Study on mechanism of increase in fluorescence intensity of nanoparticles by irradiation of laser and engineering applications

本项目主要研究了激光辐照纳米粒子对纳米粒子光学性质的改善及其应用。我们得到了以下结果。(1)激光辐照增强ZnO纳米颗粒荧光强度的机理是激光辐照下光化学合成的高度结晶的ZnO层钝化了ZnO纳米颗粒表面的缺陷，增强了荧光强度。(2)各种纳米粒子的光学性能通过表面钝化得到改善。(3)成功地实现了对工程应用具有重要意义的高功能化纳米粒子的快速制备。

In this project, we have studied the improvement of optical properties of nanoparticles by the irradiation of laser and their applications. We have obtained the following results.(1) The mechanism of increase in fluorescence intensity of ZnO nanoparticles by the irradiation of laser was that the passivation of surface defects on ZnO nanoparticles by highly crystalline ZnO layer which was synthesized photochemically with the irradiation of laser increased fluorescence intensity.(2) The optical properties of various nanoparticles were improved by the surface passivation.(3) The rapid preparation of highly functionalized nanoparticles which was important for engineering applications was successfully done.