The interface formations of the heterojunctions concerning Ⅳ and Ⅱ Ⅵ semiconductors were studied via synchrotron radiation photoemission spectroscopy. Experimental results show that the overlayer growths of Si...The interface formations of the heterojunctions concerning Ⅳ and Ⅱ Ⅵ semiconductors were studied via synchrotron radiation photoemission spectroscopy. Experimental results show that the overlayer growths of Si or Ge on Ge, ZnSe and ZnS substrates are in compliance with an ideal two dimensional (2D) growth mode. However, deviations from 2D mode were also observed during the interfaces formation of Ge/CdTe and Si/CdTe, and are ascribed to large lattice mismatching and interfacial reaction.展开更多
An iron（Ⅱ） formate [H3CO3][Fe（HCO2）3] （1） has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis. Complex 1 crystallizes in the orthorhombic system, sp...An iron（Ⅱ） formate [H3CO3][Fe（HCO2）3] （1） has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis. Complex 1 crystallizes in the orthorhombic system, space group Pnna with a = 8.4130（4）, b = 11.8306（6）, c = 8.9468（4）A, a = 106.527（4）, β = 105.876（4）, 7 = 103.173（4）°, Mr= 253.94, V= 890.48（7） A3, Z= 4, Dc = 1.894 g/cm3,μ = 1.721 mm^-1, F（000） = 512, Rint = 0.0164, the final R = 0.0323 and wR = 0.0998 for 979 observed reflections （I 〉 2σ（I））. 1 exhibits a 3D open microporous framework formed by formate anions bridging Fe（Ⅱ） ions.展开更多
We have performed a multi-wavelength study toward a quasi-sinusoidal filament(CFG028.68–0.28). A new large-scale ^12CO J = 3-2 map was obtained from the China-Cologne Observation for Sub Millimeter Astronomy(CCOSMA) ...We have performed a multi-wavelength study toward a quasi-sinusoidal filament(CFG028.68–0.28). A new large-scale ^12CO J = 3-2 map was obtained from the China-Cologne Observation for Sub Millimeter Astronomy(CCOSMA) 3m radio telescope. Based on the ATLASGAL catalog, we have identified 27 dust clumps in the filament. Through the relationship between the mass and radius of these clumps, 67% of these clumps are dense and massive enough to potentially form massive stars. The obtained CFE is ~11% in the filament. The filament has a linear mass density of ~305 M⊙pc^-1, which is smaller than its critical mass to length ratio. This suggests that the external pressure from the neighboring H Ⅱ regions may help prevent the filament from dispersing under the effects of turbulence. Comparing the energy injection from outflows and H Ⅱ regions in the filament, the ionization feedback from the H Ⅱ regions can help maintain the observed turbulence.展开更多
文摘The interface formations of the heterojunctions concerning Ⅳ and Ⅱ Ⅵ semiconductors were studied via synchrotron radiation photoemission spectroscopy. Experimental results show that the overlayer growths of Si or Ge on Ge, ZnSe and ZnS substrates are in compliance with an ideal two dimensional (2D) growth mode. However, deviations from 2D mode were also observed during the interfaces formation of Ge/CdTe and Si/CdTe, and are ascribed to large lattice mismatching and interfacial reaction.
基金supported by the National Natural Science Foundation of China (No.21041005)
文摘An iron（Ⅱ） formate [H3CO3][Fe（HCO2）3] （1） has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis. Complex 1 crystallizes in the orthorhombic system, space group Pnna with a = 8.4130（4）, b = 11.8306（6）, c = 8.9468（4）A, a = 106.527（4）, β = 105.876（4）, 7 = 103.173（4）°, Mr= 253.94, V= 890.48（7） A3, Z= 4, Dc = 1.894 g/cm3,μ = 1.721 mm^-1, F（000） = 512, Rint = 0.0164, the final R = 0.0323 and wR = 0.0998 for 979 observed reflections （I 〉 2σ（I））. 1 exhibits a 3D open microporous framework formed by formate anions bridging Fe（Ⅱ） ions.
基金supported by the National Natural Science Foundation of China (Grant Nos. 11363004, 11433008, 11633007, 11703040, 11743007, 11773014,11847309 and 11851305)the Youth Innovation Promotion Association of CAS+1 种基金the National Key R&D Programs of China (Nos. 2017YFA0402600 and 2015CB857100)supported by the Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
文摘We have performed a multi-wavelength study toward a quasi-sinusoidal filament(CFG028.68–0.28). A new large-scale ^12CO J = 3-2 map was obtained from the China-Cologne Observation for Sub Millimeter Astronomy(CCOSMA) 3m radio telescope. Based on the ATLASGAL catalog, we have identified 27 dust clumps in the filament. Through the relationship between the mass and radius of these clumps, 67% of these clumps are dense and massive enough to potentially form massive stars. The obtained CFE is ~11% in the filament. The filament has a linear mass density of ~305 M⊙pc^-1, which is smaller than its critical mass to length ratio. This suggests that the external pressure from the neighboring H Ⅱ regions may help prevent the filament from dispersing under the effects of turbulence. Comparing the energy injection from outflows and H Ⅱ regions in the filament, the ionization feedback from the H Ⅱ regions can help maintain the observed turbulence.
