Facile, Economic and Size-Tunable Synthesis of Metal Arsenide Nanocrystals
| Autor: | Eric M. Janke, Benjamin T. Diroll, Richard D. Schaller, Vishwas Srivastava, Dmitri V. Talapin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
General Chemical Engineering Reactive intermediate chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nanomaterials Arsenide Metal Colloid chemistry.chemical_compound chemistry Nanocrystal visual_art Materials Chemistry visual_art.visual_art_medium 0210 nano-technology Absorption (electromagnetic radiation) Arsenic |
| Zdroj: | Chemistry of Materials. 28:6797-6802 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.6b03501 |
| Popis: | Synthesis of colloidal nanocrystals (NC) of important arsenide nanomaterials (e.g., InAs, Cd3As2) has been limited by the lack of convenient arsenic precursors. Here we address this constraint by identifying a convenient and commercially available As precursor, tris-dimethylaminoarsine (As(NMe2)3), which can be used to prepare high quality InAs NCs with controlled size distributions. Our approach employs a reaction between InCl3 and As(NMe2)3 using diisobutylaluminum hydride (DIBAL-H) to convert As(NMe2)3 in situ into reactive intermediates AsHx(NMe2)3–x, where x = 1,2,3. NC size can be varied by changing DIBAL-H concentration and growth temperature, with colloidal solutions of InAs showing size dependent absorption and emission features tunable across wavelengths of 750 to 1450 nm. We also show that this approach works well for the colloidal synthesis of Cd3As2 NCs. By circumventing the preparation of notoriously unstable and dangerous arsenic precursors (e.g., AsH3 and As(SiMe3)3), this work improves th... |
| Databáze: | OpenAIRE |
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