报告主题: Luminescent nanofibrous membranes

报告时间: 2015年10月9日下午2点

报告地点: 东华大学研究院209

报告人及简介: Hak Yong KimPh.D., Professor

Chonbuk National University (CBNU)

Dr. Kim has completed his PhD from Textile Eng., Seoul National University, Korea. He is professor at Department of BIN Fusion Technology &Department of Organic Materials and Fiber at Chonbuk National University. He has published more than 290 papers in reputed journals (h-index 39) and has been serving as an editorial board member of three international journals (Macromolecular Research, Fibers and Polymers, Korean Tissue Engineering and Regenerative Medicine Society). His research interests including: Biomaterials, Polymer composites, Inorganic materials, Carbon nanofibers, Functional materials like Semiconductor, Electrocatalytic, Phocatalytic materials, Hydrogen and fuel cells.

报告大纲: Novel luminescent and amorphousLa₂O₃-ZrO₂ : Eu³⁺ (LZE) nanofibrous membranes with robust softness are fabricated for the first time via a facile electrospinning technique. By employing zirconium oxide incorporation, the as-prepared lanthanum oxide nanofibrous membranes can be dramatically changed from the extreme fragility to robust softness. Meanwhile, the softness and luminescent performance of LZE nanofibrous membranes can be finely controlled by regulating the doping concentration of zirconium oxide and europiumin lanthanum oxide nanofibers. Additionally, the crystal structure analysis using X-ray diffractometer and high resolution transmission electron microscopy measurements have confirmed the correlation between the amorphous structure and softness. Furthermore, LZE membranes show the characteristic emission of Eu³⁺ corresponding to ⁵D_{0, 1, 2} - ⁷F_{0, 1, 2, 3, 4} transitions due to an efficient energy transfer from O^2- to Eu³⁺. The LZE nanofibrous membranes with the optimum doping Eu³⁺ concentration of 3 mol%, the as-prepared LZE membranes exhibit excellent softness and luminescent properties, which make the materials have potential applications in fluorescent lamps and field emission displays.