主题：Shaping lanthanide luminescence in core-shell nanoparticles
主讲人：Feng WANG
1Department of Physics and Materials Science, City University of Hong Kong
2City University of Hong Kong Shenzhen Research Institute
时间：2015年6月8日（周一） 14:00
地点：18-918 （理学院会议室）
报告摘要：
Spectral conversion of light irradiation 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 frequently limited by constraints such as toxicity and/or poor stability. Herein, we present an alternative class of luminescent nanomaterials based on lanthanide ions doped in core-shell nanostructures to realize tunable emissions across UV to NIR spectral region. We show that highly flexible luminescence processes can be created in a single material by controlling the dopant composition and distribution of dopant ions in the host lattice through use of core-shell nanostructures. The enhanced ability to manipulate photon energy opens up exciting new opportunities for technological applications.
人物名片：
香港城市大学助理教授。2001年9月毕业于浙江大学并获工学学士学位。同年9月保送浙大学材料科学与工程学系攻读博士研究生，师从王民权和樊先平教授探索镧系掺杂纳米发光纳米材料的合成和性质，期间于2004-2006年进入新加坡国立大学张勇教授课题组尝试镧系掺杂发光纳米微粒在生物标记方面的应用。2006年12月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，研究工作拓展到镧系掺杂纳米微粒合成方法的优化，并以此为基础研究镧系离子在纳米微粒中发光机理及控制方法。2012年9月加入香港城市大学，继续深入探索新型发光材料的开发及其应用技术的完善。近年来共计在Nature, Nat. Mater., Nat. Commun., Chem. Soc. Rev., Angew. Chem. Int. Ed., J. Am. Chem. Soc.， Sci. Rep.等国际学术期刊上发表SCI 收录学术论文40 余篇，他引6000 余次。
近五年代表性论文：
1. F. Wang, Y. Han, C. S. Lim, Y. Lu, J. Wang, J. Xu, H. Chen, C. Zhang, M. Hong, X. Liu, Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping.Nature 2010, 463, 1061.
2. F. Wang, R. Deng, J. Wang, Q. Wang, Y. Han, H. Zhu, X. Chen, X. Liu,Tuning upconversion through energy migration in core–shell nanoparticles.Nat. Mater. 2011, 10, 968.
3. H. Wen, H. Zhu, X. Chen, T. F. Hung, B. Wang, G. Zhu, S. F. Yu, F. Wang*,Upconverting near-infrared light through energy management in core–shell–shell nanoparticles.Angew. Chem., Int. Ed. 2013, 52, 13419.
4. Q. Su, S. Han, X. Xie, H. Zhu, H. Chen, C.-K. Chen, R.-S. Liu, X. Chen, F. Wang*, X. Liu*, The effect of surface coating on energy migration-mediated upconversion.J. Am. Chem. Soc. 2012, 134, 20849.
5. F. Wang, J. Wang, X. Liu,Direct evidence of a surface quenching effect on size-dependent luminescence of upconversion nanoparticles.Angew. Chem., Int. Ed. 2010, 49, 7456.
6. F. Wang*, R. Deng, X. Liu*, Preparation of core-shell NaGdF4 nanoparticles doped with luminescent lanthanide ions to be used as upconversion-based probes. Nat. Protoc. 2014, 9, 1634.
7. F. Wang, X. Liu, Multicolor tuning of lanthanide-doped nanoparticles by single wavelength excitation. Acc. Chem. Res. 2014, 47, 1378.
8. X. Chen, D. Peng, Q. Ju, F. Wang*, Photon upconversion in core-shell nanoparticles. Chem. Soc. Rev, 2015, 44, 1318.
9. F. Ai, Q. Ju, X. Zhang, X. Chen, F. Wang*, G. Zhu*, A core-shell-shell nanoplatformupconverting near-infrared lightat 808 nm for luminescence imaging and photodynamic therapy of cancer. Sci. Rep.2015,5, 10785; doi:10.1038/srep10785.
10. D. Peng, Q. Ju, X. Chen, R. Ma, B. Chen, G. Bai, J. Hao, X. Qiao, X. Fan, F. Wang*, Lanthanide-doped energy cascade nanoparticles: Full spectrum emission by single wavelength excitation.Chem. Mater. 2015, 27, 3115.
11. Q. Ju, X. Chen, F. Ai, D. Peng, X. Lin, W. Kong, P. Shi, G. Zhu, F. Wang*, An upconversionnanoprobe operating in the first biological window.J. Mater. Chem. B 2015, 3, 3548.
