Porosity-controllable magnetoplasmonic nanoparticles and their assembled arrays
- 30 March 2020
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 12 (15), 8453-8465
- https://doi.org/10.1039/d0nr01178a
Abstract
Control of the chemical and physical properties of nanoscale colloids and their nanoassemblies remains a challenging issue for enhancing the performance and functionalities of nanodevices. In this study, we report a post-synthesis etching method to tailor the porosity of the Fe3O4 shells coating on Ag NPs, establishing a facile but effective approach to regulate the chemical and optical properties of the colloids and their assembled structures. As the shell porosity increases, the NPs are transformed, producing enhanced catalytic activity and the surface-enhanced Raman spectroscopy (SERS) effect, which results from enhanced chemical diffusion into the Ag core. Magnetoplasmonic (MagPlas) one- (1D) and two- (2D) dimensional arrays fabricated using these porosity-controllable NPs exhibit intriguing plasmon properties that are strongly affected by the porosity of the particle shell. Furthermore, the bright coloration of the 2D arrays is tuned by changing the shell porosity or introducing an additional metallic layer. Such 1D and 2D porous MagPlas metastructures possessing Fe3O4 shells with tunable porosities are a fulcrum for developing recyclable catalysts and tunable optical filters with optimized activity, selectivity, and sensitivity, as well as color displays and sensing platforms.Funding Information
- National Research Foundation of Korea (NRF-2017R1A4A1015627, NRF-2017K1A3A1A30084348, NRF-2019R1A2C2007825, NRF- 2019R1I1A1A01064344)
- Ministry of Health and Welfare (HI17C1260)
- Pusan National University
This publication has 73 references indexed in Scilit:
- Tunable two types of Fano resonances in metal–dielectric core–shell nanoparticle clustersApplied Physics Letters, 2013
- Beyond the Hybridization Effects in Plasmonic Nanoclusters: Diffraction‐Induced Enhanced Absorption and ScatteringSmall, 2013
- Mesoporous iron oxide nanoparticles prepared by polyacrylic acid etching and their application in gene delivery to mesenchymal stem cellsMicroscopy Research and Technique, 2013
- Near- and Far-Field Effects on the Plasmon Coupling in Gold Nanoparticle ArraysThe Journal of Physical Chemistry C, 2012
- Ultrafine Magnetite Nanopowder: Synthesis, Characterization, and Preliminary Use as Filler of Polymethylmethacrylate NanocompositesJournal of Nanotechnology, 2012
- Metallo-dielectric core–shell nanospheres as building blocks for optical three-dimensional isotropic negative-index metamaterialsNew Journal of Physics, 2011
- Assembly of large-area, highly ordered, crack-free inverse opal filmsProceedings of the National Academy of Sciences of the United States of America, 2010
- Optical properties of two interacting gold nanoparticlesOptics Communications, 2003
- Magnetic nanoscale dots on colloid crystal surfacesApplied Physics Letters, 2000
- Borate interference in surface-enhanced Raman spectroscopy of aminesAnalytical Chemistry, 1991