Department of Chemistry, University of Hull, Cottingham Road, Hull HU6 7RX, United Kingdom.
J Am Chem Soc. 2012 Mar 21;134(11):5076-9. doi: 10.1021/ja300492d. Epub 2012 Mar 7.
The use of the liquid-crystalline state to control the assembly of large (>5 nm) gold nanoparticles (NPs) is of considerable interest because of the promise of novel metamaterial properties of such systems. Here we report on a new approach for the preparation of large nematic gold NPs using a bifunctional capping agent that enables control over the particle size and serves as a linkage for subsequent functionalization with mesogenic groups. Properties of the NPs were characterized by HRTEM, NMR, DSC, TGA, UV/vis, OPM, and XRD studies. The results confirmed the formation of a stable nematic mesophase above 37.5 °C for NPs in the 6-11 nm size range.
利用液晶态来控制大尺寸（>5nm）金纳米粒子（NPs）的组装具有重要意义，因为这类体系有望展现出新颖的超材料性质。在此，我们报告了一种新方法，通过使用双官能团封端剂制备大向列型金 NPs，该方法可控制粒径并作为后续介晶基团功能化的连接物。通过 HRTEM、NMR、DSC、TGA、UV/vis、OPM 和 XRD 研究对 NPs 的性质进行了表征。结果证实，在 6-11nm 尺寸范围内的 NPs 中，在 37.5°C 以上形成了稳定的向列型介晶相。
