Oil-soluble CuInS2/ZnS Quantum Dots
Alfa Chemistry offers CuInS2/ZnS core/shell quantum dots in the emission range of 460 nm to 725 nm. Alfa Chemistry offers quantum dots with strong lattice strength and stable performance. The internal pressure caused by the lattice defects of the quantum dots is effectively reduced, so the quantum dots have high luminescence efficiency and stability. Our CuInS2/ZnS quantum dots can be used for high sensitivity cell imaging, photovoltaic devices, solar cells and light emitting devices.
Environmentally friendly CuInS2/ZnS core-shell QDs were prepared by solvothermal method by Jindal et al. CuInS2/ZnS QDs were applied to in vitro heterojunction devices, and active hybrid layers consisting of P3HT and CuInS2/ZnS QDs were investigated. The energy level information of CuInS2/ZnS QDs as electron acceptors was explored by UV photoelectron spectroscopy. The in vitro heterojunction hybrid devices of ITO/PEDOT:PSS/P3HT: (CuInS2/ZnS QDs)/ZnO/Ag were designed by spin-coating method, and their electrical characteristics were investigated by a solar simulator. The current density-voltage characteristics show that the power conversion efficiency increases as the concentration of CuInS2/ZnS QDs in the in vitro heterojunction devices increases.
Fig. 1 Schematic representation of solar cell device. (Jindal et al., 2018)
Dong et al. explored the effect of thiol-capped CuInS2@ZnS nanocrystals (CuInS2@ZnS-Thiol) on the ECL trigger potential of CuInS2@ZnS-Thiol/N2H4-H2O at Au working electrode. The glutathione (GSH) capping agent not only gives CuInS2@ZnS-Thiol/N2H4-H2O a stronger redox ECL than other thiol capping agents, but also results in the largest change in the ECL trigger potential of CuInS2@ZnS-Thiol/N2H4-H2O when the luminol changes from the monodisperse state to the surface-confined state. CuInS2@ZnS-GSH/N2H4-H2O system's ECL in the monodisperse and surface-confined states are spectrally identical, indicating that this surface-confinement strategy has a negligible effect on the excited state of the ECL of CuInS2@ZnS-GSH. A surface-confined ECL sensor of about 0.32 V was fabricated using CuInS2@ZnS-GSH as the luminol, which can selectively determine K-RAS genes from 1 to 500 pM with a detection limit of 0.5 pmol L-1 (S/N=3).
Fig. 2 Schematic Illustration of the Procedure for Determining the K-RAS Gene with CuInS2@ZnS-GSH NCs as ECL Tags. (Dong et al., 2021)
Mechanochemically synthesized CuInS2 and CuInS2/ZnS samples were covered with chitosan by wet stirred media grinding to obtain nanosuspensions suitable for testing their bioimaging properties.The stability of the prepared nanosuspensions was studied by E Dutková et al. using particle size distribution and zeta potential measurements and the results were compared. The CuInS2/ZnS nanosuspensions were stable for only 1 week, on the other hand, CuInS2 was stable for 37 weeks. Potential bioimaging applications were validated in vitro on four cancer cell lines, where CuInS2 samples had no toxicity risk.
Fig. 3 SEM micrographs of the chitosan capped CuInS2 (a) and CuInS2/ZnS (b). (E Dutková et al., 2020)
Alfa Chemistry can provide a variety of complex and customized core-shell fluorescent quantum dot products. Our products involve a variety of fluorescent quantum dot products. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.
- Jindal, S. , and S. M. Giripunje. Potential effect of CuInS2 /ZnS core-shell quantum dots on P3HT/PEDOT:PSS heterostructure based solar cell[J]. Optics & Laser Technology, 2018, 103:212-218.
- Dong S., et al. Low-Triggering-Potential Electrochemiluminescence from Surface-Confined CuInS2@ ZnS Nanocrystals and their Biosensing Applications[J]. Analytical Chemistry, 2021, 93(36): 12250-12256.
- E Dutková, et al. Chitosan capped CuInS2 and CuInS2 /ZnS by wet stirred media milling: in vitro verification of their potential bio-imaging applications[J]. Applied Nanoscience, 2020, 10(12):4661-4671.
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