Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 183, Issue -, Pages 446-453Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.03.124
Keywords
Fluorescent sensor; Magnetic nanoparticles; Logic gate; Zn2+; Hydrogen sulfide
Funding
- Fundamental Research Funds for the Central Universities [lzujbky-2012-68]
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A highly selective and sensitive method for recognition of Zn2+ and hydrogen sulfide (H2S) in aqueous solution has been developed by using a quinoline fluorescent sensor functionalized magnetic silica nanoparticles (R1). The chemosensor R1 shows excellent fluorescence sensitivity and selectivity toward Zn2+ and H2S in aqueous media, and displays off-on-off type fluorescence change with alternately adding Zn2+ and H2S to the media along with reversible association-dissociation of the complex. Furthermore, the magnetic nanocomposites can be easily separated from solutions by adding an external magnetic field. Finally, using Zn2+ and H2S as inputs and the fluorescence intensity as output, an INHIBIT logic gate can be constructed at the nanoscale level. (C) 2013 Elsevier B.V. All rights reserved.
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