过渡族金属(TM,Transition Metal)掺杂的II-VI 化合物半导体在2~3μm 波段展现出较佳的中红外发光性能,Cr2+离子掺杂的硒化锌(ZnSe:Cr2+)就是其中引人瞩目的材料,在气体检测、大气遥感、激光通信等领域有着广泛的应用前景.
采用提拉法生长Ba2TiSi2O8晶体,并得到尺寸为35 mm×35 mm×50 mm的优质透明单晶.锥光干涉表明所生长的晶体的具有较好的光学均匀性,高分辨X射线衍射表明晶体晶格完整、品质较好.测量了晶体室温透过光谱,结果表明[100]和[001]方向上晶体的透过率接近,300-1500nm范围内的透光率高达85%,晶体的吸收边为270nm.
:采用高温显微Raman光谱的方法对TeO2晶体、熔体及生长边界层的微观结构进行了研究,指认了TeO2晶体及其熔体的Raman光谱谱峰,解析了晶体高温Raman 谱图各谱峰的展宽、频移,提出了熔体可能的结构基团及晶体生长机制,并对晶体生长习性作出了较好的解释,为研究实际晶体材料生长提供了一定依据.
Organisms can use organic molecules containing a variety of functional groups,including OH and COOH to control calcite growth in biomineralization process.
By altering the concentration of diaminocyclohexane tetra-acetic acid (DCTA) additive in the growth solution,a series of potassium dihydrogen phosphate (KDP) crystals were obtained at growth rate of 1