Fairuz Diyana Ismail

• Doctor of Philosophy
• Senior Lecturer at University of Technology Malaysia

The present study designates the photocatalytic degradation efficiency of RhB dye using cerium-cobalt co-doped BiFeO 3 nanoparticles. Nanoparticles of Ce 0.1 Co x Bi 1-x Fe 2 O 3 (0 ≤ x ≤ 0.2) have been facilely synthesized via sol-gel auto-combustion method. FESEM analysis revealed the irregular-shaped nanoparticles with agglomerated coalescence b...

Chalcopyrite semiconductors are widely used as absorbers in thin film solar cells, especially flexible solar cells, due to their high power conversion efficiency. They also have interesting mechanical properties, making them promising materials for flexible, light, and thin solar cells. In this work, we report the first-principle calculations of th...

A non-contact salinity sensor using a bifurcated fiber bundle sensing is proposed. The sensor was operated based on intensity modulation due to the variation of displacement between the tip of the probe with the surface of the sample. The light that reflected back into the receiving fiber bundle is analysed and correlation with the salinity of the...

First-principles calculations are carried out to grow half-metallicity, tune dielectric and magnetoelectric properties of pure and doped bismuth ferrite BiFeO3 (BFO) with lanthanum (La) at A-site and cobalt (Co) at B-site as mono- and co-dopants. These calculations are performed in the Cambridge Serial Total Energy Package (CASTEP) code using ultra...

Bismuth ferrite BiFeO3 (BFO) is one of the most studied multiferroic materials. The coupling between electric polarization and magnetization provides the potential for the next-generation low-switching memory devices. To enhance the switching functionality of BFO, the effect of lanthanum (La) at A-site and cobalt (Co) at B-site as mono- and co-dopa...

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 types side by side without bias to any one of them are quite challenging, as the optimum condition for producing good pinch during the radial compression varies for each device. This wo...

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. ZnO nanowires are grown for different growth time of 0, 30, 90 and 120 mins with controlled supply of Ar and O 2 gas at 650 °C. The structural, morphological and crystallinity prop...

In this work, the influence of samples temperature and laser energy on the optical emission spectra and plasma parameters of laser-induced breakdown spectroscopy for aluminum and copper metallic target is investigated. The samples are uniformly cooled down to −70 °C and heated up to 200 °C by an external liquid nitrogen and ceramic heater, respecti...

In this paper, the effect of Nd:YAG laser wavelength and energy on the synthesis of gold nanoparticles is reported. Gold nanoparticles colloidal solutions were prepared by pulsed laser ablation of gold target in deionized water. The Nd:YAG laser with repetition rate of 1 Hz was assigned to supply energy at fundamental and second harmonic wavelength...

In present work, an inorganic dopant TiO 2 nanoparticles are introduced into the PDPP3T polymer host material and deposited as thin films via spin coating. Different solvent are investigated to get efficient dispersion of TiO 2 nanoparticles as well as effective dissolution of PDPP3T material. The role of TiO 2 particles towards optical absorption...

Plasma focus (PF) generation has advanced the development of high-density, high-temperature plasma that emits intense radiation. The radiation output and emission spectra depend on the operating parameters of the PF device. The ability to focus plasma governs the pinch radius and electrical properties at the truncated end of the PF device. In this...

Self-absorption (SA) can drastically affect the emission signal which makes quantitative and, in extreme cases, qualitative investigations very challenging in laser induced plasma spectroscopy. In this study, plasma parameters are spectroscopically studied and SA in aluminum emission lines is investigated at various laser energies and gate delays....

In this work, the design and construction of a 50 Ω fast Faraday cup and its results in correlation with the Lee Model Code for fast ion beam and ion time of flightmeasurements for a Deuterium filled plasma focusdevice are presented. Fast ion beam properties such as ion flux, fluence, speed, and energy at 2–8 Torr Deuterium are studied. The minimum...

Numerous configurations of plasma focusdevices (PFD) have been introduced around the globe. The distinct electrode configuration of the PFD will give out different inductance profile. A circuit analysis has been done to study on the significant difference between the inductance evolution in a coaxial discharge based on various published results of...

The present work develops a computationally effective one-dimensional sub grid set in numerical integration for density formulation from thermal plasma. The model incorporates two-body and more collision effects throughout Carbon plasma using continuity equation. The carbon gas inter electrode gap is accelerated by the electric field to produce pla...

The plasma focus device is a potential source for multiradiation emission. Lee model has been developed with a complete description of the plasma focus dynamics to simulate the plasma motion in both the axial and radial phase. The code couples the electrical circuit with plasma focus (PF) dynamics, thermodynamics and radiation. Spherical plasma foc...

Current sheath dynamics generated in INTI plasma focus device operated with neon gas has been studied. A 3-turn Rogowski coil design has been used to measure derivative current. A new magnetic probe was designed and used to study of current sheath arrival time, current profile and velocity variation in the axial phase at different experimental cond...

We propose a new design of the atom bottom-up technique that uses an optical trapping tool to form the atom trapping layer within a thin film grating. By using a PANDA ring resonator, where atoms can be trapped, pumped and controlled by light, where finally, the trapped atoms/molecules can be selected, filtered, and embedded within the required thi...

In this paper, we present the use of mathematical modeling of dielectric mirror known as known as Bragg reflector for optical design. A device system consists of the identical alternating layers using high and low refractive indices. Results obtained have shown that the model applications such as quarter-wavelength layers, unequal-length layers, sh...

The effect of self absorption becomes significant when plasma is dense enough to behave as optically thick. It is essential to account for the effect of self-absorption in that case. The variation of radial trajectory is investigated in this paper. In order to analyze the effect of self absorption of line radiation is investigated in argon plasma b...

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 this novel device have been investigated, which include the QD/cavity nonlinearity with appropriately designed mirrors and the intersubband carrier dynamics inside QDs. The vertical-re...

A novel design of a blood cleaner on-chip using an optical waveguide known as a PANDA ring resonator is proposed. By controlling some suitable parameters, the optical vortices (gradient optical fields/wells) can be generated and used to form the trapping tools in the same way as optical tweezers. In operation, the trapping force is formed by the co...

The equilibrium process of plasma nitrogen species by chemical kinetic reactions along various pressures is successfully investigated. The equilibrium process is required in industrial application to obtain the stable condition when heating up the material for having homogenous reaction. Nitrogen species densities is modeled by a continuity equatio...