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Nanoarchitectonics of highly dispersed polythiophene on paper for accurate quantitative detection of metal ions

RSC advances, 2024-02, Vol.14 (8), p.5159-5166 [Peer Reviewed Journal]

This journal is © The Royal Society of Chemistry. ;Copyright Royal Society of Chemistry 2024 ;This journal is © The Royal Society of Chemistry 2024 The Royal Society of Chemistry ;EISSN: 2046-2069 ;DOI: 10.1039/d3ra08429a ;PMID: 38332791

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  • Title:
    Nanoarchitectonics of highly dispersed polythiophene on paper for accurate quantitative detection of metal ions
  • Author: Sasaki, Yui ; Lyu, Xiaojun ; Kawashima, Takayuki ; Zhang, Yijing ; Ohshiro, Kohei ; Okabe, Kiyosumi ; Tsuchiya, Kazuhiko ; Minami, Tsuyoshi
  • Subjects: Chemical sensors ; Chemistry ; Chemoreceptors ; Cobalt ; Copper ; Dispersion ; Fluorescence ; Pattern analysis ; Pattern recognition ; Polythiophene ; Quenching ; Sensor arrays ; Smartphones ; Solid state ; Substrates
  • Is Part Of: RSC advances, 2024-02, Vol.14 (8), p.5159-5166
  • Description: -Conjugated polymers such as polythiophene provide intramolecular wire effects upon analyte capture, which contribute to sensitive detection in chemical sensing. However, inherent aggregation-induced quenching causes difficulty in fluorescent chemical sensing in the solid state. Herein, we propose a solid-state fluorescent chemosensor array device made of a paper substrate (PCSAD) for the qualitative and quantitative detection of metal ions. A polythiophene derivative modified by dipicolylamine moieties ( 1 poly ), which shows optical changes upon the addition of target metal ions ( i.e. , Cu 2+ , Cd 2+ , Ni 2+ , Co 2+ , Pb 2+ , Zn 2+ , and Hg 2+ ), was highly dispersed on the paper substrate using office apparatus. In this regard, morphological observation of the PCSAD after printing of 1 poly suggested the contribution of the fiber structures of the paper substrate to the homogeneous dispersion of 1 poly ink to suppress aggregation-induced quenching. The optical changes in the PCSAD upon the addition of metal ions was rapidly recorded using a smartphone, which was further applied to imaging analysis and pattern recognition techniques for high-throughput sensing. Indeed, the printed PCSAD embedded with 1 poly achieved the accurate detection of metal ions at ppm levels contained in river water. The limit of detection of the PCSAD-based sensing system using a smartphone (48 ppb for Cu 2+ ions) is comparable to that of a solution-based sensing system using a stationary spectrophotometer (16 ppb for Cu 2+ ions). Therefore, the methodology based on a combination of a paper-based sensor array and a -conjugated polymer will be a promising approach for solid-state fluorescent chemosensors. Paper fibers allow the high dispersion of a fluorescent polythiophene chemosensor for the suppression of aggregation-induced quenching, which is applied to the solid-state fluorescent quantitative sensing of metal ions using imaging analysis and pattern recognition techniques.
  • Publisher: England: Royal Society of Chemistry
  • Language: English
  • Identifier: EISSN: 2046-2069
    DOI: 10.1039/d3ra08429a
    PMID: 38332791
  • Source: PubMed Central
    DOAJ Directory of Open Access Journals
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