A5004018540- Iron-based superconductors research
- Physics of Superconductivity and Magnetism
- Superconductivity in MgB2 and Alloys
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Superconducting Materials and Applications
- Conducting polymers and applications
- Organic and Molecular Conductors Research
- Boron and Carbon Nanomaterials Research
- Advanced Thermoelectric Materials and Devices
- Advanced Thermodynamics and Statistical Mechanics
- Thermal properties of materials
- Magnesium Alloys: Properties and Applications
- MXene and MAX Phase Materials
- Advanced Nanomaterials in Catalysis
- Advanced biosensing and bioanalysis techniques
- Ferroelectric and Piezoelectric Materials
- Chalcogenide Semiconductor Thin Films
- Hydrogen Storage and Materials
- Extracellular vesicles in disease
- Characterization and Applications of Magnetic Nanoparticles
- Gas Sensing Nanomaterials and Sensors
- Ammonia Synthesis and Nitrogen Reduction
- 2D Materials and Applications
University of South Australia
2024
Queensland University of Technology
2015-2023
Regroupement Québécois sur les Matériaux de Pointe
2015-2017
Université de Sherbrooke
2015-2017
University of Wollongong
2009-2013
In this work, the role that manganese plays in determining structure and performance of sintered biodegradable porous Fe–Mn alloys is described. Powder metallurgy processing was employed to produce a series Fe-xMn (x = 20, 30, 35 wt %) suitable for bone scaffold applications. Increasing content increased porosity volume influenced ensuing properties metal. The Fe-35Mn alloy possessed optimum orthopedic application. X-ray diffraction analysis magnetic characterization confirmed predominance...
Magnetic nanozymes with peroxidase-mimicking activity have been widely investigated for developing molecular biosensors. Herein, we report a starch-assisted method the synthesis of novel class carboxyl group-functionalized iron oxide nanoparticles (C-IONPs). Scanning electron and transmission microscopy analysis revealed that possess spherical shape an average size ∼250 nm. Peroxidase-mimicking C-IONPs was through catalytic oxidation 3,3′,5,5′-tetramethylbenzidine (TMB) in presence H2O2. The...
Recently, two-dimensional (2D) materials and their heterostructures have attracted considerable attention in gas sensing applications. In this work, we synthesized 2D MoS2@MoO3 through post-sulfurization of α-MoO3 nanoribbons grown via vapor phase transport (VPT) demonstrated highly sensitive NO2 sensors based on the hybrid heterostructures. The morphological, structural, compositional properties hybrids were studied by a combination advanced characterization techniques revealing core-shell...
Abstract Low‐cost flexible organic light‐emitting diodes (OLEDs) with nanoemitter material from waste open up new opportunities for sustainable technology. The common emitter materials generated are carbon dots (CDs). However, these have poor luminescent properties. Further solid‐state emission quenching makes application in display devices challenging. Here, and rigid OLED demonstrated using self‐assembled 2D arrays of CDs derived material, viz., human hair. High‐performance a quantum yield...
Magnesium diboride (MgB2) magnets have the potential to be next-generation Liquid-helium-free magnet for magnetic resonance imaging (MRI) application due their relatively high superconducting transition temperature, current density and low raw material cost compared with commercial niobium-titanium (Nb-Ti) magnets. A typical includes several coils. To produce an ultra-stable field in MRI, a electromagnet operating persistent mode is crucial. Superconducting coils of MRI are short-circuited...
The vortex pinning mechanisms of Ba0.72K0.28Fe2As2 single crystal have been studied systematically as a function temperature and magnetic field. dependence the critical current density, Jc(T), was analysed within collective model at different fields. It found that both δl mechanism, i.e., associated with charge-carrier mean free path fluctuation, δTc which is spatial fluctuations transition temperature, coexist in fields smaller than 4 T. Their contributions are strongly field dependent. At...
The temperature and magnetic field dependences of the magnetization critical current density Fe1.04Te0.6Se0.4 single crystals have been investigated, flux pinning mechanism has analysed. normalized force (fp = Fp/Fp,max) vs. h(H/Hirr) curves, are scaled using Dew-Hughes' theory, f(h) ≈ hp(1 − h)q with p 1.35 q 3.06. angular dependence resistivity under different fields shows a dip-like structure, below superconducting transition temperature. anisotropic value 2 was obtained Ginzburg-Landau theory.
Underdoped BaFe1.9Co0.1As2 single crystal was studied by angular dependence of magneto-transport at fields up to 13 T over a wide range temperature. Our results show that pinning potential, Uo, decreases slightly for θ ≤ 45° and remains constant ≥ 45°, while the upper critical field, Hc2, irreversibility Hirr, increase with θ. According anisotropic Ginzburg-Landau theory, anisotropy determined scaling resistivity under different magnetic below superconducting temperature, Tc. Anisotropy, Γ,...
We study the influence of inelastic electron-electron scattering on temperature variation Seebeck coefficient in normal phase quasi-one-dimensional organic superconductors. The theory is based numerical solution semiclassical Boltzmann equation for which collision integral solved with aid renormalization-group method electronic umklapp vertex. show that one-loop flow momentum and temperature-dependent scattering, presence nesting alterations Fermi surface, introduce electron-hole asymmetry...
Abstract Stretchable conducting films are a prime necessity for future stretchable and wearable electronics. In this work, highly poly(3,4 ethylenedioxythiophene):Tosylate (PEDOT:Tos) deposited on extremely styrene‐ethylene‐butylene‐styrene (SEBS) substrates via vapor phase polymerization (VPP) their inherent properties systematically studied. The charge transport electrical of VPP PEDOT:Tos measured from room temperature down to the low 5 K. Interestingly, mechanical substrate lead buckling...
Crystalline Ni2B, Ni3B, and Ni4B3 are synthesized by a single-step method using autogenous pressure from the reaction of NaBH4 Ni precursors. The effect temperature, pressure, time, starting materials on composition products, particle morphologies, magnetic properties is demonstrated. High yields Ni2B (>98%) achieved at 2.3–3.4 MPa ~670 °C over five hours. Ni3B or form in conjunction with higher temperature proportions influenced ratios initial reactants. For same reactants, longer time...
Abstract Precise compositional analyses at spatial resolution <1 μ m, combined with structure determination using bulk (i.e. powder XRD) and individual grain EBSD) techniques, show that both β-Fe x Se δ-Fe form as solids in a two-phase field above below the apparent peritectic temperature of 457 °C. Microstructures together via exsolution when cooled from this field; evident annealing time are optimised. Using facile one-pot method elemental Fe:Se reactant ratios ranging 0.95 to 1.14,...
Low activation isotopic boron (11B) based magnesium diboride (Mg11B2) superconductors doped with biomass-derived activated carbon were synthesized using 11B and powder via solid-state reaction. The effect of doping on the lattice structure superconducting properties Mg11B2 bulks evaluated X-ray diffraction, high resolution transmission electron microscopy, scanning microscopy magnetization measurements. Precise refinement structural parameters indicates successful substitution in bulks....
We propose a theory of longitudinal resistivity in the normal phase quasi-one-dimensional organic superconductors near quantum critical point where antiferromagnetism borders with superconductivity under pressure. The linearized semi-classical Boltzmann equation is solved numerically, fed by half-filling electronic umklapp scattering vertex as derived from one-loop renormalization group calculations for electron gas model. momentum and temperature dependence has an important impact on...
THz/Far infrared synchrotron absorption experiments on pure and doped MgB 2 samples show that the spectral weight at low wavenumber ( i.e. , <110 cm −1 ) evolves as temperature is reduced to 10 K.
We demonstrate synthesis of the ternary intermetallic MgNi3B2 using autogenous pressure from reaction NaBH4 with Mg and Ni metal powder. The decomposition to H2 B2H6 commences at low temperatures in presence and/or promotes formation Ni-borides increase temperature. aggregates Ni-boride cores are formed when temperature is >670 °C >1.7 MPa. Morphologies microstructures suggest that solid–gas liquid–gas reactions dominant mechanisms form a lower than MgNi3B2. Magnetic measurements...