Preparation and optical properties of silver chalcogenide coated gold nanorods
- 20 July 2006
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 16 (40), 3942-3945
- https://doi.org/10.1039/b607106f
Abstract
A homogeneous layer of silver sulfide or selenide was coated onto gold nanorods in aqueous solution by exposing Au/Ag core/shell nanorods to S2− or Se2− in an oxidizing environment. The formation of the silver chalcogenide layers was confirmed by transmission electron microscopy (TEM) and selective area electron diffraction (SAED). The longitudinal plasmon resonance of the gold nanorods shifted to the red and was attenuated. The experimental spectra agree well with a simulation based on confocal ellipsoids in the quasi-static limit. The synthetic procedure was also employed to coat silver sulfide or selenide onto gold bipyramids. A red-shift of the longitudinal plasmon resonance was also seen, although the coating was not as homogeneous. These novel composite materials may present interesting nonlinear optical properties.Keywords
This publication has 21 references indexed in Scilit:
- Ultrafast resonant optical scattering from single gold nanorods: Large nonlinearities and plasmon saturationPhysical Review B, 2006
- A General Approach to Binary and Ternary Hybrid NanocrystalsNano Letters, 2006
- Photonic Crystals with Thermally Switchable Stop Bands Fabricated from Se@Ag2Se Spherical ColloidsAngewandte Chemie International Edition, 2005
- Vibrational Response of Nanorods to Ultrafast Laser Induced Heating: Theoretical and Experimental AnalysisJournal of the American Chemical Society, 2003
- Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth MethodChemistry of Materials, 2003
- Preparation of Polystyrene- and Silica-Coated Gold Nanorods and Their Use as Templates for the Synthesis of Hollow NanotubesNano Letters, 2001
- Ultrafast Electron Dynamics and Optical Nonlinearities in Metal NanoparticlesThe Journal of Physical Chemistry B, 2001
- Spectral Properties and Relaxation Dynamics of Surface Plasmon Electronic Oscillations in Gold and Silver Nanodots and NanorodsThe Journal of Physical Chemistry B, 1999
- Optical bistability of small heterogeneous clustersThe Journal of Chemical Physics, 1996
- Beiträge zur Optik trüber Medien, speziell kolloidaler MetallösungenAnnalen der Physik, 1908