Journal
ANALYTICAL METHODS
Volume 4, Issue 5, Pages 1292-1297Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ay05791c
Keywords
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Funding
- Natural Science Foundation of China [20876134, 50633030, 60607011, 90101024]
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A novel type of fiber-optic mercury ion (Hg2+) sensor was prepared by coating poly (N-ethyl-4-vinylpyridinium chloride) (P4VP center dot HCl) and poly (sodium-p-styrenesulfonate) (PSS) ultrathin film on the surface of a thin-core fiber modal interferometer (TCFMI) with layer-by-layer (LbL) electrostatic self-assembly method. The fabricated TCFMI Hg2+ sensor exhibits a high selectivity to Hg2+ and its detection limit and response time are 10(-9) Mand 30 s, respectively. The LbL electrostatic self-assembly process is monitored with a quartz crystal microbalance (QCM) and UV-vis spectroscopy for film growth. Atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM) were used to characterize the morphology of the ultrathin film. Both demonstrated nanoporous film, which is helpful in shortening the response time of the TCFMI Hg2+ sensor.
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