Department of Physics, Graduate School of Nanoscience & Technology (WCU), and KI for the NanoCentury, KAIST, Daejeon, Republic of Korea.
J Colloid Interface Sci. 2013 Apr 1;395:45-9. doi: 10.1016/j.jcis.2013.01.008. Epub 2013 Jan 12.
We report the silica encapsulation of toluene soluble single quantum dots (QDs) with various silica layer thicknesses. The photoluminescence of silica-encapsulated QD showed a blue shift as the silica layer increased. Although the measured decay lifetime and the quantum yields of the silica-encapsulated QDs decreased as the SiO2 layer increased, the silica-encapsulated QDs showed good photostability for certain silica layer thicknesses. Furthermore, photoblinking, the characteristic optical property of single QD, did not change after silica encapsulation. Silica encapsulation of toluene soluble QDs offers great potential for advanced optical applications.
我们报告了甲苯可溶性单量子点（QD）的二氧化硅封装，具有不同的二氧化硅层厚度。二氧化硅封装 QD 的光致发光随着二氧化硅层的增加而发生蓝移。尽管随着 SiO2 层的增加，测量的衰减寿命和量子产率降低，但对于某些二氧化硅层厚度，二氧化硅封装的 QD 显示出良好的光稳定性。此外，单 QD 的特征光学性质的光致闪烁在二氧化硅封装后没有改变。甲苯可溶性 QD 的二氧化硅封装为先进的光学应用提供了巨大的潜力。
