Dynamic Response of Tapered Optical Multimode Fiber Coated with Carbon Nanotubes for Ethanol Sensing Application

Sensors

Arafat Shabaneh¹  Saad Girei¹  Punitha Arasu¹  Mohd Mahdi¹  Suraya Rashid²  Suriati Paiman³  Mohd Yaacob¹ 

[1] Wireless and Photonics Network Research Centre, Engineering and Technology Complex, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; E-Mails:;Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia; E-Mail:;Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; E-Mail:

关键词: carbon nanotubes;    tapered optical fiber;    ethanol sensing;    reflectance;   

DOI  :  10.3390/s150510452

来源: mdpi

【 摘 要 】

Ethanol is a highly combustible chemical universally designed for biomedical applications. In this paper, optical sensing performance of tapered multimode fiber tip coated with carbon nanotube (CNT) thin film towards aqueous ethanol with different concentrations is investigated. The tapered optical multimode fiber tip is coated with CNT using drop-casting technique and is annealed at 70 °C to enhance the binding of the nanomaterial to the silica fiber tip. The optical fiber tip and the CNT sensing layer are micro-characterized using FESEM and Raman spectroscopy techniques. When the developed sensor was exposed to different concentrations of ethanol (5% to 80%), the sensor reflectance reduced proportionally. The developed sensors showed high sensitivity, repeatability and fast responses (<55 s) towards ethanol.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.