A.A. Salim, S.K. Ghoshal, M.S. Amana, Nandang Mufti, M.S.A. Aziz, Safa Riyadh Waheed, Karrar Abdulameer Kadhim, N.H. Sarmin, H. Bakhtiar
Demand of high performance fiber-optic relative humidity sensors (FO-RHS) is ever-growing. Thus, rose Bengal dye (RBD)-functionalized ellipsoidal silver nanoparticles (AgNPs) were made using pulse laser ablation in liquid method and used as sensing coating elements to design optical fiber-based humidity sensors. These NPs showed prominent surface plasmon resonance absorption and fluorescence with short decay lifetime. AgNPs surface enriched of OH and COOH groups enabled an efficient H2O adsorption, O2 dissociation, and electrons acceptance. Humidity sensing capacity of these FO-RHS was tested against polyvinyl alcohol, revealing excellent sensitivity (0.16 dB/%RH) and linearity (0.955 dB/%RH). Proposed FO-RHS may be beneficial for practical applications. © 2024 Elsevier Inc.
Laser Center & Physics Department, Faculty of Science, CsNano, UTM, Johor, Malaysia; Department of Physics, College of Science, Wasit University, Iraq; Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang No. 5 Malang 65145, Indonesia; Computer Techniques Engineering Department, College of Technical Engineering, Islamic University, Najaf, Iraq; Computer Techniques Engineering Department, Faculty of Information Technology, Imam Ja'afar Al-Sadiq University, Baghdad, Iraq; Mathematical Department, Faculty of Science, UTM, Johor, Malaysia
