Tapered Mach-Zehnder interferometer based on PbS quantum dots modified by polymers for copper ion sensing

Yuyang Yan, Meiduan Fan, Shuang Zhou, Xiaolan Sun, Longfei Ma, Ruoyu Li, Alan R. Kost

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)4807-4813
Number of pages7
JournalApplied optics
Volume60
Issue number16
DOIs
StatePublished - Jun 1 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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