Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum ...Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum extinction coefficient of 0.011.The direct optical band gap,Urbach energy and steepness parameter of the synthesized CZTS thin film were 1.52 eV,0.52 eV and 0.05 respectively.The CZTS thin film was found to be polycrystalline tetragonal in nature.The scanning electron microscopy(SEM)revealed that the texture structure was formed for the CZTS thin film.展开更多
Objective:To investigate the elemental composition of the leaves and flowers of Catharanthus roseus(C.roseus) due to the plant's wide application in the indigenous medicinal system and its chemical constituents...Objective:To investigate the elemental composition of the leaves and flowers of Catharanthus roseus(C.roseus) due to the plant's wide application in the indigenous medicinal system and its chemical constituents' importance.Methods:The atomic absorption spectrophotometer was used for quantitative analysis of various elements.Results:Total 13 important elements were analyzed in leaves and flowers of C.roseus.Results indicated the presence of Na,K,Ca,Mg,Cr,Fe,Zn,Al,Cu,Ni,Pb,Cd and Mn in both leaves and flowers.The most important finding of the work was that,leaves of C.roseus showed high concentration of all elements except K and Zn while flowers of C.roseus showed higher concentration of K and Zn.Conclusions:The elemental composition in both leaves and flowers of C.roseus were found to be different.Therefore,different parts of this medicinal plant are enriched in some micro and macro nutrients like Fe,Ca,Na,K,Zn,which are very important for biological metabolic system as well as human health.展开更多
文摘Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum extinction coefficient of 0.011.The direct optical band gap,Urbach energy and steepness parameter of the synthesized CZTS thin film were 1.52 eV,0.52 eV and 0.05 respectively.The CZTS thin film was found to be polycrystalline tetragonal in nature.The scanning electron microscopy(SEM)revealed that the texture structure was formed for the CZTS thin film.
基金supported by Bangladesh Council of Scientific and Industrial Research
文摘Objective:To investigate the elemental composition of the leaves and flowers of Catharanthus roseus(C.roseus) due to the plant's wide application in the indigenous medicinal system and its chemical constituents' importance.Methods:The atomic absorption spectrophotometer was used for quantitative analysis of various elements.Results:Total 13 important elements were analyzed in leaves and flowers of C.roseus.Results indicated the presence of Na,K,Ca,Mg,Cr,Fe,Zn,Al,Cu,Ni,Pb,Cd and Mn in both leaves and flowers.The most important finding of the work was that,leaves of C.roseus showed high concentration of all elements except K and Zn while flowers of C.roseus showed higher concentration of K and Zn.Conclusions:The elemental composition in both leaves and flowers of C.roseus were found to be different.Therefore,different parts of this medicinal plant are enriched in some micro and macro nutrients like Fe,Ca,Na,K,Zn,which are very important for biological metabolic system as well as human health.
