Manal Alhathal , A.A. Salim , Mahmood Alhajj , S. K. Ghoshal , Muhammad Safwan , Ganesan Krishnan , Sunita Sharma
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引用次数: 0
Abstract
The development of plasmonic metal nanocomposites-decorated high-performance optical fibre sensors (OFS) for oil/gas detection remains challenging. Thus, gold-titania nanocomposites (Au-TiO2NCs) were produced in deionized water (DIW) and ethanol (ET) using pulsed laser ablation in liquid (PLAL) method and characterized. Laser fluence (LF) was varied from 4.5 to 13.6 J/cm2 to tailor the surface morphology, structural, optical, and physiochemical properties of six series of specimens. Crystallinity and purity of these NPs and NCs (optimum specimen from each series) were verified by XRD and FTIR measurement. TEM and SAED analyses of the optimum NCs prepared in DIW and ET (made at LF of 9.1 J/cm2) revealed their spherical morphology with the corresponding mean diameter of 11.59 ± 3.02 nm and 6.69 ± 3.94 nm. The studied plasmonic NCs made in DIW and ET showed fluorescence lifetime decay of 2.9 µs and 3.1 µs, respectively. The EDX spectra and elemental mapping of the optimum NPs and NCs confirmed their atomic composition and uniform distribution. The freshly grown NPs and NCs were used as sensing elements to coat the optical fIber, realizing a spectrum of high-quality sensors for petroleum grade N95 detection. All the designed sensors (coated with NPs and NCs) exhibited excellent sensitivity and linearity performance when exposed to petroleum N95 at various concentrations. It was asserted that the proposed products can contribute to the advancement of sustainable, reliable and cost-effective plasmonic sensors needed for diverse practical applications.
期刊介绍:
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems