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Type: Journal article
Title: Rational design of photonic dust from nanoporous anodic alumina films: a versatile photonic nanotool for visual sensing
Author: Chen, Y.
Santos, A.
Wang, Y.
Kumeria, T.
Ho, D.
Li, J.
Wang, C.
Losic, D.
Citation: Scientific Reports, 2015; 5(1):12893-1-12893-12
Publisher: Nature
Issue Date: 2015
ISSN: 2045-2322
Statement of
Yuting Chen, Abel Santos, Ye Wang, Tushar Kumeria, Daena Ho, Junsheng Li, Changhai Wang, Dusan Losic
Abstract: Herein, we present a systematic study on the development, optimisation and applicability of interferometrically coloured distributed Bragg reflectors based on nanoporous anodic alumina (NAA-DBRs) in the form of films and nanoporous microparticles as visual/colorimetric analytical tools. Firstly, we synthesise a complete palette of NAA-DBRs by galvanostatic pulse anodisation approach, in which the current density is altered in a periodic fashion in order to engineer the effective medium of the resulting photonic films in depth. NAA-DBR photonic films feature vivid colours that can be tuned across the UV-visible-NIR spectrum by structural engineering. Secondly, the effective medium of the resulting photonic films is assessed systematically by visual analysis and reflectometric interference spectroscopy (RIfS) in order to establish the most optimal nanoporous platforms to develop visual/colorimetric tools. Then, we demonstrate the applicability of NAA-DBR photonic films as a chemically selective sensing platform for visual detection of mercury(II) ions. Finally, we generate a new nanomaterial, so-called photonic dust, by breaking down NAA-DBRs films into nanoporous microparticles. The resulting microparticles (μP-NAA-DBRs) display vivid colours and are sensitive towards changes in their effective medium, opening new opportunities for developing advanced photonic nanotools for a broad range of applications.
Keywords: Optical sensors, Optoelectronic devices and components
Rights: 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
RMID: 0030032826
DOI: 10.1038/srep12893
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Appears in Collections:Chemical Engineering publications

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