Cation coordination reactions on nanocrystals: surface/interface, doping control and advanced photocatalysis applications (Conference Presentation)

Optics + Photonics for Sustainable Energy Pub Date : 2016-11-03 DOI:10.1117/12.2237717

Jiatao Zhang

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Abstract

Abstract: Including the shape and size effect, the controllable doping, hetero-composite and surface/interface are the prerequisite of colloidal nanocrystals for exploring their optoelectronic properties, such as fluorescence, plasmon-exciton coupling, efficient electron/hole separation, and enhanced photocatalysis applications. By controlling soft acid-base coordination reactions between cation molecular complexes and colloidal nanocrystals, we showed that chemical thermodynamics could drive nanoscale monocrystalline growth of the semiconductor shell on metal nano-substrates and the substitutional heterovalent doping in semiconductor nanocrystals. We have demonstrated evolution of relative position of Au and II-VI semiconductor in Au-Semi from symmetric to asymmetric configuration, different phosphines initiated morphology engineering, oriented attachment of quantum dots into micrometer nanosheets with synergistic control of surface/interface and doing, which can further lead to fine tuning of plasmon-exciton coupling. Therefore, different hydrogen photocatalytic performance, Plasmon enhanced photocatalysis properties have been achieved further which lead to the fine tuning of plasmon-exciton coupling. Substitutional heterovalent doping here enables the tailoring of optical, electronic properties and photocatalysis applications of semiconductor nanocrystals because of electronic impurities (p-, n-type doping) control. References: (1) J. Gui, J. Zhang*, et al. Angew. Chem. Int. Ed. 2015, 54, 3683. (2) Q. Zhao, J. Zhang*, etc., Adv. Mater. 2014, 26, 1387. (3) J. Liu, Q. Zhao, S. G. Wang*, J. Zhang*, etc., Adv. Mater. 2015, 27，2753-2761. (4) H. Qian, J. Zhang*, etc., NPG Asia Mater. (2015) 7, e152. (5) M. Ji, M. Xu, etc., J. Zhang*, Adv. Mater. 2016, in proof. (6) S. Yu, J. T. Zhang, Y. Tang, M. Ouyang*, Nano Lett. 2015, 15, 6282-6288. (7) J. Zhang, Y. Tang, K. Lee and M. Ouyang*, Science 2010, 327, 1634. (8) J. Zhang, Y. Tang, K. Lee, M. Ouyang*, Nature 2010, 466, 91.

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纳米晶体上的阳离子配位反应:表面/界面、掺杂控制和先进光催化应用(会议报告)

摘要:包括形状和尺寸效应在内，可控掺杂、异质复合和表面/界面是胶体纳米晶体探索其光电特性的前提，如荧光、等离子体激子耦合、高效的电子/空穴分离以及增强的光催化应用。通过控制阳离子分子配合物与胶体纳米晶体之间的软酸碱配位反应，我们发现化学热力学可以驱动金属纳米衬底上半导体外壳的纳米单晶生长和半导体纳米晶体中的取代异价掺杂。我们已经证明了Au和II-VI半导体在Au- semi中的相对位置从对称到不对称的演变，不同磷化氢引发的形态工程，量子点在表面/界面的协同控制下定向附着到微米纳米片上，这可以进一步导致等离子体激子耦合的微调。因此，不同的氢光催化性能，进一步实现了等离子体激子增强的光催化性能，从而实现了等离子体激子耦合的微调。由于电子杂质(p-， n-型掺杂)的控制，取代异价掺杂使得半导体纳米晶体的光学，电子性质和光催化应用成为可能。参考文献:(1)桂军，张军*，等。Angew。化学。Int。编辑。2015,54,3683。(2)赵强，张军*，等，生物工程学报，2014,26,1387。(3)刘建军，赵琪，王树国*，张军*，等，高分子学报，2015,27,2753-2761。(4)钱红华，张军*，等。(2015) 7, e152。(5)纪敏，徐敏等，张军*，2016，在证明。(6)张金涛，于淑娟，唐勇，欧阳明*，中国机械工程，2015,33(6):662 - 668。(7)张杰，唐勇，李克明，欧阳明*，科学进展，2010,32(3):334 - 334。(8)张杰，唐勇，李克明，欧阳明*，自然科学学报，2010,46(6):991。

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Optics + Photonics for Sustainable Energy

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