Park Won Ji, Kim Ju Eun, Lee Ho Jeong, Park Chan Gyung, Heo Jong
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37937, Republic of Korea.
Sci Rep. 2019 Jul 11;9(1):10029. doi: 10.1038/s41598-019-46574-1.
The first 3-D direct observation of clusters of Nd oxide inside silicate glasses was achieved using atom probe tomography. Three-dimensional elemental maps of major chemical elements in glasses such as Si, Al, Zn and O showed no evidence of regions that had concentrations higher than the average values, whereas the Nd aggregated into regions of high concentration. Elemental maps of Nd and Pb recorded from the glasses containing PbS QDs showed highly-concentrated areas of both elements at the same locations; this result indicates that PbS QDs formation started in association with the Nd clusters.
利用原子探针断层扫描技术首次实现了对硅酸盐玻璃中氧化钕团簇的三维直接观察。玻璃中主要化学元素如硅、铝、锌和氧的三维元素图显示，没有证据表明存在浓度高于平均值的区域，而钕聚集在高浓度区域。从含有硫化铅量子点的玻璃中记录的钕和铅的元素图显示，两种元素在相同位置都有高浓度区域；这一结果表明，硫化铅量子点的形成与钕团簇有关。
