• 文献标题:   Graphene coated silica microfiber for highly sensitive magnesium sensor
  • 文献类型:   Article
  • 作  者:   YASIN M, IRAWATI N, ISA NM, HARUN SW, AHMAD F
  • 作者关键词:   silica microfiber, magnesium sensor, microfiber sensor, fiber optic, graphene, carbon nanotube
  • 出版物名称:   SENSORS ACTUATORS APHYSICAL
  • ISSN:   0924-4247
  • 通讯作者地址:   Airlangga Univ
  • 被引频次:   5
  • DOI:   10.1016/j.sna.2018.02.021
  • 出版年:   2018

▎ 摘  要

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 mu m 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. (C) 2018 Elsevier B.V. All rights reserved.