The unique optical properties of zinc oxide nanocrystals (ZnO NCs) are strongly dependent on both the properties and the composition of the inorganic core-organic ligand interface. Developing a novel organometallic self-supporting approach, we report on the synthesis and characterization of ZnO nanocrystals coated by chiral monoanionic aminoalcoholate ligands. The resulting ZnO NCs are both chiroptically active and possess size dependent optical properties. The size and in consequence the emission color of the ZnO NCs could be simply adjusted by the characteristic of the aminoalcohol used.
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http://dx.doi.org/10.1039/c7nr02843a | DOI Listing |
Med J Malaysia
January 2025
Department of Mechanical engineering, IIT Madras.
Introduction: Green tea is a medicinal beverage extracted from the plant Camellia sinensis. Antioxidants that exist naturally can be extracted as pure compounds from their parent materials for nutraceutical and medicinal applications. The present study aims to assess the antioxidant activity of Zinc oxide-titanium dioxide nano-composites (ZnO-TiO2 NCs) containing green tea extract.
View Article and Find Full Text PDFMar Drugs
December 2024
Interdepartmental Centre of Environmental Science and Engineering (CINSA), University of Cagliari, Via San Giorgio 12, 09124 Cagliari, Italy.
The green synthesis of silver (Ag) and zinc oxide (ZnO) nanoparticles (NPs), as well as Ag/AgO/ZnO nanocomposites (NCs), using polar and apolar extracts of , offers a sustainable method for producing nanomaterials with tunable properties. The impact of the synthesis environment and the nanomaterials' characteristics on cytotoxicity was evaluated by examining reactive species production and their effects on mitochondrial bioenergetic functions. Cytotoxicity assays on PC12 cells, a cell line originated from a rat pheochromocytoma, an adrenal medulla tumor, demonstrated that Ag/AgO NPs synthesized with apolar (Ag/AgO NPs A) and polar (Ag/AgO NPs P) extracts exhibited significant cytotoxic effects, primarily driven by Ag ion release and the disruption of mitochondrial function.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
November 2024
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430200, People's Republic of China.
Herein, we report an unconventional heterobidentate coordination mode of conventional 4-hydroxypyridine ligand in a novel compound Zn(CHNO). The strong heterobidentate coordination interactions between Zn and 4-hydroxypyridine ligands promote a uniform alignment of the polarization of each [ZnON] tetrahedral building unit, resulting in remarkably strong second-harmonic generation (SHG) with an intensity that is the largest among all UV-transparent Zn-containing metal-organic compounds reaching 13.6×KDP.
View Article and Find Full Text PDFMicrosc Res Tech
November 2024
Department of Chemistry, Turabah University College, Taif University, Taif, Saudi Arabia.
The goal of the present work is to create ZnO/NiO nanocomposites (NCs) for the photocatalytic destruction of organic contaminants using the co-precipitation technique. To investigate physiochemical characteristics, FT-IR, UV visible spectroscopy, SEM, and XRD were used. The ZnO hexagonal phase and the NiO cubic phase in the ZnO/NiO NCs were verified by the diffraction pattern.
View Article and Find Full Text PDFACS Appl Mater Interfaces
November 2024
Hasselt University, Institute for Materials Research (imo-imomec), Martelarenlaan 42, B-3500 Hasselt, Belgium.
Interface engineering is the key to optimizing optoelectronic device performance, addressing challenges like reducing potential barriers, passivating interface traps, and controlling recombination of charges. Metal fluorides such as lithium fluoride are employed in interface modification within organic devices due to their strong dipole characteristics but carry health risks, high processing costs, and minimal impact on interface traps in organic electronics. Hence, this study investigates alternative metal chloride (MC) nanocrystals (sodium, cesium, rubidium, and potassium chlorides) that exhibit a strong dipole moment and are readily processable with the aim of reducing the influence of interface traps.
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