Digestive ripening in the formation of monodisperse silver nanospheres
| Autor: | Yadong Yin, Chuanbo Gao, Shumeng Zhang, Moxuan Liu, Kai Liu, Lei Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Diethylamine
Materials science Dispersity food and beverages Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences Suspension (chemistry) chemistry.chemical_compound symbols.namesake Chemical engineering Digestive ripening chemistry Etching (microfabrication) Materials Chemistry medicine symbols General Materials Science 0210 nano-technology Raman scattering medicine.drug |
| Zdroj: | Materials Chemistry Frontiers. 2:1328-1333 |
| ISSN: | 2052-1537 |
| DOI: | 10.1039/c8qm00077h |
| Popis: | Digestive ripening is a unique process in colloidal synthesis that can enable direct conversion of polydisperse nanoparticles into monodisperse ones. However, such a strategy usually relies on strongly coordinating ligands such as alkylthiols to initiate etching and stabilize the surfaces and thus affords nanoparticles with hydrophobic and passivated surfaces, which greatly limits their applications. In this work, we report that digestive ripening can be achieved by decoupling the etching and surface stabilization functions using two independent chemical agents, allowing the use of considerably weak capping ligands which are hydrophilic and can be replaced later according to the need of the specific applications. As a proof-of-concept, we, for the first time, demonstrate a novel digestive ripening system to synthesize hydrophilic monodisperse Ag nanospheres capped by conveniently removable ligands. With chloride for oxidative etching and diethylamine for effective surface capping, monodisperse Ag nanospheres have been conveniently obtained by starting with a precursor of either a Ag+ solution or a AgCl suspension. These monodisperse Ag nanospheres with a clean surface exhibit excellent activity in surface-enhanced Raman scattering (SERS). We believe that this new strategy may significantly broaden the general applicability of digestive ripening for the controlled synthesis of colloidal nanoparticles for a broad range of applications. |
| Databáze: | OpenAIRE |
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