Materials Literature
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Inorganic semiconductors have properties that are notoriously difficult to control due to the deleterious impact of crystalline imperfections, and this is especially so in solar cells. In this work, it is demonstrated that materials grown using wet chemistry processes for the preparation of nanocristalline precursors…
The magnetization process of single crystalline GaV4S8 including tetrahedral magnetic clusters was measured in the magnetically ordered state below T C ≊ 13 K. Just below TC, steps were observed at very low fields of the order of 100 Oe, suggesting the competition of several intra- and inter-cluster interactions in a…
The effects of passivation on monocrystalline silicon solar cells were investigated. and films, prepared by atomic layer deposition and thermal oxidation, respectively, were used as passivation layers. Passivation using a monolayer yielded a cell efficiency of 17.5%. However, the bilayer structure drastically increase…
We report the synthesis of a cyclotriveratrylene-based molecular container and its distinctly different modes of complexation with dimethyldiazapyrenium and 4,4'-biphenylbisdiazonium ions.
This article investigates the breakdown of high-k/metal gate stacks under substrate injection regime. It is shown that it is initiated by a field driven breakdown of the interfacial layer (IL). Furthermore, because it is very sensitive to IL thickness variations, TBD optimization supposes a control of the high-k depos…
This study presents a novel microlens formation technology to implement a polymer ball lens in liquid medium. The highly symmetric ball lens is achieved due to the lower gravity influence in liquid. The microlens' diameter is controlled by the volume of the dispensed polymer. Moreover, it is easy to dispense, form, an…
A planar fuel cell stack is a layered structure consisting of repeated modules—membrane-electrode assemblies (MEAs) separated by bipolar plates (BPs). Generally, the distributions of voltage and temperature over the BP volume are described by three-dimensional Laplace equations. However, the thickness of a BP is much…
Highly reactive N-polar [000−1] GaN surfaces were analyzed using spectroscopic ellipsometry. Following exposure to air, observed changes in the pseudodielectric function near the GaN band edge indicate that surface contamination reduces the band bending. A subsequent Ga adsorption/desorption experiment on pristine N-p…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. M. Gerez, M. Sanchez‐Carrilero, J. Salguero, M. Batista, M. Marcos; A SEM and EDS based Study…
The radioactivity concentrations in soil and water samples collected from 25 locations have been determined by using a gamma-ray spectrometry. Gamma-spectrometry measurements were made using a hyperpure germanium detector surrounded with shielding material to reduce the background counting rate. The EmcaPlus MCA emula…
Exploitation of the natural reserves of petroleum products has put a tremendous onus on the automotive industry. Increasing pollution levels and the depletion of the petroleum reserves have lead to the search for alternate fuel sources for internal combustion engines. Usage of vegetable oils poses some challenges like…
A dialkylamino-subtituted oligophenylenevinylene (OPV) derivative bearing a fullerene subunit (F–D) has been prepared. The electrochemical properties of F–D have been investigated by cyclic voltammetry. Whereas the first reduction is centered on the C60 unit, the oxidation is centered on the dialkylamino subunit of th…
Abstract— Darwin glass formed by impact melting, probably during excavation of the 1.2 km diameter Darwin crater, Tasmania, Australia. The glass was ejected up to 20 km from the source crater and forms a strewn field of >400 km2. There is at least 11,250 m3of glass in the strewn field and relative to the size of the c…
A technique is developed for the far field pattern analysis of reflectarrays, which is called 'element-in-array pattern' analysis technique. The technique rigorously takes the effects of mutual coupling between elements and the surrounding array environment into account by extracting the scattered fields of the elemen…
To expand the application of a drug in orally disintegrating tablets, the potential use of beta-cyclodextrin (beta-CyD) and 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) as excipients for the tablets containing dl-alpha-tocopheryl acetate (VE), an oily drug, was evaluated. HP-beta-CyD, not beta-CyD, solubilized VE i…
An array of microplasmas with sizes ranging from a millimeter to a micrometer, has potential for novel and promising electromagnetic-wave media, especially when the wave frequency is below the electron plasma frequency. Photonic crystals or band-gap materials composed of microplasmas have unique properties arising fro…
Pyrometallurgical reprocessing technology is currently being focused in many countries for closing actinide fuel cycle because of its favorable economic potential and an intrinsic proliferation-resistant feature due to the inherent difficulty of extracting weapons-usable plutonium. The feasibility of pyrometallurgical…
Abstract This paper describes the dynamic covalent assembly of three mono‐, bi‐ and trimacrocycles by utilizing hydrogen bonding‐driven zigzag anthranilamides as "leading" components. The monomacrocycle, a tetraamino molecule, was prepared from the [2+2] coupling reaction of a "U"‐shaped dialdehyde and a porphyrin dia…
We calculate the intrinsic Hall conductivity of conductions electrons coupled to a pyrochlore lattice of localized moments. In the presence of anisotropy the localized moments may order in a non-coplanar chiral structure, which can be at the origin of an intrinsic Hall effect. The sign and the value of the Hall conduc…
Using a pyridine amide ligand 4-methyl-2-{N-(2-pyridyl)carbamoyl}pyridine (HL), in its deprotonated form, binuclear mixed-valence homonuclear bimetallic complexes [CoIII,II2(L)3(X)]X·S [X = Cl (1); X = Br, S = CH3OH (2)] and heteronuclear bimetallic complex [CoIIIZnII(L)3(Cl)]Cl·CH3OH·5H2O (3) have been synthesized. S…