A modular design approach to polymer-coated ZnO nanocrystals

Chwojnowska, Elżbieta; Grzonka, J.; Justyniak, Iwona; Ratajczyk, Tomasz; Lewiński, Janusz

doi:10.1016/j.isci.2022.105759

Cited by 2 publications

(2 citation statements)

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“…Hence, the possible implications for future applications of sol-gel derived materials are extensive as it is well established that the physicochemical properties of ZnO NCs are strongly affected by the presence of intrinsic point defects or impurities, such as discovered lithium cations incorporated in the lattice or as surface defects. In turn, new opportunities regarding the preparation of high-quality and alkali metal contaminations-free ZnO NCs have provided wet-organometallic approaches, [9,11,27,31,[61][62][63][64] and further works on the preparation of intentionally Li-doped ZnO quantum dots from well-defined organometallic precursors are in progress.…”

Section: Discussionmentioning

confidence: 99%

On the Fate of Lithium Ions in Sol–Gel Derived Zinc Oxide Nanocrystals

Olejnik‐Fehér,

Jędrzejewska,

Wolska‐Pietkiewicz

et al. 2024

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Among diverse chemical synthetic approaches to zinc oxide nanocrystals (ZnO NCs), ubiquitous inorganic sol–gel methodology proved crucial for advancements in ZnO‐based nanoscience. Strikingly, unlike the exquisite level of control over morphology and size dispersity achieved in ZnO NC syntheses, the purity of the crystalline phase, as well as the understanding of the surface structure and the character of the inorganic–organic interface, have been limited to vague descriptors until very recently. Herein, ZnO NCs applying the standard sol–gel synthetic protocol are synthesized with zinc acetate and lithium hydroxide and tracked the integration of lithium (Li) cations into the interior and exterior of nanoparticles by combining various techniques, including advanced solid‐state NMR methods. In contrast to common views, it is demonstrated that Li+ ions remain kinetically trapped in the inorganic core, enter into a shallow subsurface layer, and generate “swelling” of the surface and interface regions. Thus, this work enabled both the determination of the NCs’ structural imperfections and an in‐depth understanding of the unappreciated role of the Li+ ions in impacting the doping and the passivation of sol–gel‐derived ZnO nanomaterials.

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Section: Discussionmentioning

confidence: 99%

On the Fate of Lithium Ions in Sol–Gel Derived Zinc Oxide Nanocrystals

Olejnik‐Fehér,

Jędrzejewska,

Wolska‐Pietkiewicz

et al. 2024

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“…Nowadays, new possibilities have been provided by the development of wet-organometallic approaches, employing homo- [19][20][21] or heteroleptic 11,13,[22][23][24][25][26][27][28][29][30][31] zinc alkyl precursors, affording high-quality monodisperse, quantum-sized ZnO nanocrystals. For instance, Kahn and Chaudret have developed a room-temperature organometallic one-pot preparation of hydrophobic ZnO QDs through the hydrolysis of a dicyclohexyl zinc precursor in the presence of long-chain amines (often applied in great excess) as L-type stabilizing ligands (Scheme 1b).…”

Section: Introductionmentioning

confidence: 99%