Multi-walled carbon nanotubes doped Poly(Methyl MethAcrylate) microfiber for relative humidity sensing

• Main Authors: Isa, Naimah Mat, Irawati, Ninik, Harun, Sulaiman Wadi, Ahmad, Fauzan, Rahman, Husna Abdul, Yusoff, Mohd Hanapiah Mohd
• Format: Article
• Published: Elsevier 2018
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/21807/; https://doi.org/10.1016/j.sna.2018.01.049
• Institution: Universiti Malaya

Multi-walled carbon nanotubes (MWCNTs) doped Poly(Methyl MethAcrylate) (PMMA) microfiber was proposed and demonstrated for relative humidity sensing. It was prepared through a direct drawing technique to achieve a diameter of 5 μm and a length of 5 mm. As the relative humidity increases from 45% to 80%, the output power of the sensor decreases linearly with a sensitivity of 0.3341 dBm/% and a resolution of 1.649%. The result signifies that PMMA doped with MWCNTs exhibits better sensitivity and higher resolution compared to the un-doped PMMA microfiber sensor. In addition, the sensor exhibits high reliability as well good repeatability.