Blue-Emitting Self-Assembled Polymer Electrolytes for Fast, Sensitive, Label-Free Detection of Cu(II) Ions in Aqueous Media
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SCOPUS
- Title
- Blue-Emitting Self-Assembled Polymer Electrolytes for Fast, Sensitive, Label-Free Detection of Cu(II) Ions in Aqueous Media
- Authors
- Hyungmin Ahn; Sungyeon Kim; Onnuri Kim; Ilyoung Choi; Chang-Hoon Lee; Shim, JH; Park, MJ
- Date Issued
- 2013-07
- Publisher
- ACS
- Abstract
- We have developed a light-emitting material based on nonconjugated block copolymers that contain polystyrene . sulfonate (PSS) chains. The confinement of the MS chains within nanosized domains appeared to be a powerful means of achieving enhanced fluorescence signals. High fluorescence quantum yield, with a maximum value of 37%, was obtained by adjusting the types of self-assembled morphologies of PSS-containing block copolymers; in contrast, the fluorescence quantum yield was merely 5% for the PSS homopolymer lacking organization. The wavelength of fluorescence emission was tunable by rational molecular design. In addition, significant self-quenching behavior was not noticed in diverse forms of this material such as solutions, thin films, and free-standing membranes. Notably, the light-emitting self-assembled block copolymer electrolytes exhibited high sensitivity toward Cu2+ ions, with a detection limit of parts per billion levels, rapid response time of <= 1 min, and insignificant interference of other competitive metal ions.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15226
- DOI
- 10.1021/NN402037X
- ISSN
- 1936-0851
- Article Type
- Article
- Citation
- ACS NANO, vol. 7, no. 7, page. 6162 - 6169, 2013-07
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