Career: New Materials for Photonics

这个职业奖给尼古拉斯·A。俄克拉荷马州州立大学的科托夫得到了化学系先进材料项目的支持。 研究的重点是化学修饰的半导体纳米团簇的合成和表征，其中修饰包括将过渡金属络合物配位结合到纳米团簇表面上的硫属元素化物原子。具体而言，稳定的镉硫族化物纳米团簇将通过与铜和钌胺络合物的反应来制备和表面改性。化学修饰的纳米团簇将通过TEM、XRD、ESR、NMR、MS以及发射和吸收光谱来表征。光学性质将通过时间分辨荧光光谱、泵浦-探测光谱和斯塔克光谱进行研究。半导体纳米团簇与表面结合的过渡金属络合物之间的电子相互作用对纳米团簇的非线性光学性质包括二次和三次谐波产生有显著影响。通过调整纳米粒子的光学性质以适应特定的应用，硫属化物改性体系将为制备新型发光和非线性光学材料提供新的途径。CAREER教育计划将整合光子学领域的研究和教育。具体来说，将制定一个课程，以支持新的跨学科光子学博士学位。俄克拉荷马州的一个项目。光学，光谱学，显微镜和半导体合成的实验室课程将制定。这些课程，在音乐会与工业实习和光子学业务讲座系列将准备博士学位。学生具备必要的技能，无论是在商业或学术部门的有意义的职业生涯。

This CAREER award to Nicholas A. Kotov at Oklahoma State University is supported by the Advanced Materials Program in the Chemistry Division. The focus of the research is the synthesis and characterization of chemically modified semiconductor nanoclusters where the modification consists of coordinatively binding transition metal complexes to the chalcogenide atoms on the nanocluster surface. Specifically, stabilized cadmium chalcogenide nanoclusters will be prepared and surface modified by reaction with copper and ruthenium amine complexes. The chemically modified nanoclusters will be characterized by TEM, XRD, ESR, NMR, MS, and emission and absorption spectroscopy. Optical properties will be studied by time-resolved fluorescence spectroscopy, pump-probe spectroscopy and Stark spectroscopy. Electronic interactions between the semiconductor nanocluster and the surface bound transition metal complex markedly effect the nonlinear optical properties of the nanoclusters including second and third harmonic generation. By adapting optical properties of nanoparticles to a particular application, chalcogenide modified systems will provide a new pathway for the preparation of novel light-emitting and nonlinear optical materials.The CAREER educational plan will integrate research and education in the area of photonics. Specifically, a curriculum will be developed in support of the new interdisciplinary Photonics Ph. D. program at Oklahoma State. Laboratory courses in optics, spectroscopy, microscopy and semiconductor synthesis will be formulated. These courses, in concert with industrial internships and a photonics business lecture series will prepare Ph.D. students with the necessary skills for meaningful careers either in the business or academic sectors.