1. Design, Synthesis, and Characterization of Mesogenic Amine-Capped Nematic Gold Nanoparticles with Surface-Enhanced Plasmonic Resonances
- Author
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Christopher P. J. Schubert, Christopher J. Welch, Georg H. Mehl, Bai J. Tang, M. Gabriela Tamba, and Chih H. Yu
- Subjects
Surface Properties ,Metal Nanoparticles ,Physics::Optics ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,Colloid and Surface Chemistry ,Liquid crystal ,Amines ,Particle Size ,Plasmon ,Molecular Structure ,Chemistry ,Mesogen ,Metamaterial ,Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing) ,General Chemistry ,Surface Plasmon Resonance ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Characterization (materials science) ,Condensed Matter::Soft Condensed Matter ,Design synthesis ,Colloidal gold ,Amine gas treating ,Gold ,0210 nano-technology - Abstract
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.
- Published
- 2012
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