Yolk-shell型手性无机杂化纳米棒的制备以及光学信号调控

尽管人们已经制备出了各种各样的手性纳米材料（包括手性量子点、手性金银纳米材料等），但是强手性无机纳米材料的制备仍然是一大难点。本项目拟通过金纳米棒作为种子，筛选合适的有机配体，制备出具有强光学活性的Yolk/shell结构的纳米棒。通过改变金纳米棒的长径比，调控所制备的Yolk/shell结构的纳米棒等离子体光学活性，为其他手性无机纳米材料的合成提供实验参考。此外，本项目以具有强手性的Yolk/shell结构纳米棒作为核，在其表面生长一层手性半导体纳米壳，构建具有多级次手性的核壳型手性无机杂化纳米材料，通过实验与理论计算相结合，为研究多级次手性纳米材料提供理论和实验依据。

Although a variety of chiral nanomaterials have been prepared, including chiral quantum dots, chiral gold and silver nanomaterials, etc., the preparation of chiral inorganic nanomaterials with strong optical activity is still a major problem. In this project, it is proposed to use gold nanorods as seeds to prepare Yolk/shell nanorod (YSNR). Through the change of different chiral organic ligands, we want to obtain the YSNR which shows the intense circular dichroism response. By changing the aspect ratio of gold nanorods, the optical activity of YSNRs could be adjusted. And this will provide experimental reference for the synthesis of other chiral inorganic nanomaterials. In addition, the prepared YSNR was used as the core, and a layer of chiral semiconductor nanoshell was deposited on the surface of YSNR, then a core-shell chiral inorganic hybrid nanomaterial with hierarchical chirality was constructed. The experimental results and theoretical calculations will provide theoretical and experimental basis for the study of other chiral inorganic nanomaterials.