Materials Literature
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(K 0.5 Na 0.5 )NbO 3 ( KNN ) thin films have been deposited onto Pt/Ti/SiO 2 /Si and quartz substrates by RF magnetron sputtering. The films were deposited at 400°C with the variation in oxygen mixing percentage ( OMP ) ratio from 0% to 100% and annealed at 700°C in oxygen atmosphere. The crystallinity of the films is…
The formation of a porous SiC‐depleted region in ZrB 2 –SiC due to active oxidation at ultrahigh temperatures was characterized. The presence/absence of SiC depletion was determined at a series of temperatures (1300°C–1800°C) and times (5 min–100 h). At T < 1627°C, SiC depletion was not observed. Instead, the formatio…
Porous oxide matrix composites typically develop significant numbers of matrix cracks during processing. Eliminating such cracks will lead to improved matrix‐dominated properties and will also provide a significant step toward producing a dense oxide matrix composite. However, attaining a crack‐free oxide matrix compo…
Atomic scale computer simulations using density functional theory were used to investigate the behaviour of tin in the tetragonal phase oxide layer on Zr-based alloys. The Sn-Zr(x) defect was shown to be dominant across most oxygen partial pressures, with Sn-Zr '' charge compensated by V-O(center dot center dot) occur…
High Resolution Image Download MS PowerPoint Slide Compositionally complex materials can be prepared as nanocrystals with defined shapes by aerosol-assisted molten salt synthesis (AMSS), where the aerosol phase spatially and temporally confines crystal growth. Here, single-crystalline CoFe 2 O 4 nanoplates and CoFe 2…
Hydrophobins are extracellular proteins produced by filamentous fungi. They show a variety of functions at interfaces that help fungi to adapt to their environment by, for example, adhesion, formation of coatings, and lowering the surface tension of water. Hydrophobins fold into a globular structure and have a distinc…
TRISO particles, a composite nuclear fuel built up by ceramic and graphitic layers, have outstanding high temperature resistance. TRISO fuel is the key technology for High Temperature Reactors (HTRs) and the Generation IV Very High Temperature Reactor (VHTR) variant. TRISO offers unparalleled containment of fission pr…
A novel BaTiO 3 –Na 0.5 Bi 0.5 TiO 3 –Nb 2 O 5 –NiO ( BT ‐ NBT ‐Nb‐Ni) system that meets the X8R specification (−55°C–150°C, Δ C / C ≤±15%) of multilayer ceramic capacitors ( MLCC s) was fabricated, with a maximum dielectric constant of 2350 at room temperature (25°C). Core–shell microstructure was observed by transmi…
The evolution of microstructure and texture of an α-Zr alloy during thermomechanical processing was investigated, starting from the β-quenched microstructure. The material was rolled at 550 °C to reductions of 10, 20, 40 and 60%, and held at 550 °C for 24 h. EBSD was used to measure the texture at the different reduct…
We employ Monte Carlo simulations to investigate the self-assembly of patchy colloidal dumbbells interacting via a modified Kern-Frenkel potential by probing the system concentration and dumbbell shape. We consider dumbbells consisting of one attractive sphere with diameter sigma(1) and one repulsive sphere with diame…
The effect of the exposure of wheat (Triticum aestivum) seeds to silver, copper and iron nanoparticles on germination and seedling vigor index has been studied under laboratory conditions. Seeds were exposed to silver, copper and iron nanoparticles under various conditions. Germination percentage and root shoot length…
Recently, it has been shown that silver nanoparticles (AgNPs) provide a unique approach to the treatment of tumors, especially those of neuroepithelial origin. Thus, the aim of this study was to evaluate the impact of AgNPs on proliferation and activation of the intrinsic apoptotic pathway of glioblastoma multiforme (…
Heteronanostructured zinc oxide nanorod (ZnO NR) array are vertically grown on polydimethylsiloxane (PDMS) through a hydrothermal method followed by an in situ deposition of silver nanoparticles (Ag NPs) through a photoreduction process. The Ag-ZnO heterostructured nanorods on PDMS are measured with an average diamete…
Autologous graft is considered the gold standard of graft materials; however, this approach is still limited due to both small amount of tissue that can be collected and to reduced cell viability of cells that can be obtained. The aim of this preliminary study was to demonstrate the efficacy of an innovative medical d…
There has been strong, ongoing interest over the past decade in developing strategies to design and engineer materials with tailored optical properties. Fractal-like nanoparticles and films have long been known to possess a remarkably broad-band optical response and are potential nanoscale components for realizing spe…
Picosecond switching of the staggered antiferromagnetic order is shown to be realizable through spin-transfer torques from a short current pulse. The coupled dynamics of sublattice magnetization is mapped onto a classical pendulum subject to gravity and a driving pulse, where switching occurs if the pendulum acquires…
We present a first-principles computer code package (ABACUS) that is based on density functional theory and numerical atomic basis sets. Theoretical foundations and numerical techniques used in the code are described, with focus on the accuracy and transferability of the hierarchical atomic basis sets as generated usi…
Certain localised displacement fluctuations in the planar honeycomb lattice may be identified as precursors to topological defects. We show that these fluctuations are among the most pronounced {\em non-affine} distortions of an elemental coarse graining volume of the honeycomb structure at non zero temperatures. We o…
Comparing with the conventional semiconductors, the choice of the two dimensional semiconductor (2DSC) materials is very limited. Based on proper electron counting, we propose a large family of 2DSCs, all adopting the same structure and consisting of only main group elements. Using advanced density functional calculat…
Because of increasing environmental concerns/legislative pressure for plastics waste and rapid increases in the cost of petroleum, the development of "environmental friendly" materials has attracted extensive interest. Recently, bioplastics are one of the most innovative environmental friendly materials developed. The…