Silica encapsulation of hydrophobically ligated PbSe nanocrystals
Silica encapsulation of hydrophobically ligated PbSe nanocrystals
复制标题
DOI：
10.1021/la0529658
复制
发表时间：
2006-04-25
期刊：
影响因子：
3.9
通讯作者：
Nann, T
中科院分区：
文献类型：
--
作者：
Darbandi, M;Lu, WG;Nann, T
在反胶束体系中，通过金属醇盐的水解和微乳液体系中的缩合反应，成功地合成了球形PbSe@SiO2纳米粒子。这些核壳纳米粒子的特征在于透射电子显微镜（TEM），近红外吸收光谱，能量色散X射线分析，和TEM电子衍射。结果表明，所得核壳结构为球形，粒径分布窄（平均粒径约35 nm），表面光滑。通过控制微乳液中正硅酸乙酯（TEOS）的水解和缩合反应的相对速率，可以控制粒子的大小和壳的厚度。
Spherical PbSe@SiO2 nanoparticles have been successfully synthesized within reverse micelles via metal alkoxide hydrolysis and condensation within a microemulsion system. These core-shell nanoparticles were characterized by transmission electron microscopy (TEM), NIR absorption spectroscopy, energy-dispersive X-ray analysis, and TEM electron diffractions. It shows that the obtained core-shell structures have a spherical shape with narrow size distribution (average size approximately 35 nm) and smooth surfaces. The size of the particles and the thickness of the shells can be controlled by manipulating the relative rates of the hydrolysis and condensation reactions of tetraethoxysilane (TEOS) within the microemulsion.