Optical properties of mesogen-coated gold nanoparticles
Dintinger, Jose; Tang, Bai-Jia; Zeng, Xianbing; Kienzler, Tobias; Mehl, Georg H.; Ungar, Goran; Rockstuhl, Carsten; Scharf, Toralf
2012

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.

Details

Title Optical properties of mesogen-coated gold nanoparticles
Author(s) Dintinger, Jose ; Tang, Bai-Jia ; Zeng, Xianbing ; Kienzler, Tobias ; Mehl, Georg H. ; Ungar, Goran ; Rockstuhl, Carsten ; Scharf, Toralf
Published in Quantum Dots And Nanostructures: Synthesis, Characterization, And Modeling Ix
Series Proceedings of SPIE, 8271
Pages 827106
Conference Conference on Quantum Dots and Nanostructures - Synthesis, Characterization, and Modeling IX, San Francisco, CA, Jan 24-25, 2012
Date 2012
Publisher Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa
ISBN 978-0-8194-8914-2
Keywords
DOI https://doi.org/10.1117/12.906999
Other identifier(s) View record in Web of Science
Laboratories OPT
Record Appears in Scientific production and competences > STI - School of Engineering > STI Archives > OPT - Optics and Photonics Technology Laboratory
Conference Papers
Work produced at EPFL
Published
Record creation date 2012-05-11

Actions