In this paper,the fracture surfaces of a light-conversion film were observed using a scanning electron microscope(SEM),and then,the fluorescence spectra and mechanical properties of the film were tested.The SEM result...In this paper,the fracture surfaces of a light-conversion film were observed using a scanning electron microscope(SEM),and then,the fluorescence spectra and mechanical properties of the film were tested.The SEM results show that the average diameter of the light conversion agent is 500 nm.The results of the mechanical properties tests show that the tensile strengths of light-conversion film increase from9.86 to 12.16 MPa and that the strain at breakage increases from 2.37%to 2.75%.In addition,the application effects of the light-co nversion film were studied.The results indicate that plant height,length of the maximum leaf,width of the maximum leaf and breadth of the plants increase by 24.43%,15.30%,15.60%and 19.07%,respectively.The quality of Chinese flowering cabbages treated with the lightconversion film is superior,including a 9.09%increase in the soluble protein content,a 21.27%increase in the polyphenol content,and a 19.15%increase in the soluble sugar content.Based on these results,light-conversion films can be applied in agricultural production.展开更多
采用杂化密度泛函B3LYP理论,对Si_5及Li原子修饰的Si_5团簇的几何结构和电子性质及储氢性能进行了研究。结果表明:Si_5团簇最低能量构型为笼型结构,纯笼型Si_5团簇不能有效地吸附氢分子;Li原子的修饰可以显著改善其储氢能力,在两个Li原...采用杂化密度泛函B3LYP理论,对Si_5及Li原子修饰的Si_5团簇的几何结构和电子性质及储氢性能进行了研究。结果表明:Si_5团簇最低能量构型为笼型结构,纯笼型Si_5团簇不能有效地吸附氢分子;Li原子的修饰可以显著改善其储氢能力,在两个Li原子端位修饰Si_5笼型团簇体系中,其氢分子的平均吸附能为7.259~11.330 k J/mol,每个Li原子周围可以有效吸附5个氢分子,储氢质量分数达11.554%。因此,Li修饰Si_5笼型团簇体系有望成为理想的储氢材料。展开更多
基金Project supported by the National Natural Science Foundation of China(21671070)Key Realm R&D Program of Guangdong Province(2019B020214001,2019B020223001)+2 种基金China Agriculture Research System(CARS-26)Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams(2019LM119)the National Undergraduate Innovation and Entrepreneurship Training Program granted for Gening Xie(201910564035)。
文摘In this paper,the fracture surfaces of a light-conversion film were observed using a scanning electron microscope(SEM),and then,the fluorescence spectra and mechanical properties of the film were tested.The SEM results show that the average diameter of the light conversion agent is 500 nm.The results of the mechanical properties tests show that the tensile strengths of light-conversion film increase from9.86 to 12.16 MPa and that the strain at breakage increases from 2.37%to 2.75%.In addition,the application effects of the light-co nversion film were studied.The results indicate that plant height,length of the maximum leaf,width of the maximum leaf and breadth of the plants increase by 24.43%,15.30%,15.60%and 19.07%,respectively.The quality of Chinese flowering cabbages treated with the lightconversion film is superior,including a 9.09%increase in the soluble protein content,a 21.27%increase in the polyphenol content,and a 19.15%increase in the soluble sugar content.Based on these results,light-conversion films can be applied in agricultural production.
文摘采用杂化密度泛函B3LYP理论,对Si_5及Li原子修饰的Si_5团簇的几何结构和电子性质及储氢性能进行了研究。结果表明:Si_5团簇最低能量构型为笼型结构,纯笼型Si_5团簇不能有效地吸附氢分子;Li原子的修饰可以显著改善其储氢能力,在两个Li原子端位修饰Si_5笼型团簇体系中,其氢分子的平均吸附能为7.259~11.330 k J/mol,每个Li原子周围可以有效吸附5个氢分子,储氢质量分数达11.554%。因此,Li修饰Si_5笼型团簇体系有望成为理想的储氢材料。
