报告题目：Controlling lanthanide luminescence in core-shell nanoparticles

主讲嘉宾：王锋博士 香港城市大学

讲座主持：方岩雄教授

时间：2017年10月10日（周二）下午16：00-17:00

地点：广东工业大学工学四号馆202会议室

嘉宾简介：

王锋博士于2001年和2006年分别于浙江大学获工学学士和博士学位。博士期间在王民权教授和樊先平教授的指导下主要开展镧系掺杂氟化物发光纳米晶体的制备和性能研究。博士毕业后加入新加坡国立大学化学系刘小钢教授课题组从事博士后研究，工作拓展到镧系掺杂纳米微粒合成方法的优化和发光性质的精细调控。2012年9月加入香港城市大学，2017年7月晋升为副教授，获终身教职。王锋博士目前的研究工作主要集中在新型微纳结构发光材料的制备、机理及其在生物和光子学领域的应用，至今已在Nature，Nature Materials，Nature Communications，Chem. Soc. Rev.，Angew. Chem. Inter. Ed.，J. Am. Chem. Soc.等期刊发表论文60余篇，他引一万余次(Google Scholar)。

报告摘要:

Spectral conversion of light radiation is essential for a variety of modern-day technologies including displays, photovoltaics, data storage, and cancer therapy. In the past decades, a variety of luminescent materials, including organic dyes and semiconductor quantum dots, were developed to realize photon energy conversion in the ultraviolet (UV) to near infrared (NIR) spectral range. However, practical application of these techniques is typically limited by constraints such as toxicity and/or poor stability. In this regard, lanthanide-doped nanoparticles have been developed as a promising alternative to conventional luminescent nanomaterials. By comparison, these nanoparticles offer low cytotoxicity, sharp emission peaks, long-lived excited electronic states, as well as high stability against photo bleaching and chemical degradation. In this talk, I focus on our recent efforts on lanthanide-doped core-shell nanoparticles that are generally composed of a layer-by-layer structure with a set of lanthanide ions incorporated into separate layer. Examples will be given to demonstrate how to tune the luminescence process and enhance multiphoton upconversion emission for exciting new technological applications.