A5103005905- Plasma Diagnostics and Applications
- Laser-induced spectroscopy and plasma
- Multiferroics and related materials
- Laser-Plasma Interactions and Diagnostics
- Magnetic and transport properties of perovskites and related materials
- Ferroelectric and Piezoelectric Materials
- Plasma Applications and Diagnostics
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Ion-surface interactions and analysis
- Semiconductor Lasers and Optical Devices
- 2D Materials and Applications
- Gas Dynamics and Kinetic Theory
- Analytical chemistry methods development
- Magnetic confinement fusion research
- Advanced Condensed Matter Physics
- Metal and Thin Film Mechanics
- Atomic and Molecular Physics
- Laser Material Processing Techniques
- Semiconductor Quantum Structures and Devices
- Aerosol Filtration and Electrostatic Precipitation
- GaN-based semiconductor devices and materials
- ZnO doping and properties
- Nanowire Synthesis and Applications
- Ga2O3 and related materials
University of Technology Malaysia
2011-2023
Malaysia University of Science and Technology
2022-2023
In this work, the design and construction of a 50 Ω fast Faraday cup its results in correlation with Lee Model Code for ion beam time flight measurements Deuterium filled plasma focus device are presented. Fast properties such as flux, fluence, speed, energy at 2–8 Torr studied. The minimum 34 ns full width half maximum signal 12 kV, 3 INTI PF was captured by cup. 67 ± 5 keV 4 detected Ion show consistent especially near to optimum pressures.
Self-absorption (SA) can drastically affect the emission signal which makes quantitative and, in extreme cases, qualitative investigations very challenging laser induced plasma spectroscopy. In this study, parameters are spectroscopically studied and SA aluminum lines is investigated at various energies gate delays. Q-switched Nd:YAG installed on LIBS2500plus system (1064 nm, 6 ns, 10 Hz) was used for ablation. The sample ablated air with different between 5 650 mJ, spectra were recorded...
Abstract In this paper, the effect of Nd:YAG laser wavelength and energy on synthesis gold nanoparticles is reported. Gold colloidal solutions were prepared by pulsed ablation target in deionized water. The with repetition rate 1 Hz was assigned to supply at fundamental second harmonic wavelengths i.e., 1064 nm 532 nm, respectively. Synthesized characterized using particle size analyzer (PSA). Four different energies used ablate samples synthesize nanoparticles. average found decrease...
The effect of self absorption becomes significant when plasma is dense enough to behave as optically thick. It essential account for the self-absorption in that case. variation radial trajectory investigated this paper. In order analyze line radiation argon by observing influence pressure gas. On comparison results numerical experiment considering both aspects i.e. including and excluding term Lee code an obvious deviation between trajectories observed. Last few fractions seconds (200-300...
Abstract The present study designates the photocatalytic degradation efficiency of RhB dye using cerium-cobalt co-doped BiFeO 3 nanoparticles. Nanoparticles Ce 0.1 Co x Bi 1-x Fe 2 O (0 ≤ 0.2) have been facilely synthesized via sol-gel auto-combustion method. FESEM analysis revealed irregular-shaped nanoparticles with agglomerated coalescence behaviour and element composition in was confirmed EDX. crystallite size can be calculated around 64 nm to 71 for pure range 41 60 XRD diffraction...
In this paper, an all-optical switch based on self-assembled GaAs/AlAs quantum dots (QDs) within a vertical cavity is designed and proposed. Two essential aspects of novel device have been investigated, which include the QD/cavity nonlinearity with appropriately mirrors intersubband carrier dynamics inside QDs. The vertical-reflection-type switches investigated asymmetric that consists 12 periods GaAs/Al 0.8 Ga 0.2 As 25 for front back mirrors, respectively. thicknesses GaAs AlGaAs layers...
Abstract In this work, the influence of samples temperature and laser energy on optical emission spectra plasma parameters laser-induced breakdown spectroscopy for aluminum copper metallic target is investigated. The are uniformly cooled down to −70 °C heated up 200 by an external liquid nitrogen ceramic heater, respectively. formed generated ablating surface targets using Nd:YAG with energies 100 mJ, mJ 300 mJ. at ambient atmospheric pressure recorded HR4000 spectrometer. From these...
In present work, an inorganic dopant TiO2 nanoparticles are introduced into the PDPP3T polymer host material and deposited as thin films via spin coating. Different solvent investigated to get efficient dispersion of well effective dissolution material. The role particles towards optical absorption is studied by preparing different PDPP3T/TiO2 blend ratios annealed at temperatures. Toluene found for Significant increase in UV region 300-400nm observed ratio 1:0.2 annealing temperature 310oC....
Using DFT calculations, the impact of a group transition metals X = (Co, Ni, Mn, Ti) at Fe-site and rare earth element lanthanum (La) Bi-site is investigated in order to improve structural stability, spin polarized electronic, dielectric properties bismuth ferrite for switching energy multiferroic capacitor. The introduction La atoms alters spin-polarized electronic characteristics BFO, leading an increase density states (DOS) around Fermi level. descending structure stability co-doped BFO...
The present article reports the growth mechanism of zinc oxide (ZnO) nanowires grown on silicon substrate pre-coated with ZnO buffer layer by thermal evaporation method. are for different time 0, 30, 90 and 120 mins controlled supply Ar O 2 gas at 650 °C. structural, morphological crystallinity properties analyzed field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, high resolution transmission (HRTEM), diffraction (XRD). FESEM images infers that,...
The present work develops a computationally effective one-dimensional sub grid set in numerical integration for density formulation from thermal plasma. model incorporates two-body and more collision effects throughout Carbon plasma using continuity equation. carbon gas inter electrode gap is accelerated by the electric field to produce In this reaction processes of species identified. extrapolation dominant arc discharge process critical issue significant predicting nanostructure...
Abstract We propose a new design of the atom bottom‐up technique that uses an optical trapping tool to form layer within thin film grating. By using PANDA ring resonator, where atoms can be trapped, pumped and controlled by light, finally, trapped atoms/molecules selected, filtered, embedded required grating layers, which later nanobattery. In application, P‐type or N‐type prepared, desired nanobattery manipulated. The theoretical background light pulse in resonator is also reviewed. © 2012...
First-principles calculations are carried out to tune dielectric and magnetoelectric properties of pure doped bismuth ferrite BiFeO3 (BFO) with lanthanum (La) at A-site cobalt (Co) B-site as mono- co-dopants. These performed in the Cambridge Serial Total Energy Package (CASTEP) code by using ultra-soft pseudopotential (USP). A large band gap has been observed rhombohedral phase. The Co impurity atom is more favorable decrease while La pushes BFO towards half-metal, which develops 100%...
Ever since it was introduced, countless types of Dense Plasma Focus (DPF) devices have been proposed and developed. To compare the performance between different DPF side by without bias to any one them are quite challenging, as optimum condition for producing good pinch during radial compression varies each device. This work aim is systematically plasma dynamics before in variant electrode configuration based on its inductance evolution coaxial discharge. The determined measured discharge...
Summary form only given. The plasma focus device is a potential source for multi-radiation emission. Lee model has been developed with complete description of the dynamics to simulate motion in both axial and radial phase. code couples electrical circuit (PF) dynamics, thermodynamics radiation. Spherical special case between Mather Filippov configurations. electrodes made chamber design more compact when compare Mather-type Filippov-type. In this study, numerical simulation spherical using...