Yasin, Moh and Irawati, Ninik and Isa, Naimah Mat and Harun, Sulaiman Wadi and Ahmad, Fauzan (2018) Graphene coated silica microfiber for highly sensitive magnesium sensor. Sensors and Actuators A: Physical, 273. pp. 67-71. ISSN 0924-4247, DOI https://doi.org/10.1016/j.sna.2018.02.021.
Full text not available from this repository.Abstract
A high sensitivity and simple magnesium sensor based on an silica optical microfiber coated with graphene for the detection of different concentrations of magnesium in de-ionized water is developed and demonstrated. The silica microfiber probe is fabricated by flame brushing technique and it has a waist diameter of 6 μm with tapering length of 3 cm. The microfiber is coated with graphene, which functions as a sensing layer using drop coating method. It is observed that the output power from the probe decreases as the magnesium concentration increases. Without the graphene coating, the sensor has a sensitivity of 12.1 dB/% with slope linearity of more than 98.31% and resolution of 0.0102%. However, the sensitivity of the sensor is significantly improved to 19.63 dBm/% with better slope linearity of 99.25% and resolution of 0.0038% as the graphene is coated onto the silica microfiber probe. The resonant peak also shifts to a longer wavelength as the concentration of magnesium solution increased.
| Item Type: | Article |
|---|---|
| Funders: | Airlangga University Research Grant (Grant No.: 569/UN3/2017) |
| Uncontrolled Keywords: | Silica microfiber; Magnesium sensor; Microfiber sensor; Fiber optic; Graphene; Carbon nanotubes |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 14 Feb 2019 03:48 |
| Last Modified: | 14 Feb 2019 03:48 |
| URI: | http://eprints.um.edu.my/id/eprint/20303 |
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