Tapered optical fiber coated with graphene based nanomaterials for measurement of ethanol concentrations in water
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Tapered optical fibers coated with graphene and graphene oxide (GO) as the active layer for ethanol sensing were reported. The multimode optical fiber with 125 µm diameter was tapered to 40 µm diameter to enhance the sensitivity. Graphene and GO thin films were characterized using a scanning electron microscopy, Raman spectroscopy and ultraviolet–visible (UV–Vis) spectroscopy. The absorbance properties of the developed sensors increased when exposed to ethanol due to the change of light in the evanescent field. The sensing results indicated that the GO-coated sensor showed better performance with absorbance change of 80 % towards ethanol concentration of 5 % when compared to graphene-coated sensor with 40 % absorbance change towards ethanol with similar concentrations. The reliable response of the graphene and GO-coated on tapered fibers for detecting ethanol concentrations was achieved at room temperature.
KeywordsGraphene Optical fiber sensor Absorbance Ethanol sensor Tapered optical fiber
The authors would like to acknowledge Universiti Putra Malaysia for the project fund under Research University Grant Scheme (RUGS) No. 05-02-12-2015RU and 05-02-12-1882RU.
- 14.Girei, S., Shabaneh, A.: Tapered multimode fiber sensor for ethanol sensing application. In: IEEE 4th International conference on photonics. Malecca, Malysia., p. 275–277 (2013)Google Scholar
- 16.Yang, D., Velamakanni, A., Bozoklu, G., Park, S., Stoller, M., Piner, R.D., Stankovich, S., Jung, I., Field, D.A., Ventrice, C.A., et al.: Chemical analysis of graphene oxide films after heat and chemical treatments by X-ray photoelectron and Micro-Raman spectroscopy. Carbon 47(1), 145–152 (2009)CrossRefGoogle Scholar