Materials Literature
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We derive the mode spectrum of the thermal boundary resistance between two bodies having a temperature difference ΔT. A general expression of the time τ that defines the resistance is derived as the equilibrium autocorrelation of ΔT integrated over time. A further decomposition of this autocorrelation yields the resis…
Perovskite-type Nd1−xLaxCrO3 (0≤x≤1.0) polycrystalline samples were synthesized using solid state reaction. Structural studies indicate that the lattice parameters, metal–oxygen bond lengths, and angles of Nd1−xLaxCrO3 strongly depend on the La content. Two magnetic transition temperatures, Cr3+ antiferromagnetic orde…
To generate bioactive coatings for medical implants, a novel procedure has been developed using a coating of mesoporous silica for controlled drug delivery. Plain glass slides were used as substrates. The mesoporous coatings were then loaded with the antibacterial drug ciprofloxacin. The drug release kinetics were inv…
We investigated the valence band structure of graphite oxide by photoelectron spectroscopy at the Pohang Accelerator Laboratory, Korea. The typical sp 2 hybridization states found in graphite were also seen in graphite oxide. However, the π state disappeared near the Fermi level because of bonding between the π and ox…
The Reduced Enrichment for Research and Test Reactors (RERTR) program develops advanced nuclear fuels for high-power test reactors. Monolithic fuel design provides higher uranium loading than that of the traditional dispersion fuel design. Hot isostatic pressing is a promising process for low-cost batch fabrication of…
Polymeric materials are complex samples, as they contain various groups of additives, compounding ingredients, and fillers. An important group of additives are stabilizers. Efficient stabilization is essential especially for polypropylene, as it is sensitive to oxidation and radical attack due to the numerous tertiary…
We investigate the effect of asymmetric grain boundaries (GBs) on the shock response of Cu bicrystals with molecular dynamics simulations. We choose a representative Σ3⟨110⟩ tilt GB type, (110)1/(114)2, and a grain size of about 15 nm. The shock loading directions lie on the GB plane and are along [001¯] and [221¯] fo…
In this work, we use molecular dynamics simulations to predict the thermal conductivities of perfect and nanoporous few-quintuple Bi2Te3 thin films. We find the dimensional crossover behavior of thermal transport and a minimum thermal conductivity at three quintuple layers at room temperature, and we attribute it to t…
Control of self-organization of nanofibers into regular clusters upon evaporation-induced assembly is receiving increasing attention due to the potential importance of this process in a range of applications including particle trapping, adhesives, and structural color. Here we present a comprehensive study of this phe…
Nanoparticles of elemental germanium have interesting optical and electronic properties and relatively low toxicity, making them attractive materials for biological and optoelectronic applications. The most common routes to colloidal Ge nanoparticles include metathesis reactions involving Zintl salts, hydride reductio…
CdS with triangular-like shape, nanorods, and multipods were synthesized via a solvothermal method by using dodecylamine as both solvent and surfactant. The decomposition of the cadmium-dodecylamine complex to form CdS nuclei is the key step for the synthesis of shape-determinant CdS. The cadmium concentration always…
An electrostatically tunable magnetoelectric inductor made of ring-type Pb(Zr,Ti)O3(PZT)/MnZn ferrite/Pb(Zr,Ti)O3(PZT) laminated composite has been developed. This tunable inductor worked in converse magnetoelectric effect, and with applying an electric field of 3 kV/cm, it exhibited a large inductance tunability of u…
First-principles calculations of electronic, optical, and vibrational properties of LaVO4 polymorph were performed with the density functional theory plane-wave pseudopotential method. The results of the electronic structure reveal that the different coordinated structure for monoclinic LaVO4 leads to an indirect band…
Nanotechnology is a multidisciplinary scientific field that deals with the formulation, preparation, characterization and application of structures, devices and systems at nanometric scale. Area of concern is interdisciplinary, but with peculiarities, among others, medicine, pharmacy, biophysics, electronics, bioengin…
The solution of the conventional Rayleigh–Plesset equation did not agree with the experimental results on the temporal variations of the sizes of cavitation bubbles produced by laser ablation in water. In this work, we modified the conventional Rayleigh–Plesset theory in the following two points to reproduce the exper…
The natural frequency of nanotubes with consideration of surface effects is studied using the nonlocal Timoshenko beam theory. This theory with long-range interactions revealing the nanoscale effect can be applied to study the vibration behavior of nanostructures. When the nonlocal effect is neglected in the analysis,…
Abstract Magnesium alloys present an alternative to medical cases in which polymeric sutures may not be ideal. To date, no efficient and low‐cost manufacturing process for the fabrication of magnesium‐based sutures can be found. To obtain an alternative, the previously characterised magnesium alloys ZEK100 (98% Mg), A…
The use of ionic liquid (IL) electrolytes promises to improve the energy density of electrochemical capacitors (ECs) by allowing for operation at higher voltages. Several studies have also shown that the pore size distribution of materials used to produce electrodes is an important factor in determining EC performance…
We review the energy spectrum and transport properties of several types of one-dimensional superlattices (SLs) on single-layer and bilayer graphene. In single-layer graphene, for certain SL parameters an electron beam incident on an SL is highly collimated. On the other hand, there are extra Dirac points generated for…
In situ polymerized polyimide/TiO2 (PI/TiO2) nanocomposite films with good electrical aging resistance are studied. Space charge distribution in the PI/TiO2 nanocomposite films are measured using the pulsed electroacoustic method. Dielectric properties of the films are measured in the frequency range of 102 Hz–106 Hz…