Title |
Anomalous Fluorescence Enhancement from Double Heterostructure 3D Colloidal Photonic Crystals–A Multifunctional Fluorescence-Based Sensor Platform
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Published in |
Scientific Reports, September 2015
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DOI | 10.1038/srep14439 |
Pubmed ID | |
Authors |
Ehsan Eftekhari, Xiang Li, Tak H. Kim, Zongsong Gan, Ivan S. Cole, Dongyuan Zhao, Dave Kielpinski, Min Gu, Qin Li |
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. |
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Geographical breakdown
Country | Count | As % |
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Unknown | 38 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 11 | 29% |
Researcher | 6 | 16% |
Student > Master | 4 | 11% |
Student > Doctoral Student | 3 | 8% |
Professor | 3 | 8% |
Other | 3 | 8% |
Unknown | 8 | 21% |
Readers by discipline | Count | As % |
---|---|---|
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Engineering | 7 | 18% |
Materials Science | 7 | 18% |
Physics and Astronomy | 4 | 11% |
Biochemistry, Genetics and Molecular Biology | 2 | 5% |
Other | 2 | 5% |
Unknown | 9 | 24% |