Design, Synthesis, and Characterization of Mesogenic Amine-Capped Nematic Gold Nanoparticles with Surface-Enhanced Plasmonic Resonances

作者：Yu Chih H; Schubert Christopher P J; Welch Chris; Tang Bai J; Tamba M Gabriela; Mehl Georg H^*

来源：Journal of the American Chemical Society, 2012, 134(11): 5076-5079.

DOI：10.1021/ja300492d

The use of the liquid-crystalline state to control the assembly of large (%26gt;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 degrees C for NPs in the 6-11 nm size range.

• 出版日期2012-3-21