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

Zhangliang Gui, Jinwen Qian, Mingjie Yin, Quanfu An, Bobo Gu, Aping Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

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 trand tf).
Original languageEnglish
Pages (from-to)7754-7760
Number of pages7
JournalJournal of Materials Chemistry
Volume20
Issue number36
DOIs
Publication statusPublished - 28 Sep 2010
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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