Vol 9: Large-scale synthesis of highly emissive and photostable CuInS2-ZnS nanocrystals through hybrid flow reactor.Report as inadecuate



 Vol 9: Large-scale synthesis of highly emissive and photostable CuInS2-ZnS nanocrystals through hybrid flow reactor.


Vol 9: Large-scale synthesis of highly emissive and photostable CuInS2-ZnS nanocrystals through hybrid flow reactor. - Download this document for free, or read online. Document in PDF available to download.

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This article is from Nanoscale Research Letters, volume 9.AbstractWe report a high-yield, low-cost synthesis route to colloidal CuInS2-ZnS CIS-ZnS nanocrystals NCs with Cu vacancies in the crystal lattice. Yellow-emitting CIS-ZnS core-shell NCs of high luminescence were facilely synthesized via a stepwise, consecutive hybrid flow reactor approach. It is based on serial combination of a batch-type mixer and a flow-type furnace. In this reactor, the flow rate of the solutions was typically 1 mL-min, 100 times larger than that of conventional microfluidic reactors. This method can produce gram quantities of material with a chemical yield in excess of 90% with minimal solvent waste. This is a noninjection-based approach in 1-dodecanethiol DDT with excellent synthetic reproducibility and large-scale capability. The optical features and structure of the obtained CIS-ZnS NCs have been characterized by UV–vis and fluorescence spectroscopies, X-ray diffraction XRD, X-ray photoelectron spectroscopy XPS, energy-dispersive X-ray spectroscopy EDX and high-resolution transmission electron microscopy HRTEM. The resulting CIS-ZnS NCs in chloroform exhibit quantum yield QY of 61.4% with photoemission peaking at 561 nm and full width at half maximum FWHM of 92 nm. The as-synthesized CIS-ZnS NCs were proven to have excellent photostability. The synthesized CIS-ZnS NCs can be a promising fluorescent probe for biological imaging and color converting material for light-emitting diode due to Cd-free constituents.



Author: Lee, Jun; Han, Chang-Soo

Source: https://archive.org/







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