Plasmon-active optical fiber functionalized by metal organic framework for pesticide detection

E. Miliutina, O. Guselnikova, V. Burtsev, R. Elashnikov, P. Postnikov, V. Svorcik, O. Lyutakov

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Functional plasmonic fiber for detection and on-line monitoring of organophosphorus pesticides in water or model soil samples is described. The appearance of the plasmon absorption band was realized through the deposition of a thin gold layer on the naked core of multimode optical fiber. The metalorganic frameworks (MOF-5) layer was deposited on the gold surface for the introduction of a high affinity towards the target pesticides. The MOF-5 layer affords the extraction of pesticides and their concentration primarily in the “plasmon evanescent wave” space, allowing the detection by the shift of plasmon absorption band. The growth of MOF-5 layer was confirmed using the Raman, XPS and XRD measurements. The entrapping of pesticides was checked using the Raman spectroscopy and ellipsometry, which also indicate the corresponding changes of MOF-5 refractive index. The series of further experiments demonstrate the applicability of proposed fiber sensor for detection of pesticides in soil without the false signals from surrounding media. The main advantages of proposed sensor can be attributed to simplicity, high sensitivity, low cost and the absence of organic solvents for the probe treatment.

Original languageEnglish
Article number120480
JournalTalanta
DOIs
Publication statusAccepted/In press - 2019

Keywords

  • Metal–organic frameworks
  • Optical fiber
  • Organophosphorus pesticides detection
  • Sensor
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Plasmon-active optical fiber functionalized by metal organic framework for pesticide detection'. Together they form a unique fingerprint.

Cite this