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Issue 36, 2010
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A novel fast response fiber-optic pH sensor based on nanoporous self-assembled multilayer films

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Abstract

Three-component multilayer films were prepared by consecutively depositing a polycation blend of poly(4-vinylpyridiniomethanecarboxylate) (PVPMC) and poly(diallyldimethylammonium) (PDDA) with poly(acrylic acid) (PAA). The self-assembly and disintegration behavior of the multilayer films were investigated in details by UV-vis absorption spectroscopy, quartz crystal microbalance (QCM) and atomic force microscopy (AFM). It was found that nanoporous PDDA/PAA multilayer films can be obtained conveniently by partly disintegrating (PVPMC + PDDA)/PAA multilayer films in a 0.15 M NaCl solution. A novel fast response fiber-optic pH sensor was successfully prepared by constructing nanoporous self-assembly multilayer films on the thin-core fiber interferometer (TCFMI) surface. The response time of a fiber-optic pH sensor deposited with nanoporous PDDA/PAA multilayer film (20 s rise time (tr) and 15 s fall time (tf)) was only one-tenth of that with the nonporous PDDA/PAA multilayer film (240 s and 160 s for tr and tf).

Graphical abstract: A novel fast response fiber-optic pH sensor based on nanoporous self-assembled multilayer films

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Supplementary files

Article information


Submitted
17 May 2010
Accepted
14 Jun 2010
First published
03 Aug 2010

J. Mater. Chem., 2010,20, 7754-7760
Article type
Paper

A novel fast response fiber-optic pH sensor based on nanoporous self-assembled multilayer films

Z. Gui, J. Qian, M. Yin, Q. An, B. Gu and A. Zhang, J. Mater. Chem., 2010, 20, 7754
DOI: 10.1039/C0JM01476A

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