A5087842789- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Advanced biosensing and bioanalysis techniques
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Carbon and Quantum Dots Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Fiber Optic Sensors
- Water Quality Monitoring and Analysis
- Advanced Nanomaterials in Catalysis
- Advanced Chemical Sensor Technologies
- Gas Sensing Nanomaterials and Sensors
- Water Quality Monitoring Technologies
- Molecular Sensors and Ion Detection
- Strong Light-Matter Interactions
- Conducting polymers and applications
- Spectroscopy and Chemometric Analyses
- Molecular Junctions and Nanostructures
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Analytical chemistry methods development
- Dendrimers and Hyperbranched Polymers
- Polydiacetylene-based materials and applications
- Smart Agriculture and AI
- Neural Networks and Reservoir Computing
National University of Malaysia
2018-2025
Universiti Putra Malaysia
2014-2015
Palm oil quality and price is dependent on the free fatty acids (FFA) content in palm oil. High of affect leads to various health environmental issues. The maximum set by Oil Refiners Association Malaysia crude 5 % < 0.1 refined bleached deodorized Due high demand industry market nowadays, works has been done improve including determination reduction traditional method for through titration sample against potassium hydroxide hot 2-propanol solutions using phenolphthalein as indicator....
Hyperbolic metamaterials (HMMs) have attracted increasing attentions because of their unique dispersion properties and the flexibility to control by changing components fractions composed materials. In this work, for first time, we demonstrate a plasmonic sensor based on side-polished few-mode-fiber coated with layered HMM, which is alternating layers Ag TiO2. To optimize performance, effects metal filling fraction (ρ) number bilayers (Nbi) HMM are thoroughly engineered effective medium...
Polyurethane-graphene (PU-graphene) nanocomposite was utilized as the sensing material for a fiber Bragg grating (FBG) temperature sensor. The characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and electrochemical impedance (EIS) to study morphology physical properties of materials FBG application. physical, chemical, conductivity PU-graphene improve after graphene introduced in pristine PU. FTIR shows...
Herein we propose a novel strategy to enhance surface plasmon resonance (SPR) by introducing photonic cavity into total-internal-reflection architecture. The cavity, which is comprised of highly reflective crystal (PC), defect layers, and gold (Au) film, enables Fabry–Perot (FP) resonances in the layers therefore narrows SPR width metallic as well increases electric field intensity penetration depth evanescent region. fabricated sensor exhibits 5.7-fold increase figure merit higher linear...
The detection of Pb(II) ions in a river using the surface plasmon resonance (SPR)-based silver (Ag) thin film technique was successfully developed. Chitosan-graphene oxide (CS-GO) coated on top Ag and acted as active sensing layer for ion detection. CS-GO synthesized characterized, physicochemical properties this material were studied prior to integration with SPR. In X-ray photoelectron spectroscopy (XPS), appearance C=O, C-O, O-H functional groups at 531.2 eV 532.5 eV, respectively,...
This research demonstrates a one-step modification process of biopolymer carrageenan active sites through functional group substitution in κ-carrageenan structures. The improves the electronegative properties derivatives, leading to enhancement material’s performance. Synthesized succinyl with high degree provides more for interaction analytes. FTIR analysis showed presence new peaks at 1068 cm−1, 1218 and 1626 cm−1 that corresponded vibrations C–O C=O from carbonyl group. A peak 2.86 ppm 1H...
An optical sensor-based localized surface plasmon resonance (LSPR) sensor was demonstrated for sensitive and selective chlorophyll detection through the integration of amino-functionalized carbon quantum dots (NCQD) triangle silver nanoparticles (AgNPs). The additions amino groups to CQD enhance electrostatic interactions. AgNPs-NCQD composite fabricated on silanized glass slide using self-assembly technique. experimental results showed that film-based LSPR detects better than AgNPs...
The discovery of hybrid states in strong coupling interaction has gained growing attention cavity-quantum electrodynamics research owing to its fundamental directives and potential advanced optical applications. ultra-confined mode volume plasmonic cavity gold nanorods (AuNRs), particularly at the nanorod tip "hotspot" provides a large strength, prerequisite for coherent energy exchange regime. Here, we reported remarkable Rabi splitting ∼231 meV between longitudinal localized surface...
In this paper, a comprehensive study has been made on the detection of free fatty acids (FFAs) in palm oil via an optical technique based enzymatic aminolysis reactions. FFAs crude (CPO) were converted into hydroxamic (FHAs) biphasic lipid/aqueous medium presence immobilized lipase. The colored compound formed after complexation between FHA and vanadium (V) ion solution was proportional to FFA content CPO samples analyzed using spectrophotometric method. order develop rapid system,...
This paper experimentally demonstrates the feasibility of improving sensing performance fiber Bragg grating (FBG)-based point sensors by deploying two pulse coding techniques, simplex (SSC), and Golay complementary codes (GCC). The techniques are separately combined with conventional time-domain multiplexed FBG (TDM-FBG) interrogation sensor, their results compared respect to single technique. Consistently theory, for both we have confirmed that signal-to-noise ratio improved proportionally...
A label-free detection for dissolved carbon dioxide (dCO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) is developed using a tapered optical fiber sensor. The region of the coated with zinc oxide (ZnO) nanorice and used as probe dCO sensing. sensor was exposed to different concentrations solution ranging from 10 100 ppm. ZnO can adsorb via strong hydrogen bonding due presence plenty oxygen atoms on its surface layer. interaction...