Single-walled carbon nanotubes coated D-shaped fiber for aqueous ethanol detection

Huda Adnan Zain, Malathy Batumalay, Hazli Rafis Abdul Rahim, Moh Yasin, Sulaiman Wadi Harun

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In this letter, single-walled carbon nanotubes (SWCNT) coating was used on the D-shaped silica fiber for ethanol sensing in aqueous solution. The performance of this structure as an ethanol sensor was studied here by monitoring output power variation and wavelength shift with changing ethanol concentration. In the concentration range of 5%–50% of ethanol, the SWCNT coated structure showed an improved sensitivity compared to the uncoated sample. The sensitivity is improved from 0.013 5 dB/% to 0.040 9 dB/% with the coating. The SWCNT coated sample also showed a peak wavelength shift of 0.1 nm with the change of ethanol concentration in the same range.

Original languageEnglish
Pages (from-to)430-433
Number of pages4
JournalOptoelectronics Letters
Issue number7
Publication statusPublished - Jul 2022


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