@article{24ec25f9c4044a78a71635cd62e71a0a,
title = "Graphene coated silica microfiber for highly sensitive magnesium sensor",
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.",
keywords = "Carbon nanotubes, Fiber optic, Graphene, Magnesium sensor, Microfiber sensor, Silica microfiber",
author = "M. Yasin and N. Irawati and Isa, {N. M.} and Harun, {S. W.} and F. Ahmad",
note = "Funding Information: This work is financially supported by the Airlangga University Research Grant (Grant No.: 569/UN3/2017 ). M. Yasin received his B. Sc. in 1990 at Airlangga University, and M.Sc. and Ph.D degrees from Gadjah Mada University in 1999 and 2010, respectively. Currently, he is an professor at the Faculty of Science and Technology, Airlangga University, Indonesia. His research interests include fiber optic sensors and fiber laser. Ninik Irawati received the B.E in Biomedical Engineering from Airlangga University of 2012 and M. Phil and Ph.D. degrees in Photonics Engineering from University of Malaya, Kuala Lumpur, Malaysia, in 2014 and 2017, respectively. Her current research interests include Micro-Nanofiber device, sensing application, and optical trapping. Sulaiman Wadi Harun received the B.E. degree in electrical and electronics system engineering from the Nagaoka University of Technology, Nagaoka, Japan, in 1996, and the M.Sc. and Ph.D. degrees in photonic technology from the University of Malaya, Kuala Lumpur, Malaysia, in 2001 and 2004, respectively. Since 2010, he has been a Full Professor with the Department of Electrical Engineering. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",
year = "2018",
month = apr,
day = "15",
doi = "10.1016/j.sna.2018.02.021",
language = "English",
volume = "273",
pages = "67--71",
journal = "Sensors and Actuators, A: Physical",
issn = "0924-4247",
publisher = "Elsevier",
}