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Ammonia gas-sensing characteristics of fluorescence-based poly(2-(acetoacetoxy)ethyl methacrylate) thin films

Authors He, Jing HKUST affiliated (currently or previously)
Zhang, Tong-Yi View this author's profile
Chen, Guohua View this author's profile
Issue Date 2012
Source Journal of colloid and interface science , v. 373, (1), 2012, p. 94-101
Summary Novel fluorescent poly(2-(acetoacetoxy)ethyl methacrylate)(PAAEMA) latexes have been synthesized by miniemulsion polymerization employing a polymeric costabilizer. Nanoscale aggregates of macromolecules bearing β-dicarbonyl are formed in the prepared latex particles. Ammonia and the β-dicarbonyl aggregates assemble a supramolecular complex, which exhibits strong visible fluorescence under UV light. The formation of the complex is confirmed by the characteristic absorption peak located at about 275. nm in UV-Vis spectra. The absorption spectrum has been found to be applicable for ammonia detection. Atomic Force Microscopy (AFM) studies of surface morphology reveal that gas-sensing properties of the PAAEMA thin films involve the reversible absorption and desorption of ammonia. PAAEMA thin films are sensitive to ammonia gas and have a short response time of 80. s when exposed to 54. ppm of ammonia gas concentration. © 2011 Elsevier Inc..
ISSN 0021-9797
Language English
Format Article
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