【摘要】 利用表面活性剂双层修饰技术在水溶性荧光CdTe纳米晶表面先后包覆了双十八烷基二甲基溴化铵和十二烷基硫酸钠,从而在纳米晶外表面引入—SO4-反应位点,以—SO4-为活性中心进一步制备了包覆CdTe纳米晶的BaSO4复合荧光微球.通过扫描电子显微镜、透射电子显微镜、共聚焦荧光显微镜和X射线粉末衍射等方法确定了复合微球的尺寸及组成.由于BaSO4的保护,CdTe-BaSO4复合微球荧光的耐酸性比CdTe原液的提高明显.更多还原

【Abstract】 On the basis of the technique of surfactant bilayer modification,aqueous luminescent CdTe nanocrystals(NCs)were modified with DODAB layer and SDS layer.Due to the introduction of SO-4 sites on NC surface from SDS layer,NCs were further incorporated into BaSO4 composite microspheres through the stepwise addition of Ba2+ and SO2-4.The size and the composition of microspheres were characterized via SEM,TEM,confocal fluorescence microscope and XRD.Owning to the protection of BaSO4,the photoluminescence of as-prepared BaSO4-CdTe microspheres were more antacid than the original aqueous CdTe NCs.更多还原