In situ NMR reveals real-time nanocrystal growth evolution via monomer-attachment or particle-coalescence
| Autor: | Liat Avram, Anna Lavie, Vaishali Arunachalam, Olga Brontvein, Reut Mashiach, Michal Leskes, Lothar Houben, Boris Rybtchinski, Haim Weissman, Amnon Bar-Shir |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
In situ
Materials science Fabrication Science General Physics and Astronomy Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Nanomaterials chemistry.chemical_compound NMR spectroscopy Coalescence (physics) Multidisciplinary Nanoscale materials Ligand technology industry and agriculture General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Monomer chemistry Nanocrystal Particle Nanoparticles Materials chemistry 0210 nano-technology |
| Zdroj: | Nature Communications Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021) |
| ISSN: | 2041-1723 |
| Popis: | Understanding inorganic nanocrystal (NC) growth dynamic pathways under their native fabrication environment remains a central goal of science, as it is crucial for rationalizing novel nanoformulations with desired architectures and functionalities. We here present an in-situ method for quantifying, in real time, NCs’ size evolution at sub-nm resolution, their concentration, and reactants consumption rate for studying NC growth mechanisms. Analyzing sequential high-resolution liquid-state 19F-NMR spectra obtained in-situ and validating by ex-situ cryoTEM, we explore the growth evolution of fluoride-based NCs (CaF2 and SrF2) in water, without disturbing the synthesis conditions. We find that the same nanomaterial (CaF2) can grow by either a particle-coalescence or classical-growth mechanism, as regulated by the capping ligand, resulting in different crystallographic properties and functional features of the fabricated NC. The ability to reveal, in real time, mechanistic pathways at which NCs grow open unique opportunities for tunning the properties of functional materials. Understanding nanocrystal growth pathways under their native fabrication environment remains a central goal of science. By synthesizing nanofluorides under in-situ NMR conditions, the authors are able to probe their sub-nm growth evolution, elucidating their formation by coalescence or monomer-attachment. |
| Databáze: | OpenAIRE |
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