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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rogach, Andrey
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Red-Emitting CsPbI3 /ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stabilitycitations
- 2024Near-infrared two-photon excited photoluminescence from Yb3+-doped CsPbClxBr3−x perovskite nanocrystals embedded into amphiphilic silica microspherescitations
- 2024Micrometer-Resolution Fluorescence and Lifetime Mappings of CsPbBr 3 Nanocrystal Films Coupled with a TiO 2 Grating
- 2023Exploring CsPbX<sub>3</sub> (X = Cl, Br, I) Perovskite Nanocrystals in Amorphous Oxide Glasses: Innovations in Fabrication and Applicationscitations
- 2021Composite Nanospheres Comprising Luminescent Carbon Dots Incorporated into a Polyhedral Oligomeric Silsesquioxane Matrixcitations
- 2021Room temperature fabrication of stable, strongly luminescent Dion–Jacobson tin bromide perovskite microcrystals achieved through use of primary alcoholscitations
- 2021Carbon Nanoparticles as Versatile Auxiliary Components of Perovskite-Based Optoelectronic Devicescitations
- 2020Tunable Mie Resonances of Tin-based Iodide Perovskite Islandlike Films with Enhanced Infrared Photoluminescencecitations
- 2020Influence of the solvent environment on luminescent centers within carbon dotscitations
- 2020Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glasscitations
- 2020Stable Luminescent Composite Microspheres Based on Porous Silica with Embedded CsPbBr3 Perovskite Nanocrystalscitations
- 2019Synthesis and energy structure of optical transitions of the nitrogen and sulfur co-doped carbon dots
- 2019Using Polar Alcohols for the Direct Synthesis of Cesium Lead Halide Perovskite Nanorods with Anisotropic Emissioncitations
- 2018Influence of molecular fluorophores on the research field of chemically synthesized carbon dotscitations
- 2016Photo-Aligned Quantum Rod Dispersed Liquid Crystal Polymer Filmscitations
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article
Composite Nanospheres Comprising Luminescent Carbon Dots Incorporated into a Polyhedral Oligomeric Silsesquioxane Matrix
Abstract
We produced composite nanospheres, which consist of nanometer-sized luminescent carbon dots (CDs) incorporated in a dielectric matrix of polyhedral oligomeric silsesquioxane (POSS). The POSS-CD composite structure is built from N-doped sp<sup>2</sup>-hybridized carbon domains formed by solvothermal treatment in inverse micelles of citric acid surrounded by POSS molecules. The size of the nanospheres can be tuned by varying the ratio between the precursors (citric acid and POSS) over the range of 20-60 nm; they emit in the blue region at 460-480 nm with a high photoluminescence quantum yield (PL QY) of up to 50%. Furthermore, the POSS-CD nanospheres which are initially soluble in nonpolar solvents can be easily transferred into a broad range of polar and/or aprotic solvents (such as water, methanol, ethanol, dimethylsulfoxide, dimethylformamide, ethylene glycol, <i>etc</i>.) by partial chemical etching of the POSS matrix with tetramethylammonium hydroxide. At the final stage of the etching procedure, the initial large (several tens of nanometers) composite nanospheres transform into small (similar to 5 nm) carbon nanoparticles resembling "classical" chemically synthesized CDs, which further confirms their "raisin bun"-like architecture. Little alteration of the emission peak position and shape occurs upon this transformation, while the PL QY remains high (15-40%), which also confirms that the carbon domains inside the POSS matrix dominate the optical transitions and the luminescence of the POSS-CD nanospheres.