Polyaniline-Doped Poly (Methyl Methacrylate) Microfiber for Methanol Sensing

• Published in: IEEE Sensors Journal
• Main Author: Isa N.M.; Irawati N.; Rahman H.A.; Yusoff M.H.M.; Harun S.W.
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers Inc. 2018
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041553562&doi=10.1109%2fJSEN.2018.2802440&partnerID=40&md5=93ec0d06128d7baa9300941906fe7cb2

The main objective of this paper is to investigate the effect of Polyaniline (PANI) as a dopant in the fabrication of a polymer microfiber for sensing methanol. A simple direct drawing technique was employed in the preparation of a Poly (methyl methacrylate) (PMMA) doped with PANI microfiber. The changes of the power spectrum were measured through an optical spectrum analyzer over a range of 100-500 ppm methanol solution concentrations. It was observed that the sensor utilizing a PANI-doped microfiber had a higher response toward the changes in the methanol solution concentrations compared with its undoped counterpart with an improvement of 41.01% and more than 5 times for the sensitivity and resolution, respectively. A sensitivity of 0.047 dBm/ppm was attained with the use of a PMMA microfiber with a taper diameter and length of 3μm and 3 mm, respectively. The field emission scanning electron microscopy proved the successful doping of PANI into the PMMA microfiber, which contributed to the increase in the performance of the sensor. © 2001-2012 IEEE.