Formation of pseudomorphic nanocages from Cu2O nanocrystals through anion exchange reactions
نویسندگان
چکیده
منابع مشابه
Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions
We demonstrate that, via controlled anion exchange reactions using a range of different halide precursors, we can finely tune the chemical composition and the optical properties of presynthesized colloidal cesium lead halide perovskite nanocrystals (NCs), from green emitting CsPbBr3 to bright emitters in any other region of the visible spectrum, and back, by displacement of Cl(-) or I(-) ions a...
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Films of colloidal CsPbX3 (X = I, Br or Cl) nanocrystals, prepared by solution drop-casting or spin-coating on a silicon substrate, were exposed to a low flux of X-rays from an X-ray photoelectron spectrometer source, causing intermolecular C═C bonding of the organic ligands that coat the surface of the nanocrystals. This transformation of the ligand shell resulted in a greater stability of the...
متن کاملSynthesis of Composition Tunable and Highly Luminescent Cesium Lead Halide Nanowires through Anion-Exchange Reactions.
Here, we demonstrate the successful synthesis of brightly emitting colloidal cesium lead halide (CsPbX3, X = Cl, Br, I) nanowires (NWs) with uniform diameters and tunable compositions. By using highly monodisperse CsPbBr3 NWs as templates, the NW composition can be independently controlled through anion-exchange reactions. CsPbX3 alloy NWs with a wide range of alloy compositions can be achieved...
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We have investigated cation exchange reactions in copper selenide nanocrystals using two different divalent ions as guest cations (Zn(2+) and Cd(2+)) and comparing the reactivity of close to stoichiometric (that is, Cu2Se) nanocrystals with that of nonstoichiometric (Cu(2-x)Se) nanocrystals, to gain insights into the mechanism of cation exchange at the nanoscale. We have found that the presence...
متن کاملAtomic and Electronic Structure of γFe2O3/Cu2O Heterostructured Nanocrystals
1. Materials Science & Technology Division, Oak Ridge National Laboratory. Oak Ridge, TN, USA. 2. Department of Physics & Astronomy, Vanderbilt University. Nashville, TN, USA. 3. Department of Chemistry, University of Toronto. Toronto, Canada. 4. Departamento de Fisica Aplicada III, Universidad Complutense de Madrid. Madrid, Spain. 5. Department of Materials Science and Engineering, University ...
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ژورنال
عنوان ژورنال: Science
سال: 2016
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aad5520