Materials Literature
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Thermal strain effect on the piezoelectricity was investigated for (Na,Bi)TiO3−BaTiO3 (NBT−BT) thin films on various substrates with (100) and (110) orientations. The compressive-thermal strain caused an increase in the remnant polarization unaccompanied by a decrease in dielectric permittivity, which resulted in enha…
The issue of phase segregation, inherent to the MgZnO alloy system, was investigated via selective resonant Raman scattering. We demonstrate that it is a highly sensitive technique for the detection of embedded structural inhomogeneities. MgZnO thin-films with bandgaps that span the UV-range of 3.2–5.7 eV were realize…
Emulsion inversion, from water-in-oil (w/o) to oil-in-water (o/w), was accomplished by employing tetrahydropyran-containing ligands that undergo facile deprotection, converting the nanoparticles from hydrophobic to hydrophilic. These ligand-tailored nanoparticles were used to prepare w/o emulsions that were disrupted,…
A Schiff base ligand derived from 5-bromo-2-hydroxybenzaldehyde and 2,2′-dimethylpropylenediamine (H 2 L) and its corresponding dioxomolybdenum(VI) complex (Mo(O) 2 L) has been synthesized and characterized by spectroscopic methods. The adsorption of Mo(O) 2 L on the surface of silica-coated magnetite nanoparticles vi…
We present extensions to our previous work on Fukui functions and linear-response functions [W. Yang, A. J. Cohen, F. D. Proft, and P. Geerlings, J. Chem. Phys. 136, 144110 (2012)]. Viewed as energy derivatives with respect to the number of electrons and the external potential, all second-order derivatives (the linear…
Only 10 seconds: Hydrocarbons and water do not mix under standard conditions, but they do mix freely at high temperature and high pressure near the gas/liquid critical point of water (Tc=374 °C, Pc=22.1 MPa). Quenching of homogeneous solutions of dodecane and water at such extreme conditions in the presence of a surfa…
All-Organic Electrochemical Transistors (OECTs) realized by employing Poly(3,4-EthyleneDiOxyThiophene) doped with Poly(Styrene Sulfonate) as conductive polymer show a dependence of their behavior on the gate to channel area ratio. This peculiarity has been investigated and the working mechanism has been explained in v…
The achievement of a reproducible and controlled deposition of partitioned Cu2O/CuO thin films by techniques compatible with ULSI processing like reactive magnetron sputtering has been reported as an outstanding challenge in the literature. This phase partitioning underlies their performance as reversible resistive me…
We have investigated magnetic-field ($H$\ensuremath{\parallel}[100]) effect on a spin-frustrated tetragonally distorted spinel Mn${}_{3}$O${}_{4}$ by measurements of magnetization, dielectric constant, and strain as well as synchrotron x-ray and neutron diffraction. In two low-temperature phases below 40 K, long-wavel…
In many bacteria the flavoenzyme thymidylate synthase ThyX produces the DNA nucleotide deoxythymidine monophosphate from dUMP, using methylenetetrahydrofolate as carbon donor and NADPH as hydride donor. Because all three substrates bind in close proximity to the catalytic flavin adenine dinucleotide group, substantial…
Thermal rectification requires that thermal conductivity not be a separable function of position and temperature. Investigators have considered inhomogeneous solids to design thermal rectifiers but manipulations of solid lattices are energy intensive. We propose a thermal logic device based on asymmetric solid-fluid r…
We report on zinc oxide (ZnO) nanoparticle-based transistors in which the solution-processed semiconducting layers are post-treated using UV light irradiation instead of high temperature annealing. Field-effect transistors based on these ZnO nanoparticle films exhibit n-channel characteristics with electron mobilities…
A CuAlO2 Schottky diode was fabricated and investigated using current density-voltage (J-V) and capacitance-voltage (C-V) methods. It is shown that the barrier height (qϕB) determined from J-V measurements is lower than that determined from C-V measurements and qϕB determined from C-V measurements is close to the Scho…
Summary Blends of starch with polyesters have commonly been used in the production of biodegradable films. However, the components in the blend are not always miscible; therefore, the use of compatibilisers is recommended. The objective of the present work was to study the compatibilisation effect of adipic acid (0.5%…
The fabrication process for 5 Tb/in(2) bit patterns using solvent-assisted directed self-assembly is investigated. The N-methyl-2-pyrrolidone solvent vapor-annealing method was used to achieve good long-range lateral ordering of low-molecular-weight polystyrene-block-polydimethylsiloxane with a lattice spacing of 11 n…
We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQD's bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion effici…
The effects of irradiation by X rays and protons on the dielectric and piezoelectric response of highly (100)-textured polycrystalline Pb(ZrxTi1−x)O3 (PZT) thin films have been studied. Low-field dielectric permittivity, remanent polarization, and piezoelectric d33,f response all degraded with exposure to radiation, f…
Gegenelektroden in Sonntagsschrift: Die Anwendung von Nanokristallen (NCs) aus Pyrit (FeS2) als Tinte zum Aufbau einer Gegenelektrode bietet eine Alternative zum Einsatz von Pt in Farbstoffsolarzellen. Die FeS2-NC-Tinte ist hervorragend elektrokatalytisch aktiv und elektrochemisch bemerkenswert stabil. ITO=indiumdotie…
Achiral unsymmetrical 2-methyl 3-amino-benzoic acid (2,6-substituted toluene)-derived four-ring bent-core liquid crystals with a polar fluoro or chloro substituent at one end and an alkyloxy group (butyl to dodecyl) at the other end have been synthesised by a simple and straightforward synthetic method. The molecular…
BST –ZnO–B 2 O 3 –composite thick films have been investigated regarding their suitability as low‐temperature sintered tunable microwave dielectrics. The investigations showed that already a small amount of Z nO–B 2 O 3 additive can remarkably reduce the sintering temperature down to 900°C. Microstructural investigati…