A new wurtzite (WZ) structure CuInS 2 , space group P6 3 mc, a ) 3.90652(13) Å, c ) 6.42896(23) Å, has been synthesized by a one-step solvothermal method. Analogous with the disordered zinc-blende structure, wurtzite structure is metastable at room temperature and considered as a disordered polymorph of chalcopyrite (CH) structure, where Cu and In atoms randomly occupy the cation sublattice positions. It is believed that the solvent of ethanolamine plays an important role in the synthesis of WZ-CuInS 2 . The coordination between Cu 2+ and -NH 2 of ethanolamine molecules favors the nucleation and growth of WZ-CuInS 2 . Differential scanning calorimeter, together with X-ray diffraction analysis, revealed a phase transition from WZ-CuInS 2 to CH-CuInS 2 when WZ-CuInS 2 was heated to certain temperature. The visible and near-infrared absorption spectra show that the as-prepared nanostructured WZ-CuInS 2 has distinct optical properties compared with conventional CH-CuInS 2 .
Synthetic messenger RNA (mRNA) switches are powerful tools for in situ cell purification, especially for cells derived from stem cells. However, the retention effectiveness of the target cells is limited by the leaky expression of toxic protein. The elimination efficiency of non‐target cells is also constrained due to the lack of signal amplification. In this study, we designed a novel approach that uses synthetic mRNA switch to convey intracellular marker molecule information into spatially controlled extracellular toxic assembly formation. The approach bypasses the use of toxic protein to ensure high target cell recovery effectiveness. Meanwhile, the marker molecule information is amplified at multiple levels to ensure high non‐target cell elimination effectiveness. Our approach can be tailored to meet various in situ cell purification needs, promising high‐quality in situ cell purification for a wide range of biomedical applications.
Synthetic messenger RNA (mRNA) switches are powerful tools for in situ cell purification, especially for cells derived from stem cells. However, the retention effectiveness of the target cells is limited by the leaky expression of toxic protein. The elimination efficiency of non‐target cells is also constrained due to the lack of signal amplification. In this study, we designed a novel approach that uses synthetic mRNA switch to convey intracellular marker molecule information into spatially controlled extracellular toxic assembly formation. The approach bypasses the use of toxic protein to ensure high target cell recovery effectiveness. Meanwhile, the marker molecule information is amplified at multiple levels to ensure high non‐target cell elimination effectiveness. Our approach can be tailored to meet various in situ cell purification needs, promising high‐quality in situ cell purification for a wide range of biomedical applications.
Rb-substitued Pr1−xRbxMnO3 (0.05≤x≤0.08) was successfully synthesized by solid state reaction. Powder X-ray diffraction showed that all the compounds were orthorhombic with the space group of Pnma. Spin glass behaviors were observed for all the compounds at low temperature, suggesting the competition between ferromagnetic and antiferromagnetic. The temperature dependence of the resistivity for the compound Pr0.92Rb0.08MnO3.02 at 0 and 2 T magnetic field was also investigated. The compound shows semiconducting behavior, and the band gap is 0.3 eV. The maximum magnetoresistance is about 30% at 2 T magnetic field near 116 K.
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