Synthesis and Characterization of Ultrathin Silver Sulfide Nanoplatelets
| Autor: | Subash Kattel, Bruce A. Parkinson, Joshua T. Stecher, Laurie A. King, Meghan E. Kern, Lenore Kubie, Joseph Murphy, William Rice, Qian Yang |
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| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Materials science Exciton Silver sulfide Analytical chemistry General Physics and Astronomy Quantum yield Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Microscopy Electron Transmission X-Ray Diffraction General Materials Science Colloids Spectroscopy Absorption (electromagnetic radiation) Photocurrent General Engineering Silver Compounds 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Transmission electron microscopy Nanoparticles 0210 nano-technology |
| Zdroj: | ACS Nano. 11:8471-8477 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.7b04280 |
| Popis: | © 2017 American Chemical Society. We report the synthesis of ultrathin silver sulfide (Ag2S) nanoplatelets (NPLs) synthesized via a one-pot method in ethylene glycol with 3-mercaptopropionic acid serving as both the sulfur precursor and the platelet ligand. The colloidally synthesized nanoplatelets are exceptionally thin, with a thickness of only 3.5 ± 0.2 Å and a 1S exciton Bohr diameter to confinement ratio of ∼12.6. The NPL growth is shown to be quantized by layer thickness using absorption and photoluminescence (PL) spectroscopy. Transmission electron microscopy, atomic force microscopy, and X-ray diffraction analyses of the NPLs show that they correspond to the (202) plane of the β-Ag2S structure. The PL quantum yield of these NPLs is ∼30%, suggesting their potential use in biomedical imaging. Optoelectronic properties were evaluated via sensitized photocurrent spectroscopy with the resulting spectra closely matching the distinctive absorption spectral shape of the Ag2S NPLs. |
| Databáze: | OpenAIRE |
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