Superhydrophobic porous surfaces: Dissolved oxygen sensing

Yu Gao, Tao Chen, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Porous polymer films are necessary for dissolved gas sensor applications that combine high sensitivity with selectivity. This report describes a greatly enhanced dissolved oxygen sensor system consisting of amphiphilic acrylamide-based polymers: poly(N-(1H, 1H-pentadecafluorooctyl)-methacrylamide) (pC7F15MAA) and poly(N-dodecylacrylamide-co-5- [4-(2-methacryloyloxyethoxy-carbonyl)phenyl]-10,15,20-triphenylporphinato platinum(II)) (p(DDA/PtTPP)). The nanoparticle formation capability ensures both superhydrophobicity with a water contact angle greater than 160° and gas permeability so that molecular oxygen enters the film from water. The film was prepared by casting a mixed solution of pC7F15MAA and p(DDA/PtTPP) with AK-225 and acetic acid onto a solid substrate. The film has a porous structure comprising nanoparticle assemblies with diameters of several hundred nanometers. The film shows exceptional performance as the oxygen sensitivity reaches 126: the intensity ratio at two oxygen concentrations (I0/I40) respectively corresponding to dissolved oxygen concentration 0 and 40 (mg L-1). Understanding and controlling porous nanostructures are expected to provide opportunities for making selective penetration/separation of molecules occurring at the superhydrophobic surface.

Original languageEnglish
Pages (from-to)3468-3472
Number of pages5
JournalACS Applied Materials and Interfaces
Volume7
Issue number6
DOIs
Publication statusPublished - 2015 Feb 18

Keywords

  • amphiphilic
  • fluorinated polymer
  • nanoparticle
  • phosphorescence
  • porphyrin

ASJC Scopus subject areas

  • Materials Science(all)

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