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Cihui Liu, Guizhi Gao, Yuqi Zhang, Libin Wang, Jingxia Wang and Yanlin Song The Naked-Eye Detection of NH3–HCl by Polyaniline-Infiltrated TiO2 Inverse Opal Photonic Crystals Macromolecular Rapid Communications 33

Article first published online: 30 JAN 2012 | DOI: 10.1002/marc.201100575

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A reversible color change of a polyaniline-infiltrated TiO2 inverse opal photonic crystal (PC) film can be obtained when the PC is switched from an NH3 to HCl vapor environment. The naked-eye detection of NH3 and HCl vapors can be realized by a reversible color change of the PC film, which is very important for chemical and biological sensors.

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