一、引言
X射线单晶体衍射仪的英文名称是X-ray single cry stal diffractomet er,简写为XRD.
本仪器分析的对象是一粒单晶体,如一粒砂糖或一粒盐.在一粒单晶体中原子或原子团均是周期排列的.将X射线(如C u的Kα辐射)射到一粒单晶体上...一、引言
X射线单晶体衍射仪的英文名称是X-ray single cry stal diffractomet er,简写为XRD.
本仪器分析的对象是一粒单晶体,如一粒砂糖或一粒盐.在一粒单晶体中原子或原子团均是周期排列的.将X射线(如C u的Kα辐射)射到一粒单晶体上会发生衍射,由对衍射线的分析可以解析出原子在晶体中的排列规律,也即解出晶体的结构[1].物质或由其构成的材料的性能是与晶体的结构密切相关的,如金刚石和石墨都是由纯的碳构成的,由于它们的晶体结构不同就有着截然不同的性质.展开更多
ZnSe multipod-based structures,including tetrapod-like microrods,long microwires,and short nanorods,are selectively prepared by atmospheric pressure thermal evaporation of ZnSe nanoparticles without using any catalyst...ZnSe multipod-based structures,including tetrapod-like microrods,long microwires,and short nanorods,are selectively prepared by atmospheric pressure thermal evaporation of ZnSe nanoparticles without using any catalyst.The morphologies could be well controlled by simply adjusting the deposition position.The phase structures,morphologies,and optical properties of the products are investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),high-resolution transmission electron microscopy(TEM),and photoluminescence(PL) spectroscopy.A vapor-liquid mechanism is proposed for the formation of ZnSe multipod-based structures.The presented route is expected to be applied to the synthesis of other Ⅱ-Ⅵ groups or other group's semiconductor materials with controllable morphologies.展开更多
文摘一、引言
X射线单晶体衍射仪的英文名称是X-ray single cry stal diffractomet er,简写为XRD.
本仪器分析的对象是一粒单晶体,如一粒砂糖或一粒盐.在一粒单晶体中原子或原子团均是周期排列的.将X射线(如C u的Kα辐射)射到一粒单晶体上会发生衍射,由对衍射线的分析可以解析出原子在晶体中的排列规律,也即解出晶体的结构[1].物质或由其构成的材料的性能是与晶体的结构密切相关的,如金刚石和石墨都是由纯的碳构成的,由于它们的晶体结构不同就有着截然不同的性质.
文摘ZnSe multipod-based structures,including tetrapod-like microrods,long microwires,and short nanorods,are selectively prepared by atmospheric pressure thermal evaporation of ZnSe nanoparticles without using any catalyst.The morphologies could be well controlled by simply adjusting the deposition position.The phase structures,morphologies,and optical properties of the products are investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),high-resolution transmission electron microscopy(TEM),and photoluminescence(PL) spectroscopy.A vapor-liquid mechanism is proposed for the formation of ZnSe multipod-based structures.The presented route is expected to be applied to the synthesis of other Ⅱ-Ⅵ groups or other group's semiconductor materials with controllable morphologies.
