An optical fiber interferometer coated with PbS quantum dots (QDs) was developed for copper ion (Cu2+) detection. The QDs were modified by a multifunctional copolymer that enabled QD surface ligation, dispersion, and coordination withCu2+.Cu2+ coordination with the polymer induced changes in the surrounding refractive index of the interferometer. The sensor was highly selective for Cu2+ and showed a linear detection range of 0-1000 μM with a limit of detection of 2.20μ Min both aqueous and biological solutions.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering