Anomalous fluorescence enhancement from double heterostructure 3D colloidal photonic crystals-A multifunctional fluorescence-based sensor platform

Eftekhari, E, Li, X, Kim, T, Gan, Z, Cole, I, Zhao, D, Kielpinski, D, Gu, M and Li, Q 2015, 'Anomalous fluorescence enhancement from double heterostructure 3D colloidal photonic crystals-A multifunctional fluorescence-based sensor platform', Scientific Reports, vol. 5, 14439, pp. 1-9.


Document type: Journal Article
Collection: Journal Articles

Title Anomalous fluorescence enhancement from double heterostructure 3D colloidal photonic crystals-A multifunctional fluorescence-based sensor platform
Author(s) Eftekhari, E
Li, X
Kim, T
Gan, Z
Cole, I
Zhao, D
Kielpinski, D
Gu, M
Li, Q
Year 2015
Journal name Scientific Reports
Volume number 5
Article Number 14439
Start page 1
End page 9
Total pages 9
Publisher Nature Publishing Group
Abstract Augmenting fluorescence intensity is of vital importance to the development of chemical and biochemical sensing, imaging and miniature light sources. Here we report an unprecedented fluorescence enhancement with a novel architecture of multilayer three-dimensional colloidal photonic crystals self-Assembled from polystyrene spheres. The new technique uses a double heterostructure, which comprises a top and a bottom layer with a periodicity overlapping the excitation wavelength (E) of the emitters, and a middle layer with a periodicity matching the fluorescence wavelength (F) and a thickness that supports constructive interference for the excitation wavelength. This E-F-E double heterostructure displays direction-dependent light trapping for both excitation and fluorescence, coupling the modes of photonic crystal with multiple-beam interference. The E-F-E double heterostructure renders an additional 5-fold enhancement to the extraordinary FL amplification of Rhodamine B in monolithic E CPhCs, and 4.3-fold acceleration of emission dynamics. Such a self-Assembled double heterostructue CPhCs may find significant applications in illumination, laser, chemical/biochemical sensing, and solar energy harvesting. We further demonstrate the multi-functionality of the E-F-E double heterostructure CPhCs in Hg (II) sensing.
Subject Biomedical Engineering not elsewhere classified
Keyword(s) spontaneous emission
quantum dots
opal
lifetime
defects
films
dye
DOI - identifier 10.1038/srep14439
Copyright notice This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
ISSN 2045-2322
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