A5077550736- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Advanced Photonic Communication Systems
- Photonic Crystal and Fiber Optics
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Ferroelectric and Piezoelectric Materials
- Photonic and Optical Devices
- Acoustic Wave Resonator Technologies
- Microwave Dielectric Ceramics Synthesis
- Advanced biosensing and bioanalysis techniques
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Multiferroics and related materials
- Advanced Optical Network Technologies
- Gas Sensing Nanomaterials and Sensors
- Surface Roughness and Optical Measurements
- GaN-based semiconductor devices and materials
- Luminescence Properties of Advanced Materials
- Dielectric properties of ceramics
- Glass properties and applications
- Quantum Dots Synthesis And Properties
- Heat Transfer and Optimization
- Copper-based nanomaterials and applications
- Nanoparticles: synthesis and applications
Universiti Malaysia Perlis
2014-2023
Universiti Tun Abdul Razak
2021
University of Malaya
1998-2017
University of Kuala Lumpur
2004
Telekom Malaysia Berhad (Malaysia)
1999-2002
Abstract Hybrid gold nanostructures seeded into nanotextured zinc oxide (ZnO) nanoflowers (NFs) were created for novel biosensing applications. The selected ‘spotted NFs’ had a 30-nm-thick nanoparticle (AuNP) layer, chosen from range of AuNP thicknesses, sputtered onto the surface. generated nanohybrids, characterized by morphological, physical and structural analyses, uniformly AuNP-seeded ZnO NFs with an average length 2–3 μm. Selective capture molecular probes AuNPs was evidence specific...
The performance of sensing surfaces highly relies on nanostructures to enhance their sensitivity and specificity. Herein, nanostructured zinc oxide (ZnO) thin films various thicknesses were coated glass p-type silicon substrates using a sol-gel spin-coating technique. deposited characterized for morphological, structural, optoelectronic properties by high-resolution measurements. X-ray diffraction analyses revealed that the have c-axis orientation display peaks refer ZnO, which exhibits...
Human chorionic gonadotropin (hCG), a glycoprotein hormone secreted from the placenta, is key molecule that indicates pregnancy. Here, we have designed cost-effective, label-free, in situ point-of-care (POC) immunosensor to estimate hCG using cuneated 25 nm polysilicon nanogap electrode. A tiny chip with dimensions of 20.5 × 12.5 mm was fabricated conventional lithography and size expansion techniques. Furthermore, sensing surface functionalized by (3-aminopropyl)triethoxysilane...
An improvement of gain in the long-wavelength band (L-band) is observed by double passing forward amplified spontaneous emission and signal erbium-doped fiber (EDF) using a circulator, unlike conventional single pass amplification. A enhancement as high 11 dB obtained for 1570-nm with an input power -20 dBm at 98 mW pump power. However, noise figure penalty about 2 observed.
A gain-clamping technique for the long wavelength band (L-band) erbium-doped fiber amplifier (EDFA) is presented. It uses a single Bragg grating (FBG) on input side of (EDF) to inject portion backward conventional (C-band) amplified spontaneous emission (ASE) back into system. The use narrow-band (NB) FBG has shown better performance in clamped-gain level and noise figure compared broad-band FBG. gain NB set up clamped at 15.4 dB with variation less than 0.3 an power as high 0 dBm.
A new double-pass long wavelength band erbium-doped fiber amplifier with enhanced noise figure characteristics is demonstrated by adding a short length of forward pumped (EDF) in front amplifier. Compared the conventional amplifier, provides improvement about 0.8 to 6.0 dB over flat-gain region from 1568 1600 nm. Since optical circulator prevents amplified signal and backward spontaneous emission propagating into EDF, population inversion input part hardly affected intense lights, therefore,...
The creation of an appropriate thin film is important for the development novel sensing surfaces, which will ultimately enhance properties and output high-performance sensors. In this study, we have fabricated characterized zinc oxide (ZnO) films on silicon substrates, were hybridized with gold nanoparticles (AuNPs) to obtain ZnO-Aux (x = 10, 20, 30, 40 50 nm) hybrid structures different thicknesses. Nanoscale imaging by field emission scanning electron microscopy revealed increasing...
There has been increasing interest in the field of surface plasmon resonance sensing technology according to its advantages such as small amount samples re-quired, freedom electromagnetic interference and greater sensitivity. This research investigates using a thin layer dielectric material Barium Titanate (BaTio3) over Gold (Au) for enhancing sensitivity sensor-based phase interrogation technique. BaTio3 is adopted due excellent proper-ties high constant low loss. Numerical results have...
A high sensitivity pressure sensor design without a polymer transducer is demonstrated in this paper. The uses thin metal diaphragm as instead of polymer. tested to maximum 100 psi and has 0.0115 nm/psi, which matches the calculated 0.0127 nm/psi. provides accurate measurement shows good repeatability its readings. also at flow loop University Tulsa, match with readings loop.
Abstract An incredible amount of joss fly ash is produced from the burning Chinese holy paper; thus, an excellent method recycling waste to extract aluminosilicate nanocomposites explored. The present research aims introduce a novel recycle through simple and straightforward experimental procedure involving acidic alkaline treatments. synthesized nanocomposite was characterized justify its structural physiochemical characteristics. A morphological analysis performed with field-emission...
Abstract A new pressure sensor based on fiber Bragg gratings (FBG), is described with high‐pressure sensitivity. The configured by embedding the FBG in a polymer‐field aluminum casing an opening one side, which exposed to measurand. measured response 0.06 nm/psi that ∼2700 times higher than bare FBG. linearity of designed also shown be good at pressures below 50 psi. This has numerous potential applications area low‐pressure measurements. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol...
Gallium (III) oxide Ga2O3 is emerging in the field of wide bandgap semiconductor for various applications such as solar-blind photodetectors et al. because its bandgap. For this reason, optical properties by sol-gel method are analyzed. thin films prepared spin coating method. The annealing temperature to make α–Ga2O3 range 450°C-550°C, where after 550°C, β–Ga2O3 obtained reported reviewed works. Therefore, temperatures samples set at 500°C, 700°C and 900°C. X-ray diffraction performed...