A5090557366- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Natural Fiber Reinforced Composites
- Magnetic and transport properties of perovskites and related materials
- Cellular and Composite Structures
- Mechanical Behavior of Composites
- Iron-based superconductors research
- Nonlinear Optical Materials Research
- Theoretical and Computational Physics
- Rare-earth and actinide compounds
- Corporate Taxation and Avoidance
- Luminescence Properties of Advanced Materials
- Additive Manufacturing and 3D Printing Technologies
- Magnetic properties of thin films
- Crystallization and Solubility Studies
- Multiferroics and related materials
- Conducting polymers and applications
- Polymer composites and self-healing
- Iron oxide chemistry and applications
- Acoustic Wave Phenomena Research
- Mechanical Engineering and Vibrations Research
- X-ray Diffraction in Crystallography
- Solidification and crystal growth phenomena
- Crystal structures of chemical compounds
- Solid-state spectroscopy and crystallography
Khalifa University of Science and Technology
2015-2024
Institute of Physics, Academia Sinica
2004-2021
University of Auckland
2009-2021
Vikram Sarabhai Space Centre
2021
Academia Sinica
2007-2011
National Tsing Hua University
1994-2009
Missouri University of Science and Technology
2009
Alabama Agricultural and Mechanical University
1990-1995
University of Alabama
1993
Texas A&M University
1991
In this study, the effect of reduction on electrical conductivity Graphene Oxide (GO) is investigated. The aim fabrication was to render electromagnetic interference (EMI) shielding thin polymer films using GO as fillers. determined four-probe method and effectiveness theoretically experimentally obtained values. initial oxidation graphite performed Hummers’ oxidized dispersed in water for further exfoliation by ultrasonication. Thin sonicated dispersions were solution casted dried a...
Crystals of FeSe0.88 and FeSeMn0.1 have been grown from KCl solutions. measuring 2−3 mm across 0.1−0.3 thick grow with a hexagonal plate like habit. Powder X-ray diffraction (XRD) measurements show strong peaks corresponding to the tetragonal α-FeSe phase weak β-FeSe in both cases. The side crystal is identified be (101) face α-FeSe. Energy dispersive spectroscopic (EDS) that Mn substitutes for Fe. Both types crystals superconducting transition at 8 K DC magnetization broad resistive zero...
In this study, the influence of compaction load, layup speed and temperature on adhesive properties automated fibre placement grade towpreg has been investigated ply-tool interface where higher peel forces are required to permit deposition subsequent plies. The process was simulated a CNC milling machine, using roller assembly adhesion were determined floating test. processing window for dynamic mechanical analyser two-level, full factorial design experiments developed three factors,...
Critical issues concerning emerging Fe-based superconductors include the degree of electron correlation and origin superconductivity. X-Ray absorption spectra (XAS) resonant inelastic X-ray scattering (RIXS) FeSe(1-x)Te(x) (x = 0-1) single crystals were obtained to study their electronic properties that relate The linewidth Fe L(2,3)-edges XAS is narrower than Fe-pnictides, revealing difference between hybridization effects localization character those other Fe-pnictides. While no...
The current study focuses on manufacturing, recycling and mechanical testing of thin (1.5 mm) sisal-PP extruded composite sheets. An 3-factor two-level experimental design based the Taguchi method was applied in manufacturing sheets to maximise their properties. obtained by setting factors predicted analysis were mechanically recycled pelletising feeding through extruder. effects crystallinity, fibre length, properties stress-relaxation evaluated. By selecting a mass 30%, polymer MFI 1.3...
X-ray absorption spectroscopy (XAS) Fe K-edge spectra of the FeSe x (x=1-0.8)single crystals cleaved in situ vacuum reveal characteristic 4sp states, a lattice distortion and Se point to strong 3d-Se 4p hybridization giving rise itinerant charge carriers.A formal ~1.8+ for ~2.2-forSe were evaluated from these (x=0.88).The balance between is assigned electrons located Fe-Se bond.As decreases hole count increases crystal structure observed that turn causes separation ab plane change orbital...
The low velocity impact response of composite materials manufactured from dry fibre tows using the automated placement technique has been investigated. Following placement, preforms were infused with an epoxy resin. influence incorporating graphene oxide (GO) nanoparticles into matrix was investigated, and these samples compared to that its plain resin counterpart. Flexural tests undertaken in this study understand GO nano-filler loading on mechanical behaviour unreinforced introduction...
An improved technique of convective solution transport using KCl as solvent at 840–790 °C (where mass takes place across a vertical temperature gradient) is described for the growth crystals recently discovered superconductor α-FeSex (x = 1−0.8). The were annealed in situ 400–350 20–30 h to improve superconducting properties. Hexagonal plate like measuring 5–6 mm and 0.25–0.5 thick obtained. High resolution transmission electron microscopy (HRTEM) measurements show good crystallinity energy...
Using measurements of polarization-dependent soft-x-ray absorption and band-structure calculations including the on-site Coulomb interaction, we investigated symmetry intrinsic $3d$ holes in low-dimensional quantum magnet ${\text{LiCu}}_{2}{\text{O}}_{2}$ with edge-sharing spin chains. The $\text{Cu}\text{ }L$-edge $\text{O}\text{ }K$-edge in-plane out-of-plane $\mathbf{E}$ vectors x ray reveal orbital character valence states Cu on different sites. unoccupied nominal ${\text{Cu}}^{2+}$...
The unusual magnetic properties of thin films Fe1−xCoxOy {0≤x≤1} ferrite solid solutions have been explained through an investigation their electronic structure. x-ray absorption near-edge structure (XANES) spectra the Fe L3-edge and K-edges show that Co replaces Fe3+ in tetrahedral (Td) sites up to x = 0.34 octahedral (Oh) from 0.39<x<0.89. O K-edge results indicate mixed valence states as it at dissimilar sites. From results, is concluded spinel arise Td replacement Fe2+ by Oh a crossover...
In the current age of growing environmental awareness, natural fibre composites have gained wide acceptance in various facets engineering. However, industries, such as aerospace and mining, their is primarily dependent on them meeting stringent fire test requirements. this paper, symmetric laminates consisting only glass, glass/flax hybrid flax reinforcements thermoset matrices were tested for time to ignition, heat release rate smoke constituents per standard ASTM E 1354 a cone calorimeter....
In this work, the manufacturing characteristics and a performance evaluation of carbon fiber–reinforced epoxy honeycombs are reported. The vacuum-assisted resin transfer molding process, using central injection point, is used to infuse unidirectional dry slit tape with system Prime 20 LV in wax mold. compression behavior manufactured honeycomb structure was evaluated by subjecting samples quasi-static loading. Failure criteria for reinforced were developed failure maps constructed. These can...
Single crystals of mixed methyl-(2,4-dinitrophenyl)-aminopropanoate (MAP): 2-methyl-4-nitroaniline (MNA) have been grown from solution using a 40:60 mixture ethanol and ethyl acetate. Formation an equimolar complex is confirmed by x-ray diffraction studies. The crystallizes in the monoclinic space group P21. lattice parameters are a=6.9196(±0.005) Å; b=7.673(±0.008) c=18.554(±0.001) β=92.547(±0.006)0. b axis unique twofold there two molecules per unit cell. stack along with MAP atop MNA MAP....