报告题目:具有金属荧光增强效应的纳米复合物的制备及应用
报告人:李立东
报告时间:2014年11月12日(星期三)下午 2:30
报告地点:必威西汉姆联官网闵行校区化学楼135报告厅
报告人简介:
李立东博士,现任北京科技大学材料科学与工程学院教授,博士生导师。2004 年于德国Max Planck Institute of Colloids and Interfaces获物理化学专业博士学位。2004年1月至2005年11月在德国Max Planck Institute of Colloids and Interfaces进行博士后研究。2005年12月至2007年1月,中国科学院理化技术研究所研究员,博士生导师。2007年至今,作为北京科技大学“高层次引进人才”到校从事科研与教学工作。近年来主要从事有机高分子光电功能材料的研究,在纳米光电器件制备与表征方面具有丰富的工作经验。作为课题负责人,主持承担国家自然科学基金面上项目及重大研究计划课题,科技部、教育部新世纪优秀人才等项目。
报告内容:
Metal-enhanced fluorescence (MEF) is an increase in the fluorescence of a fluorophore when it is in close proximity to a metallic nanostructure. This increase is due to a coupling of the oscillating dipole of the fluorophore with the plasmon resonance from the metal’s surface. Because of its high sensitivity, MEF has been widely used for the detection and imaging of biological species such as DNA, RNA and proteins. MEF effects greatly depend on the distance between the fluorophore and the metallic substrates, and this provides an opportunity for scientists to tune the MEF behavior of metallic nanostructures by varying the distance between the metallic substrates and fluorophores. A facile and flexible approach to tune this distance is to build an interlayer between the metallic nanostructure and the fluorophore, as the thickness is controllable by changing the preparation conditions.