2018-01-04 10:07   高层次人才办公室 审核人:   (点击: )

报告题目:Upconversion Nanocrystals: Luminescence Modulation for Nanophotonic Applications





The talk will presentLanthanide-doped nanoparticles exhibit unique luminescent properties, including a large Stokes shift, a sharp bandwidth of emission, high resistance to optical blinking, and photobleaching. Uniquely, they can also convert long-wavelength stimulation into short-wavelength emission.These attributes offer the opportunity to develop alternative luminescent labels to organic fluorophores and quantum dots. In recent years, researchers have taken advantage of spectral-conversion nanocrystals in many important biological applications, such as highly sensitive molecular detection and autofluorescence-free cell imaging. With significant progress made over the past several years, we can now design and fabricate nanoparticles that display tailorable optical properties. In particular, we can generate a wealth of color output under single-wavelength excitation by rational control of different combinations of dopants and dopant concentration. By incorporating a set of lanthanide ions at defined concentrations into different layers of a core-shell structure, wehave expanded the emission spectra of the particles to cover almost the entire visible region, a feat barely accessible by conventional bulk phosphors.This talkwill highlight recent advances in the broad utility of upconversion nanocrystals for multimodal imaging, bio-detection, display and photonics.


刘小钢教授现为新加坡国立大学教授,在新加坡科学院材料工程研究所兼任高级研究员,主要从事纳米材料制备和自组装、生物无机化学和超分子化学、催化表面科学、光电太阳能技术、传感器和生物医学应用等方面研究。近五年来在红外上转换发光材料领域取得了多项重大技术突破,有多项国际发明专利,并在Science、Nature、Nature Materials、Nature Nanotechnology、Nature Communications、Journal of the American Chemical Society、Angewandte Chemie International Edition和Advanced Materials等国际顶级学术期刊上发表论文120多篇,被引用1.7万多次,最高单篇引用1700多次,连续多年被汤姆森路透集团统计为国际高被引学者,是2016年新加坡科技最高奖——总统科学奖得主,2017年获新加坡国立大学杰出研究员奖。