Materials Literature
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The production and use of iron oxide nanoparticles are growing exponentially due to its wide applications in different fields of science and technology. The objective of this study is to synthesize iron oxide nanoparticles, and modification of its surface to make it less toxic. The iron oxide nanoparticles were synthe…
Radiosensitizers can increase the local treatment efficacy under a relatively low and safe radiation dose, thereby facilitating tumor eradication and minimizing side effects. Here, we report a new class of radiosensitizers that contain several gold (Au) atoms embedded inside a peptide shell (e.g., Au10-12(SG)10-12) an…
We demonstrate optically stable amorphous silicon nanowires with both high nonlinear figure of merit (FOM) of ~5 and high nonlinearity Re(γ) = 1200W-1m-1. We observe no degradation in these parameters over the entire course of our experiments including systematic study under operation at 2 W coupled peak power (i.e. ~…
In earlier papers the authors have shown by XRD measurements and HRTEM imaging/SAED (selected area electron diffraction)/STEM imaging/EDS X-ray spectra that erbium or erbium/ytterbium-enriched nano-crystals are formed in erbium doped and erbium/ytterbium co-doped oxy-fluoride glass-ceramics fibers by their controlled…
We present characterization of Ba(Fe 1−x Co x ) 2 As 2 thin film using a magneto-optical Kerr effect setup based on photoelastic modulation. The magneto optical technique has been used to analyse the thickness and the temperature dependence of the magnetic properties of epitaxial Ba(Fe 1−x Co x ) 2 As 2 /Fe thin films…
In this work, we analyse the influence of C4+ irradiation with ion flounce of 3 × 1012 up to 2.3 × 1015 ion·cm−2 on significant enhancement of the critical current density, Jc , in BaFe1.9Ni0.1As2 single crystals. Jc was increased from 0.61 × 105 up to 0.94 × 105 A/cm2 at T = 10 K and H = 0.5 T. BaFe1.9Ni0.1As2 single…
New 3,5-disubstituted-4-amino-1,2,4-triazole derivative, namely 3,5-di(4-tolyl)-4-amino-1,2,4-triazole (4-DTAT) was synthesised and its inhibitive action against the corrosion of mild steel in 1 M HCl solution was investigated at 308 K. The detailed study of 4-DTAT was been performed using gravimetric measurements and…
Thermally stable mesoporous TiO2/SiO2 hybrid films with pore size of 50nm have been synthesized by adopting the polymeric micelle-assembly method. A triblock copolymer, poly(styrene-b-2-vinyl pyridine-b-ethylene oxide), which serves as a template for the mesopores, was utilized to form polymeric micelles. The effectiv…
A series of Ag-doped GdBaCuO superconducting films were prepared by low fluorine MOD process on buffered Hastelloy substrates. The effects of Ag doping on the microstructures and superconducting properties of GdBCO thin films were investigated. It was found that an optimum addition of about 5 mol % Ag lead to better c…
The large atomic-size mismatch between In and Ga and the large lattice-mismatch strain between InAs and GaAs make the InAs/GaAs (001) growth interface a complex alloy system, the understanding of which can enhance control of device synthesis and nanostructure self-assembly. We present a detailed first-principles analy…
Pb1−yBiySr2Y1−xCaxCu2O7+δ (PbBi1212) single-crystal thin films have been grown on SrTiO3 (100) substrates by the ex-situ growth method in which an amorphous film is annealed at 970 °C in a closed ceramic container made of the same material as the film. It is found that PbBi1212 exhibits superconductivity when the Ca c…
Electrostatic discharges (ESDs) due to the collision of charged metals cause serious malfunctions in high-tech information devices. In particular, the fast collision provides severe ESD events, while the mechanism has not fully been elucidated, though the approach speed is known to affect a spark length. In this study…
We report a new sample synthesis technique for polycrystalline (Ca 1− x Na x )Fe 2 As 2 (0< x ≤0.6) and measurements of an iron isotope effect in optimally doped (Ca 0.4 Na 0.6 )Fe 2 As 2 with three types of iron isotopes ( 54 Fe, natural Fe, and 57 Fe). We synthesized isotope samples carefully not to give rise to a d…
This thesis explores deposition of amorphous thin films based on the two transition metal nitride systems, TiN and HfN. Additions of Si, Al and B have been investigated using three different deposition techniques: dc magnetron sputtering, cathodic arc evaporation, and high power impulse magnetron sputtering (HIPIMS).…
Low temperature detectors operated at about 0.1K have achieved excellent spectral performances in the soft X-rays, becoming appealing for new challenging measurements with space missions in Astrophysics. In order to exploit their full sensitivity, it is necessary to minimize the background signals generated by the cos…
Twisting of multi-filamentary superconductors is an important step in the development of wires with AC losses at an acceptable level for AC applications. The necessary twist pitch depends on wire architecture, critical current density, matrix material, and external factors such as temperature, frequency and applied ma…
Among the myriad microfabrication approaches, Deep X-ray Lithography (DXRL) takes advantage of the high penetration depth of hard X-rays. For the first time, this feature has been exploited for the precise control of surface chemical functionalities on a thick porous ceramic material. As a proof of concept, porous alu…
The performance of multi-layered super insulation in cryogenic systems is highly dependent on the radiative properties of reflector foil surfaces. Aluminum coated polyester foils are utilized for their high reflectivity in the infrared spectrum. This coating is an electrical conductor and in applications with variable…
We report on comparative study of magnetic phase diagram and critical current of the hole- and electron-doped BaFe 2 As 2 single crystals with close values of superconducting critical temperature, T c , (slightly underdoped Ba 0.64 K 0.36 Fe 2 As 2 with T c =25K and optimally doped BaFe 1.9 Ni 0.1 As 2 with T c =20K)…
Optical properties of Pr3+ ions in lead-free germanate glasses modified by BaF2 were investigated. Luminescence bands related to 3P0 → 3H4, 3P0 → 3H5, 1D2 → 3H4, 3P0 → 3H6, 3P0 → 3F2 transitions of Pr3+ were registered under 450 nm excitation. The relative integrated luminescence intensities of 3P0 → 3H4 transition (b…