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Proceedings Paper

Optical properties of mesogen-coated gold nanoparticles
Author(s): José Dintinger; Bai-Jia Tang; Xianbing Zeng; Tobias Kienzler; Georg H. Mehl; Goran Ungar; Carsten Rockstuhl; Toralf Scharf
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Paper Abstract

In this work, the physical and optical properties of gold nanoparticles functionalized with laterally grafted nematic ligands were studied. In particular, the influence of the nanoparticle size on the mesomorphic behavior and optical properties of the composite was investigated. To obtain an in-plane alignment of the mesogens, thin oriented films were prepared by shearing and characterized by polarized absorption spectroscopy. While the sub-2nm nanoparticle thin film only showed birefringence due to a strong damping of the plasmon resonance, larger NPs exhibit a strong dichroism with a shift of the NP plasmon resonance by about 50 nm. These results demonstrate the possibility to obtain a bulk NP metamaterial with tunable plasmonic properties by chemical engineering of the NP ligands.

Paper Details

Date Published: 16 February 2012
PDF: 6 pages
Proc. SPIE 8271, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling IX, 827106 (16 February 2012); doi: 10.1117/12.906999
Show Author Affiliations
José Dintinger, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Bai-Jia Tang, The Univ. of Hull (United Kingdom)
Xianbing Zeng, The Univ. of Sheffield (United Kingdom)
Tobias Kienzler, Friedrich-Schiller-Univ. Jena (Germany)
Georg H. Mehl, The Univ. of Hull (United Kingdom)
Goran Ungar, The Univ. of Sheffield (United Kingdom)
Carsten Rockstuhl, The Univ. of Sheffield (United Kingdom)
Toralf Scharf, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 8271:
Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling IX
Kurt G. Eyink; Frank Szmulowicz; Diana L. Huffaker, Editor(s)

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