Materials Literature
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A straight forward approach to increase proton conductivity at relatively dry conditions is to increase the number of sulfonic acid groups in the polymer. Although various PFSAs of significantly lower EW can be prepared, the limitation of this approach is that the polymer and membrane properties are also affected, wit…
Two different buffer layers (Ta/Ru/Ta and thick Ta) were tested for MgO MTJs. The influence of buffer layer texture on the crystallization of CoFeB bottom and top electrodes and on the tunnel magnetoresistance effect was investigated. X-ray results suggest that, after anneal, the CoFeB layer above MgO is well (200) te…
Solvothermal treatment of copper halides and 3-amino-5-mercapto-1,2,4-triazole (H2amtz) produced three isostructural complexes [Cu31X4(H1.55amtz)24](SO4)8·xDMF [X = Cl, Br and I, x ∼ 32], which show 3-D networks with bor topology constructed by Cu-centered CuCu4 tetrahedra and CuCu3 triangles with an acentric cubic su…
The unidirectional anisotropy constant, JK, of the Mn76Ir24/FM (FM =Ni-Co, Co-Fe, Fe-Ni) bilayers was investigated, systematically changing the FM layer composition. On the (111)-oriented face centered cubic (fcc) Mn-Ir layer, the FM layers were grown in the respective crystal structure, corresponding to their composi…
In this paper, we report an enhancement of the anisotropy constantKAFof IrMn/CoFe exchange bias systems with the variation of the NiCr seed layer thickness. This is related to an increase in the (111) texture of IrMn parallel to the interface. Silang100rang /NiCr (Xnm)/IrMn (7 nm)/CoFe (3 nm)/Ta (10 nm) withX= 2, 4, 6…
We studied the magnetic and magnetoresistance characteristics of pseudospin-valve magnetic tunnel junctions (MTJs) based on CoFe/Pd multilayer electrodes with perpendicular magnetic anisotropy and an MgO barrier. The MTJs at annealing temperature (Ta) of 473 K showed a tunnel-magnetoresistance (TMR) ratio of 1.5%. An…
Co/Cu multilayer nanowires fabricated in an array using anodized aluminium oxide (AAO) template has been investigated. Experimental conditions are optimized to fabricate Co/Cu multilayer systems with fixed Cu and variable Co layer thicknesses. Magnetization reversal mode is found to depend on the Co layer thickness. A…
Glassy carbon electrodes functionalised with two redox centres have been prepared by using electrochemical and solid-phase synthetic methodologies. Initially the individual coupling of anthraquinone, nitrobenzene and dihydroxybenzene to a glassy carbon electrode bearing an ethylenediamine linker was optimised by using…
The optimum temperature of rapid thermal nitridation (RTN) of Si substrates was investigated for minimizing an equivalent oxide thickness (EOT) of an interfacial layer (IL) which was grown between HfO 2 and Si of Pt/SrBi 2 Ta 2 O 9 (SBT)/HfO 2 /Si ferroelectric-gate field-effect transistors (FeFETs) during a post-anne…
IDEAL-Cell is a new concept of a high temperature fuel cell operating in the range 600-700 {degree sign}C. It is based on the junction between the anode part of a PCFC and the cathode part of a SOFC through a mixed H+ and O2- conducting porous ceramic membrane. This concept, extensively described in the present paper,…
The proton conductivity and water uptake were measured for a series of 3M ionomer membranes with various equivalent weights (EWs) and different acid groups. For the EW variation, the conductivity of PFSA samples with EW as low as 580 g/eq were studied. Results show that conductivity increases with decreasing EW. In pa…
BACKGROUND: Enzymes are classified in a numerical classification scheme introduced by the Nomenclature Committee of the IUBMB based on the overall reaction chemistry. Due to the manifold of enzymatic reactions the system has become highly complex. Assignment of enzymes to the enzyme classes requires a detailed knowled…
In traction systems, it is usual to connect reactances in delta configuration with single-phase loads to reduce voltage unbalances. This set is called a Steinmetz circuit. Parallel and series resonances can occur between the Steinmetz capacitor and system inductors, increasing harmonic voltage distortion. It is import…
Static and dynamic properties of single-component perfluoropolyether (PFPE) lubricants have been studied for optimal lubricant selection by examining the molecular conformations that influence the thickness and the mobility for the self-healing capability in lubricant nanofilms. In this paper, we examine the physioche…
The aim of this study was to scale-up and optimize the chitosan (CS) microparticles (MPs) from 1x batch (41-85 mg) to 4x batch (270-567 mg) to be used in bone regeneration. The MPs used in the present study were prepared by double emulsification technique using CS as a base material under physiologically friendly cond…
In this paper, the magnetic material characteristics are reconstructed for magnetic circuits with non-uniform electromagnetic field patterns, including excitation winding and/or air gaps, as in the case of rotating electrical machines. The identification process is done using a set of well chosen global and/or local m…
A relationship between boron (B) diffusion into the MgO barrier and pinhole creation in CoFeB/MgO/CoFeB-magnetic tunnel junctions (MTJs) was investigated. The diffused B in the MgO layer was identified by secondary ion mass spectrometry for the MTJs annealed at 350degC , which provide the giant magnetoresistance (TMR)…
The inclusion of NH(4)(+) as counterions in Car-Parrinello molecular dynamics (CPMD) simulations of anionic uranyl(VI) complexes is proposed as a viable approach to modeling "real" aqueous solutions. For [UO(2)F(4)(H(2)O)](2-) in water, it is shown that the inclusion of two NH(4)(+) ions strengthens the bond between u…
A direct carbon solid oxide fuel cell (DC-SOFC) was assembled and tested. The cell was a tubular SOFC-like structure, using YSZ as electrolyte, silver paste as anode and cathode, and graphite as fuel. At the testing temperature 800{degree sign}C, the open circuit voltage of the cell was 0.85V and the maximum power rea…
To examine the influence of the barrier quality in fully epitaxial Fe/MgO/Fe(001) magnetic tunnel junctions (MTJs), we propose to use Fe-V alloys as magnetic electrodes. This leads to a reduced misfit with MgO. We actually observe, by high-resolution electron microscopy (HREM) and local strain measurements, that the m…