Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp4024298
Title: In situ "doping" inverse silica opals with size-controllable gold nanoparticles for refractive index sensing
Authors: Cai, Z.
Liu, Y.J.
Lu, X. 
Teng, J.
Issue Date: 9-May-2013
Citation: Cai, Z., Liu, Y.J., Lu, X., Teng, J. (2013-05-09). In situ "doping" inverse silica opals with size-controllable gold nanoparticles for refractive index sensing. Journal of Physical Chemistry C 117 (18) : 9440-9445. ScholarBank@NUS Repository. https://doi.org/10.1021/jp4024298
Abstract: We report the fabrication of inverse SiO2 opals "doped" with gold (i-Au-SiO2-o) nanoparticles (NPs) via a co-self-assembly method combined with subsequent removal of polystyrene colloidal spheres by calcination. The resulting i-Au-SiO2-o films demonstrate long-range ordering with uniform distribution of ligand-free Au NPs. The size of Au NPs can be tuned from 6 to 30 nm by varying the calcination temperature. The as-prepared i-Au-SiO2-o films preserve both localized surface plasmon resonance (LSPR) and Bragg diffraction peaks simultaneously. Both LSPR and Bragg diffraction peaks are sensitive to the refractive index changes of the surrounding medium - an important feature for sensing applications. The method provides a facile and versatile way to fabricate high-quality Au NP "doped" photonic crystals for applications in sensing and others. © 2013 American Chemical Society.
Source Title: Journal of Physical Chemistry C
URI: http://scholarbank.nus.edu.sg/handle/10635/89198
ISSN: 19327447
DOI: 10.1021/jp4024298
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