Career: Energy Transport in Conjugated Polymers Studied by Time- and Space-Resolved Spectroscopy

伊利诺伊大学的克里斯托弗·巴丁教授得到了实验物理化学项目职业奖的支持。他将使用超快时间分辨光学光谱学研究共轭聚合物中的能量传输。激发态共轭聚合物经历了从相干激子到非相干Forster类型的能量转移的转变；这一转变可以用偏振和相敏四波混频测量来跟踪。除了时间行为，Bardeen教授还将在荧光共振能量转移模式和阴极发光模式下使用近场光谱以空间分辨的方式研究这一现象。还将合成和研究导电聚合物的纳米晶体。巴丁教授的教学策略是让学生主动学习。对于研究生来说，重点之一是沟通和分析技能，这将通过定期、分级的科学研究报告来提高。本科生将讲授“真实世界化学”课程，以激励学生。光导聚合物聚(苯乙撑)目前是无机半导体的替代材料，特别是发光二极管(LED)。这项工作将产生理解这些材料如何传输能量所需的结果。Bardeen教授对研究生和本科生的教学都有很好的想法，这些想法都是深思熟虑的，并适应了当前的形势，面向未来的科学技术。

Professor Christopher Bardeen of the University of Illinois is supported by a CAREER award in the Experimental Physical Chemistry program. He will study energy transport in conjugated polymers using ultrafast time-resolved optical spectroscopy. Excited conjugated polymers undergo a transition from coherent exciton to incoherent Forster-type energy transfer; this transition can be followed using polarization and phase sensitive four-wave-mixing measurements. In addition to the time behavior, Professor Bardeen will study this phenomenon in a spatially resolved way using near field spectroscopy in fluorescence resonance energy transfer mode and cathodoluminescence mode. Nanometer sized crystals of the conducting polymers will also be synthesized and studied. Professor Bardeen's teaching strategy consists of "active" learning on the part of students. With graduate students, one emphasis is on communication and analytical skills which will be improved by regular, graded presentations on scientific research. With undergraduate students, "Real World Chemistry" lectures will be given to motivate students.The photoconducting polymer poly(phenylene vinylene) is currently of interest as an alternative to inorganic semiconductors, especially for light emitting diodes (LEDs). This work will produce results needed to understand how these materials transport energy. Professor Bardeen has excellent ideas about both graduate and undergraduate teaching which are thoughtful and adjusted to the current situation for the future of science and technology.