Lykkegaard Thybo (waspcave66)

We report a novel synthesis of CsPbX 3 perovskite nanoplates (PNPLs) driven by SnX 4 (X = Cl, Br, I) salts and address the role played by these hard Lewis acids in directing the formation of PNPLs. Sn 4+ disturbs the acid-base equilibrium of the system, increasing the protonation rate of oleylamine and inducing an anisotropic growth of the nanocrystals. Sn 4+ cations influence the reaction dynamics due to its complexation with oleylamine molecules. By monitoring the photoluminescence excitation and photoluminescence (PL) spectra of the PNPLs grown at different synthesis temperatures, we map the influence of the thickness on their optical properties. Time and spectrally resolved PL for colloidal dispersions with different optical densities, reveals that the dependence of the overall PL lifetime on the emission wavelength do not originate from energy transfer between PNPLs, but results from the contribution of PNPLs with distinct thickness, indicating that thicker PNPLs exhibit longer PL lifetimes. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.In order to improve the poor solvent resistance and poor temperature resistance caused by traditional sizing agents, crystalline poly(ether ether ketone) (PEEK) is introduced to the interfacial phases of carbon fiber (CF) reinforced PEEK composites by a soluble precursor named PEEK-1,3-dioxolane. By changing the soluble precursor molecular weight and concentration in the sizing solution, the content of PEEK coated on the CF fiber surface can be controlled and the different interfacial properties of the PEEK composites can be obtained. The results shows that, with this method, crystalline PEEK can be completely coated on the CF surface, and the interfacial shear strength of the PEEK composites increases from 43.42 to 83.13 MPa. Due to none of any soluble compounds in the PEEK composites, the interfacial layer is well preserved under organic solvents and hygrothermal conditions, and the interfacial shear strength (IFSS) of the PEEK composites maintained above 85.4% and 90.44%, respectively. Scanning electron microscope clarifies that the mechanism of interface enhancement comes from a better wetting of crystalline PEEK on the fiber surface. Additionally, the sizing system of this investagation has the potential commercial value because of no toxic reagent (such as 2,4,5-trichloro-1-hydroxy-benzene or concentrated sulfuric acid) is required during sizing. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Cotton fiber is a kind of biodegradable material which possesses the properties such as high specific area, adjustable shape and hygroscopicity. In this work, organic polymer was directly in situ grown on the surface of cotton thread and packed into PEEK tube for online in-tube solid-phase microextraction. The novel strategy solves the problems like high backpressure and tedious optimization process of normal monolithic polymer based in-tube SPME capillary. The quaternary ammonium typed ionic liquid of 1-allyl-methylimidazolium chloride, 4-vinylbiphenyl and ethylene dimethacrylate were co-polymerized and in situ grown on the surface of cotton thread as extraction phase. The SPME tube showed excellent performance for the extraction of three non-steroidal anti-inflammatory drugs including ketoprofen, naproxen and flurbiprofen due to the strong ion exchange and hydrophobic interactions. After online coupling with HPLC system by six-port valve, the method was applied for the quantitative analysis of non-steroidal anti-inflammatory drugs in human plasma samples showing good enrichment performance (enrichment factor between 263-279), high sensitivity, good linearity and good reproducibility. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.Histone modifications play important roles in regulating chromatin dynamic changes. In this study, acetylated histone H3 lysine 9 and 18 (H3K9ac and H3K18ac), acetylated histone