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Title: Label-Free Vapor Selectivity in Poly(p-Phenylene Oxide) Photonic Crystal Sensors
Authors: Lova, Paola
Bastianini, Chiara
Giusto, Paolo
Patrini, Maddalena
Rizzo, Paola
Guerra, Gaetano
Iodice, Mario
Soci, Cesare
Comoretto, Davide
Keywords: Colorimetric sensor
Label-free selectivity
Issue Date: 2016
Source: Lova, P., Bastianini, C., Giusto, P., Patrini, M., Rizzo, P., Guerra, G., et al. (2016). Label-Free Vapor Selectivity in Poly(p-Phenylene Oxide) Photonic Crystal Sensors. ACS Applied Materials and Interfaces, 8(46), 31941-31950.
Series/Report no.: ACS Applied Materials and Interfaces
Abstract: The lack of sensors for low cost, extensive, and continuous detection of vapor pollutants is a serious concern for health and safety in industrialized urban areas. Colorimetric sensors, such as distributed Bragg reflectors made of polymers, could achieve this task thanks to their low cost and easy signal transduction but are typically affected by low vapor permeability and lack of selectivity without chemical labeling. Here we demonstrate all-polymer Bragg multilayers for label-free selective detection of organic volatile compounds. The system exploits the ability of amorphous poly(p-phenylene oxide), PPO, to uptake large amount of guest molecules and to form cocrystalline phases with distinct optical properties. Bragg stacks embedding PPO active layers show selective colorimetric response to vapors of carbon tetrachloride and aromatic homologues, which can be revealed by the naked eye.
Description: 10 p.
ISSN: 1944-8244
DOI: 10.1021/acsami.6b10809
Rights: © 2016. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Journal Articles

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