated as the anode material in Li-ion batteries. The nanocrystals were capable of undergoing lithiation/delithiation via a displacement/conversion reaction (Cu to Li and vice versa) in a partially reversible manner. © 2012 The Royal Society of Chemistry.
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