Optical Fiber Biosensor toward E-coli Bacterial Detection on the Pollutant Water

Hoorieh Fallah, Tannaz Asadishad, Gholam M. Parsanasab, Sulaiman Wadi Harun, Waleed S. Mohammed, Moh Yasin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this study, Zinc oxide (ZnO) nanorods based fiber optic biosensor has been reported for rapid and sensitive detection of Escherichia Coli (E-coli). A thin layer of Gold nanoparticles (Au) (around 50 nm) is coated on the tip of a multimode plastic optical fiber. ZnO Nanorods are grown on Au layer thorough hydrothermal technique. This sensor showed a very fast response within the first 10 second of contacting the present of polluted water with E-coli Different concentrations of E. coli from (1000 to 4000 CFU/ml) have been tested and a sharp trend of sensitivity was observed. This sensing platform shows promising potential for regular water and food quality monitoring of various pathogenic microorganisms.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalEngineering Journal
Issue number12
Publication statusPublished - 2021


  • E. coli bacteria
  • Fiber optic biosensor
  • Gold(Au) nano layer
  • ZnO nanorods


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