Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (17)
- Materials Science and Engineering (10)
- Chemistry (8)
- Electrical and Computer Engineering (8)
- Materials Chemistry (7)
-
- Electronic Devices and Semiconductor Manufacturing (5)
- Engineering Physics (5)
- Atomic, Molecular and Optical Physics (4)
- Mechanical Engineering (4)
- Optics (4)
- Semiconductor and Optical Materials (4)
- Statistical, Nonlinear, and Soft Matter Physics (4)
- Electrical and Electronics (2)
- Quantum Physics (2)
- Structural Materials (2)
- Analytical Chemistry (1)
- Biomaterials (1)
- Biomedical Engineering and Bioengineering (1)
- Geometry and Topology (1)
- Mathematics (1)
- Nanoscience and Nanotechnology (1)
- Physical Chemistry (1)
- Plasma and Beam Physics (1)
- Polymer Chemistry (1)
- Power and Energy (1)
- Keyword
-
- Manganese (2)
- Nanostructures--Synthesis (2)
- Phosphors (2)
- Thermoluminescence (2)
- Thin film (2)
-
- 4-ethylenedioxythiophene); Polystyrene sulfonate (PEDOT:PSS) (1)
- Alq3 (1)
- Ammonia (1)
- Annealing treatment (1)
- Bacteriorhodopsin. Subject term: Thin films. (1)
- Biophotovoltaic (1)
- Biosensors--Technological innovations. (1)
- Boronizing (1)
- Carbonaceous materials (1)
- Charge conduction mechanism (1)
- Chitosan Electrolyte; Ionic Conductivity; Aluminium Oxide; Cerium Oxide; Dielectric Properties (1)
- Complex refractive index (1)
- Compression method (1)
- Conducting polymers (1)
- Conduction charge mechanism (1)
- Critical dynamics (1)
- Crystal (1)
- Current leakage (1)
- Density functionals (1)
- Dielectric (1)
- Digital Holography System; Holographic Interferometry; Fresnel Kirchhoff Diffraction Integral; Charged Coupled Device Camera; Linear Thermal Expansion Measurement (1)
- Dislocation (1)
- Duplex stainless steel (1)
- Electrical properties (1)
- Electrode material (1)
Articles 1 - 28 of 28
Full-Text Articles in Condensed Matter Physics
Investigation Of The Interfacial Energy Level Within Organic Semiconducting Devices, Wong Wah Seng
Investigation Of The Interfacial Energy Level Within Organic Semiconducting Devices, Wong Wah Seng
Student Works (2020-2029)
This main goal of this research is investigating the interfacial energy level of organic semiconducting devices by correlated to the devices performance as well as physical/chemical change in the blended/mixed organic semiconductor system. The first project reported the high efficiency extra warm white organic light emitting diodes (WOLEDs) by blending tris(4-carbazoyl-9-ylphenyl)amine (TcTa) to poly(vinylcarbazole) (PVK). The hole current for PVK:TcTa (60:40) increased by one order of magnitude in hole only device, but the current efficiency of WOLEDs improved only by 7% compared to pristine PVK. Using Ultraviolet photoelectron spectroscopy (UPS), it was discovered the hole injection barrier between poly(3,4-ethylenedioxythiophene) polystyrene …
Trap-Assisted Tunneling Mechanism Of Zirconium Oxynitride (Zron) Thin Film On Silicon Carbide, Krishnamoorthy Nicklaane
Trap-Assisted Tunneling Mechanism Of Zirconium Oxynitride (Zron) Thin Film On Silicon Carbide, Krishnamoorthy Nicklaane
Student Works (2020-2029)
This research is a study on the possibilities of trap-assisted tunneling conduction mechanism in Zirconium Oxynitride (ZrON) after Zirconium (Zr) with thickness 5nm was sputtered on Silicon Carbide (SiC) substrate which then underwent simultaneous nitridation and oxidation in Nitrous Oxide (N2O) for 15 minutes in 4 different ambient temperatures of 400°C, 500°C, 700⁰C, 900°C. Electrical properties of the samples were then characterized by fabricating Al-gate MOS capacitors onto the film surface. Of all 4 samples, sample that was oxidized/nitrided at 500°C demonstrated to have the highest dielectric breakdown (EB) of 5.05 MV/cm and lowest EB was by sample that was …
Investigation Of Space-Charge-Limited Conduction Mechanisms In Fe3o4-Y-Fe2o3 Based On Sio2/N-Type Si Substrate, Nik Zumaihan Nik Nadia Aina
Investigation Of Space-Charge-Limited Conduction Mechanisms In Fe3o4-Y-Fe2o3 Based On Sio2/N-Type Si Substrate, Nik Zumaihan Nik Nadia Aina
Student Works (2020-2029)
In this work, thin films of functionalized Fe3O4-γ-Fe2O3 NPs deposited on n-type Si substrate was formed by self-assembly. The co-precipitation method was involved to synthesis the bare iron oxide NPs and the particles were altered to optimum pH 12 by using NH4OH. Iron oxide NPs were then undergone modification process with addition of 0.4 g oleic acid and 1.63 mmol functionalization 4-pentynoic acid. For electrical characterization of self-assembled 4-pentynoic acid functionalized Fe3O4-γ-Fe2O3 NPs on SiO2/n-Si substrate, the charge conduction mechanisms were quantitatively investigated and analyzed through the oxides for different heat treatment temperatures (70-300oC). In this study, the Ohm’s Law …
Analysis Of Space-Charge-Limited Conduction Mechanisms In Zron/Sic System, Hasnurashid Nur Hasdyanna
Analysis Of Space-Charge-Limited Conduction Mechanisms In Zron/Sic System, Hasnurashid Nur Hasdyanna
Student Works (2020-2029)
In this study, current conduction mechanism by space-charge-limited conduction (SCLC) and Poole-Frenkel (PF) emission on ZrON/SiC system that was oxidized and nitrided in N2O at various temperatures (400-900˚C) were analysed. The current-voltage (I-V) measurements were performed in Al-gate metal-oxide-semiconductor (MOS) capacitor by sputtering of Al film on top of the film and at the back of the substrate. Then, characterization of electrical properties was done according to two types of bulk-limited conduction, which are space-charge-limited conduction and Poole-Frenkel emission conduction. Space-charge-limited conduction and Poole-Frenkel emission have been systematically evaluated through data analysis method by the fitting of linear regression according …
Schottky And Poole-Frenkel Conduction Mechanisms In Zron/Sic System, Lusus Vanessa
Schottky And Poole-Frenkel Conduction Mechanisms In Zron/Sic System, Lusus Vanessa
Student Works (2020-2029)
In this work, the conduction mechanisms of Schottky Emission (SE) and Poole–Frenkel (PF) Emission for the ZrON/SiC system with a temperature range between 400 oC to 900 oC were analyzed. Understanding of the conduction charge mechanisms will help to estimate leakage characteristics of the ZrON/SiC system. Based on the J-E plot measured at different temperatures for 15 minutes, the obtained r2 was ranged between 0.90–0.98, which confirmed the data obtained complied with the standard SE model. Furthermore, the data plotted from the Effective Barrier Height Extracted from the SE plot showed the highest values of
Investigation Of Complex Refractive Index Of Grad Phene Oxide Using Polarisation Response Of Graphene Oxide-Coated Planarizeoptical Waveguide, Soon Xin Gan
Student Works (2020-2029)
Since a single atomic layer of carbon, also as known as graphene is being successfully exfoliated from 3D graphite, intense research on graphene and its derivative begins. Among them, graphene oxide (GO) is considered one of the most prominent candidates in the category of graphene derivatives for the application of electronic, optoelectronic and photonics. However, although GO has been applied in many applications like saturable absorbers of Q-switch laser and optical limiters for eye protection, its intrinsic optical properties especially complex refractive index reported so far still has a large deviation. Also, most of the optical characterization research on GO …
Growth Of Semi-Polar (11-22) Gan Epitaxial Layer On M-Plane Sapphire Via Mocvd, Anuar Mohd Afiq
Growth Of Semi-Polar (11-22) Gan Epitaxial Layer On M-Plane Sapphire Via Mocvd, Anuar Mohd Afiq
Student Works (2020-2029)
In the past few years, semi-polar (11-22) GaN has attracted much intention in the field of optoelectronics including light-emitting diodes (LEDs), laser diodes (LDs) and photodetectors. Commercially, GaN-based optoelectronic devices are grown along c-plane direction. However, c-oriented GaN-based optoelectronics suffer from piezoelectric polarization, which hinders the device performances. Conversely, semi-polar (11-22) GaN exhibits almost zero piezoelectric polarization effect. Furthermore, as the GaN wurtzite lattice is inclined approximately 58° respective to c-plane, it provides more sites for doping incorporation such as indium, silicon, aluminium, etc. Therefore, the semi-polar (11-22) GaN is presumed to be one of a promising candidate for efficient …
Nitrogen-Doped Graphene-Based Metal Composites For The Non-Enzymatic Detection Of Hydrogen Peroxide, Tajabadi Poor Mohammad Taghi
Nitrogen-Doped Graphene-Based Metal Composites For The Non-Enzymatic Detection Of Hydrogen Peroxide, Tajabadi Poor Mohammad Taghi
Student Works (2020-2029)
Recently, much attention has been devoted to detecting hydrogen peroxide (H2O2) because of its extensive range of applications in chemical synthesis, the textile industry, food production, fuel cell devices, and even in many oxidative biological reactions. Among the various methods of detection of H2O2, electrochemical sensors has many advantages, such as simplicity, high efficiency and sensitivity, as well as good selectivity., To improve the sensitivity of non-enzymatic sensors, noble metal nanoparticles with particular electrocatalytic activities can be utilized. The present research is aimed to design a hybrid approach for the development of novel nanostructures for non-enzymatic detection of H2O2. Herein, …
Development Of Nano Carbon And Conducting Polymers Based Ternary Composites For Supercapattery, Iqbal Javed
Development Of Nano Carbon And Conducting Polymers Based Ternary Composites For Supercapattery, Iqbal Javed
Student Works (2020-2029)
Although significant efforts have been devoted on the development of energy storage systems such as batteries and fuel cells in the past decades, the low power density, short cyclic life and high maintenance cost have kept them away from many applications. Alternatively, supercapattery which has the characteristic features of batteries as well as supercapacitors has gained much attention because of its rapid charge/discharge mechanism, long life cycle, and high power density. However, supercapattery generally suffers from poor energy density. This research aims to develop carbon and conducting polymers based ternary nanocomposites for high performance supercapattery. Pristine metal oxide nanostructures suffer …
Thermodynamic Properties Of Transverse Field Quantum Ising Model Using Tensor Network Formalism, Sin Yang Pang
Thermodynamic Properties Of Transverse Field Quantum Ising Model Using Tensor Network Formalism, Sin Yang Pang
Student Works (2020-2029)
Ising model has been successful in describing ferromagnetism and its phase transition to paramagnet. At the critical point, the free energy density function and its derivatives diverge. Their behaviour near the critical point are described by power-laws with associated critical exponents. In many cases, the critical exponents can be determined from analytic solutions via conventional renormalization groups methods or from Monte Carlo simulations. However, for quantum many-body systems, very few are tractable to analytical solutions. The quantum many-body wavefunction belongs to large dimensional Hilbert space that increases exponentially with system size. If the Hamiltonian is gapped and only local interaction …
Validation Of Trap Density Theory In Single Layer Organic Light Emitting Diodes With Tris(8 Hydroxyquinolinato)Aluminium As The Emissive Material, Zaini Mohd Suffian
Validation Of Trap Density Theory In Single Layer Organic Light Emitting Diodes With Tris(8 Hydroxyquinolinato)Aluminium As The Emissive Material, Zaini Mohd Suffian
Student Works (2020-2029)
Organic light-emitting diodes (OLEDs) rapidly evolving as the future of solid-state lighting and display application due to its numerous advantages and features. However, the efficiency, lifetime, and fabrication method still need to be improved. Even in solving efficiency issues in the device, there are many challenges to be addressed and overcome. In theory, charge transport phenomena contribute greatly towards increasing or improving the device efficiency. The magnitude of carrier mobility determines the performance of the device, as it influenced device efficiency. For organic semiconductor such as OLED, space-charge limited current (SCLC) theory was used to determine the mobility of the …
Vanadyl Tetrabutyltetrakis(Dimethylamino) Phthalocyanine Based Thin Films For Organic Sensor And Transistor Applications, Nur Adilah Roslan
Vanadyl Tetrabutyltetrakis(Dimethylamino) Phthalocyanine Based Thin Films For Organic Sensor And Transistor Applications, Nur Adilah Roslan
Student Works (2020-2029)
Organic electronic devices have been successively making progress into the commercial market to substitute conventional inorganic electronic devices. The endeavor to improve the performance displayed by organic semiconductor materials has urged a substantial number of researchers set to seek new materials. Metal phthalocyanines (MPcs), in particular, have garnered much attention due to their enticing benefits viz., cost efficiency, eco-friendly organic material, as well as thermal and chemical stability. Primarily, this study investigated the physical, morphological, optical, and electrical properties of vanadyl 3,10,17,24-tetra-tert-butyl-1,8,15,22-tetrakis(dimethylamino)-29H,31H-phthalocyanine or synonymously known as vanadyl tetrabutyltetrakis (dimethylamino) phthalocyanine (VTP). Subsequently, this study looked into the potential applications of …
Characterization Of Reduced Graphene Oxide Anode For Application In Algae Biophotovoltaic Platforms, Siti Aisyah Ibrahim
Characterization Of Reduced Graphene Oxide Anode For Application In Algae Biophotovoltaic Platforms, Siti Aisyah Ibrahim
Student Works (2020-2029)
Research interest in recent times has placed much focus on electrode technology for biophotovoltaics (BPV) especially in algal fuel cells (AFCs) application. The purpose of this investigation is therefore directed towards optimizing reduced graphene oxide (rGO) thin film as an electrode for AFCs application by means of annealing and plasma treatment. First stage involves deposition of six (6) layers of rGO thin film using Langmuir-Blodgett (LB) method. The anode electrodes were then annealed at different temperatures under vacuum condition. For plasma treatment meanwhile, a variation of voltage was used to vary the plasma conditions resulting in different surface morphology. To …
Synthesis And Characterization Of Hybrid Organic Coating System To Reduce Thermal Degradation Of Solar Cells, Mohd Zaini Farah Khaleda
Synthesis And Characterization Of Hybrid Organic Coating System To Reduce Thermal Degradation Of Solar Cells, Mohd Zaini Farah Khaleda
Student Works (2020-2029)
Thermal-decreasing hybrid organic coatings were developed for crystalline solar cells by using two types of binder systems; namely Aminopropyltriethoxysolution (APTES) / Methyltrimethoxysilane (MTMS) binder system (labelled as B1) and Methyltrimethoxysilane (MTMS) / nitric acid (HNO3) binder system (labelled as B2). Three types of nanoparticles; Titanium dioxide, TiO2 (Anatase), Zinc oxide, ZnO and Tin dioxide, SnO2 nanoparticles with different weight percentage were introduced inside each binder system namely; 20 wt%, TiO2 (T1B1 coating), 60 wt% TiO2 (T2B1 coating), 20 wt% ZnO (Z1B1 coating), 60 wt% ZnO (T2B1 coating), 20 wt% SnO2 (S1B1 coating) and 60 wt% SnO2 (S2B1 coating) for B1 …
Ionic Conductivity And Related Studies In Methyl Cellulose Based Polymer Electrolytes And Application In Supercapacitors., Noor Erwani Azura Shuhaimi
Ionic Conductivity And Related Studies In Methyl Cellulose Based Polymer Electrolytes And Application In Supercapacitors., Noor Erwani Azura Shuhaimi
Student Works (2010-2019)
Solid polymer electrolytes based on methyl cellulose (MC) were investigated. Two MC based polymer electrolytes systems were prepared using solution cast technique. These are MC-ammonium nitrate (NH4NO3) system and MC-NH4NO3 system plasticized with poly (ethylene glycol), (PEG). NH4NO3 was chosen as the proton source to make MC, a biodegradable polymer conductive. The room temperature conductivity of pure MC is 3.08 × 10-11 S cm-1. The conductivity is increased up to 2.10 × 10-6 S cm-1 with addition of 25 wt.% NH4NO3. To enhance conductivity of MC-NH4NO3 system, PEG was added to 75MC25AN solution in different concentrations (from 5 to 25 …
Superplastic Boronizing On Duplex Stainless Steel (Dss) Using Compression Method., Yong Siu Fung
Superplastic Boronizing On Duplex Stainless Steel (Dss) Using Compression Method., Yong Siu Fung
Student Works (2010-2019)
The formation and growth of boride phases on duplex stainless steel (DSS) during superplastic boronizing (SPB) were studied in comparison with conventional boronizing (CB) from previous research. SPB is a surface hardening technique that combines boronizing with superplastic deformation. It utilizes the ultra high plasticity phenomenon in metal while carrying out boronizing in which boron atoms are diffused into the metal substrate to form hard boronized layer. The SPB process was conducted under compression mode at a strain rate of 2 × 10-4 s-1, at three different temperature conditions (1223 K, 1273 K, 1373 K) and strains (0.2 to 0.6). …
Morphological Study Of Surface Corrosion In Carbon Steel Using Fractal Methods., Abdul Mohaimen W Fagri
Morphological Study Of Surface Corrosion In Carbon Steel Using Fractal Methods., Abdul Mohaimen W Fagri
Student Works (2010-2019)
Corrosion can be defined as the disintegration of a material into its constituent atoms due to chemical reactions with its surroundings. There are various chemical and physical factors that affect the rate and mechanisms of corrosion processes. In this study, we focus on the corrosion of carbon steel in mineral water at room temperature. The morphologies of corroded surface are characterized using fractal analysis. The steel plates of 10cmx10cmx0.2cm are first polished using abrasive papers of different coarseness until smooth surfaces are obtained. The samples are placed in glass dish filled with mineral water and a simple imaging procedure using …
Vibrational Frequencies Of Magnetic Random Access Memory Materials., Lee Li Ling
Vibrational Frequencies Of Magnetic Random Access Memory Materials., Lee Li Ling
Student Works (2010-2019)
The advantages of MRAM are so overwhelming which acts as motivation for scientist in further investigation for better read and write operation. The types of materials used are closely related to the cell performance in forming the ferromagnetic layers. Thus,the vibrational frequencies of the MRAM materials are of interest. Clusters for the two types of combinations, FexNiy and FexCoyBz are built. Subsequently, vibrational frequencies of each cluster are calculated theoretically from the first principles. The secular determinant is large when the number of electrons in a cluster is large. For the simplest combination of Fe-Ni cluster, (atomic number of an …
The Thermoluminescence Properties Of Manganese Doped Zns Nanophosphor., Khalid Humaid Zahir Al-Hinai
The Thermoluminescence Properties Of Manganese Doped Zns Nanophosphor., Khalid Humaid Zahir Al-Hinai
Student Works (2010-2019)
The thermoluminescence (TL) properties of Manganese (Mn) doped ZnS nanophosphors were investigated after gamma irradiation at room temperature. The ZnS:Mn nanophosphors were prepared by chemical precipitation method by using Zinc sulfate, Sodium sulfide and Manganese sulfate. 1 mole, 2 moles and 3 moles of Manganese sulfate were used to have different concentrations of Mn in doped ZnS. The formation of the nanophosphors was characterized by high resolution scanning electron microscopy FESEM, XRD and EDX. The obtained products consist of particles with the dimension about 85–150nm. Comparison between ZnS nanophosphors and commercial ZnS powder glow curves was studied. It was observed …
The Thermoluminescence Properties Of Manganese Doped Zns Nanophosphor, Khalid Humaid Zahir Al-Hinai
The Thermoluminescence Properties Of Manganese Doped Zns Nanophosphor, Khalid Humaid Zahir Al-Hinai
Student Works (2010-2019)
The thermoluminescence (TL) properties of Manganese (Mn) doped ZnS nanophosphors were investigated after gamma irradiation at room temperature. The ZnS:Mn nanophosphors were prepared by chemical precipitation method by using Zinc sulfate, Sodium sulfide and Manganese sulfate. 1 mole, 2 moles and 3 moles of Manganese sulfate were used to have different concentrations of Mn in doped ZnS. The formation of the nanophosphors was characterized by high resolution scanning electron microscopy FESEM, XRD and EDX. The obtained products consist of particles with the dimension about 85–150nm. Comparison between ZnS nanophosphors and commercial ZnS powder glow curves was studied. It was observed …
Mechanical And Thermodynamic Properties Of Bacteriorhodopsin Langmuir Film., Vijayandren Kuppusamy
Mechanical And Thermodynamic Properties Of Bacteriorhodopsin Langmuir Film., Vijayandren Kuppusamy
Student Works (2010-2019)
Bacteriorhodopsin is a photoactive protein found in the purple membranes of the highly halophilic bacterium Halobacterium Salinarium. Due to highly efficient and simple in its function, Bacteriorhodopsin has been extensively researched and successfully incorporated into many practical applications. In this regard, the fabrication of compactly packed and functionally active Bacteriorhodopsin thin film is crucial in realizing a highly efficient device. The aim of this thesis is to analyze the mechanical and thermodynamic properties of the Bacteriorhodopsin-Langmuir monolayer film from the surface pressure-area per molecule isotherm to produce a compactly pact and functionally active monolayer film. For this, we have proposed …
Band Structure Of Fe Based Superconductors., Teh Yee Lin
Band Structure Of Fe Based Superconductors., Teh Yee Lin
Student Works (2010-2019)
Several iron containing superconductors are discovered in 2008. The discovery introduced a new class of high-temperature superconductors, which are iron-based. The iron-based superconductors do not resemble conventional superconductors and have properties on their own which differ from the cuprates. We have studied the iron selenium, FeSe compound by removing some Se atoms from the lattice forming Fe:Se = 2:1 and 8:6 and also by replacing the Se vacancy with tellurium, samarium and oxygen atoms forming Fe:Se:Te = 2:1:1 and 8:6:2, Fe:Se:O = 8:6:2 and 8:4:2, FeSeSmO, FeSeTeO, Fe2SeSm2O2, FeSeTeSmO and FeTeSmO. The band structures for each lattice are calculated by …
Oxidation-Induced Stacking Fault In (100) And (111) Silicon Wafers, Mei Keat Liang
Oxidation-Induced Stacking Fault In (100) And (111) Silicon Wafers, Mei Keat Liang
Student Works (2000-2009)
Oxidation-induced stacking fault (OISF) dimension and density change on (100) and (111) wafers, as a result of repeated preferential etching were studied using AFM. optical microscope and angular polishing techniques. Density on (100) and (111) wafers is independent of surface removal up to 3.0µm. This indicates the single layer nature of OISF formed from the sand blasted wafer. Besides having higher density, OISFs from (100) wafer were longer than OISF from (111) wafer. OISF width increases linearly with surface removal however the length does not change significantly with surface removal. ln the OISF normal depth studies using angular polishing technique, …
The Effect Of Aluminium Oxide And Cerium Oxide As Dispersoids In Chitosan-Lithium Acetate Complexes, Hoi Mien Leow
The Effect Of Aluminium Oxide And Cerium Oxide As Dispersoids In Chitosan-Lithium Acetate Complexes, Hoi Mien Leow
Student Works (2000-2009)
In this study, chitosan with 85% deacetylation was used with Ni(OAc)₂·2H₂O as doping salt and Al₂O₃, or CeO₂ as dispersoid. They were mixed in certain weight percentages and dissolved in 100ml of 0.5% acetic acid solution. These solutions were poured into petri dishes and left at room temperature for film formation. Infrared Spectroscopy has shown that there is interaction between chitosan and LiOAc with and without dispersoid. The peaks are shifted. broadened. split and differs in intensity. The electrical conductivity of all samples was calculated using the bulk resistance value obtained from the complex admittance plot. The highest electrical conductivity …
Sulphide Based Materials As Potential Anodes In Lithium Ion Cells, Azlin Sanusi
Sulphide Based Materials As Potential Anodes In Lithium Ion Cells, Azlin Sanusi
Student Works (2000-2009)
Sulphides based compounds PbS and SnS have been studied as possible anode material in lithium ion cell. PbS was prepared by the chemical bath deposition technique and SnS by the double decomposition method. Both samples were characterized by the powder X-ray diffraction technique and energy dispersive analysis of X-rays (EDAX). The room temperature electrical conductivity of PbS is 2.6 x 10⁻⁴ S cm⁻¹ and SnS is 5.3 x 10⁻⁷ S cm⁻¹ while at 90°C the electrical conductivity of PbS is 3.3 x 10⁻⁴ S cm⁻¹ and SnS is 2.90 x 10⁻⁶ S cm⁻¹ Cyclic voltammetry determined the potential anode ability …
Synthesis And Characterization Of Lithiated Mixed Metal Oxides For Lithium Ion Rechargeable Batteries, Seng Gee Tan
Synthesis And Characterization Of Lithiated Mixed Metal Oxides For Lithium Ion Rechargeable Batteries, Seng Gee Tan
Student Works (2000-2009)
Lilhiated mixed metal oxides for lithium ion rechargeable batteries were prepared by the sol gel technique. Samples consisting of lithium acetate, nickel nitrate, cobalt nitrate, manganese acetate and aluminium fluoride were characterised using X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIRS). Energy Dispersive Analysis of X-rays (EDAX) w1d Cyclic Voltammetry (CV). Thermal characterization shows that the acetates, nitrates and fluorides of precursors material deform at temperature between 50° to 100°C and the products begin to form at a temperature between 264°C to 271°C. FTIR studies show that the materials must be heated for a longer time …
Effects Of Argon Dilution Of Silane On The Optical Properties And Surface Morphology Of Hydrogenated Amorphous Silicon, Choon Kheam Lim
Effects Of Argon Dilution Of Silane On The Optical Properties And Surface Morphology Of Hydrogenated Amorphous Silicon, Choon Kheam Lim
Student Works (2000-2009)
Hydrogenated amorphous silicon (a.Si:H) was prepared using the d.c plasma grow discharge system. Two sets of samples were prepared and studied. The first set of samples referred to as the high argon dilution films were prepared from the discharge of pure silane at flow-rate of 5sccm and silane at the same flow-rate diluted in argon at flow-rates of 5, 10 and 15sccm. Similarly, the second set of sample referred to as the low argon dilution films were prepared from the discharge of pure silane at flow-rate of20sccm and silane at the same flow-rate diluted in argon at the flow-rates mentioned …
Digital Holography And Application In Laser Metrology, Thian Khok Yong
Digital Holography And Application In Laser Metrology, Thian Khok Yong
Student Works (2000-2009)
A digital holography system has been developed in this study. The object is recorded and the hologram is stored electronically with a charged-couple-device (CCD) camera without any focusing optics. The reconstruction of the digitally sampled hologram is done numerically with a computer. The algorithm and software for numerical reconstruction, which consists in a numerical realization of the Fresnel-Kirchhoff diffraction integral, are designed and implemented with twodimensional and three-dimensional simple objects. The characteristics of the system have been studied. For the CCD camera (768x494 pixels) been used with spatial resolution of about I 00 lines/mm, the angle between reference and object …