Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 6, Pages 3468-3472Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am509147h
Keywords
amphiphilic; fluorinated polymer; nanoparticle; porphyrin; phosphorescence
Funding
- Japanese Society for the Promotion of Science (JSPS) [24350112]
- Nano-Macro Materials, Devices and System Research Alliance (MEXT)
- Iketani Science and Technology Foundation
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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 degrees 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 (I-0/I-40) 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.
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