有机纳米线异质结的制备及在纳米光子学中的应用.doc

有机纳米线异质结的制备及在纳米光子学中的应用郑剑耀 1,2，闫永丽 1，王晓鹏 1,2，赵永生 1,*，姚建年 1,*1 中国科学院化学研究所，北京市中关村北一街 2 号，1001902中国科学院研究生院，北京市石景山区玉泉路 19 号甲，100049*Email: yszhao@, jnyao@通过液相自组装和物理气相沉积的两步法，我们成功制备出了以三（8-羟基喹啉）铝为主干，1,5- 二氨基蒽醌为分枝的有机发光纳米线异质结通过激光激发异质结的主干部分，可以实现在不同分枝终端输出不同的光信号（不同的颜色） ；并且通过改变激发光的偏振态，可以实现对输出信号的有效调制我们的研究结果是纳米光子学的一个重要突破，对于未来的光通讯和光子计算机的发展具有重大意义关键词：有机发光材料；纳米线；异质结；光子学参考文献[1] Zheng, J. Y.; Yan, Y. L.; Wang, X. P.; Zhao, Y. S.; Yao, J. N. J. Am. Chem. Soc. 2012, in press.[2] Yan, H.; He, R.; Johnson, J.; Law, M.; Saykally, R. J.; Yang, P. J. Am. Chem. Soc. 2003, 125, 4728.Organic Nanowire Heterojunction: Preparation and Photonic ApplicationsJian Yao Zheng1,2, Yongli Yan1, Xiaopeng Wang1,2, Yong Sheng Zhao1,*, Jiannian Yao1,*1 Institut of Chemistry, Chinese Academy of Sciences, Beijing, 100190 2Graduate School, Chinese Academy of Sciences, Beijing, 100049 Dendritic organic heterojunctions with aluminum tris(8-hydroxyquinoline) (Alq3) microwire trunks and 1,5-diaminoanthraquinone (DAAQ) nanowire branches were prepared through a two-step growth. The prefabricated Alq3 microwires act as the nucleation centers for the site-specific secondary vapor growth of DAAQ nanowires, resulting in the unique dendritic heterostructures. When the trunk was excited with a focused laser beam, emitted light with different colors could be simultaneously channeled from the branched nanowires via both waveguiding and energy transfer. By changing the polarization of the incident light, the intensity of the out-coupled emissions Fig. 1 Characterization of the organic heterojunctions. (A) and (B) SEM images of the Alq3-DAAQ dendritic heterostructures. (C) TEM image of a single NWHJ. Insets: SAED patterns of the Alq3 trunk and DAAQ branch. (D) PL microscopy images of the NWHJs excited with the mercury lamp.Fig. 2 (A) Schematic illustration of the Alq3-DAAQ NWHJ based optical routers. (B) PL microscopy image of a single NWHJ. (C) PL image of the NWHJ in B excited with a 351 nm focused laser beam. (D) PL spectra of the excited spot and the output signals from the DAAQ branches and Alq3 tip. Inset shows the variation of the CIE coordinates with the propagation length. (E) The PL decay profiles of the 515 nm Alq3 emissions.could be modulated effectively.。