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Type: Journal article
Title: Biomimetic nanoporous anodic alumina distributed Bragg reflectors in the form of films and microsized particles for sensing applications
Author: Chen, Y.
Santos, A.
Wang, Y.
Kumeria, T.
Li, J.
Wang, C.
Losic, D.
Citation: ACS Applied Materials and Interfaces, 2015; 7(35):19816-19824
Publisher: American Chemical Society
Issue Date: 2015
ISSN: 1944-8244
Statement of
Yuting Chen, Abel Santos, Ye Wang, Tushar Kumeria, Junsheng Li, Changhai Wang and Dusan Losic
Abstract: In this study, we produce for the first time biomimetic films and microsized particles based on nanoporous anodic alumina distributed Bragg reflectors (NAA-DBRs) by a rational galvanostatic pulse-anodization approach. These biomimetic photonic structures can feature a broad range of vivid bright colors, which can be tuned across the UV−visible spectrum by engineering their nanoporous structure through different anodization parameters. The effective medium of NAA-DBRs films is systematically assessed as a function of the anodization period, the anodization temperature, and the current density ratio by reflectometric interference spectroscopy (RIfS). This analysis makes it possible to establish the most sensitive structure toward changes in its effective medium. Subsequently, specific detection of vitamin C molecules is demonstrated. The obtained results reveal that NAA-DBRs with optimized structure can achieve a low limit of detection for vitamin C molecules as low as 20 nM, a sensitivity of 227 ± 4 nmμM−1, and a linearity of 0.9985. Finally, as proof of concept, we developed a new photonic nanomaterial based on NAA-DBR microsized particles, which could provide new opportunities to produce microsized photonic analytical tools.
Keywords: Pulse anodization; structural engineering; nanoporous anodic alumina; biomimetic photonic coatings; reflectometric interference spectroscopy
Rights: © 2015 American Chemical Society
DOI: 10.1021/acsami.5b05904
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