Materials Literature
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Non-destructive examination followed by high-heat-flux testing was performed for different small- and medium-scale mock-ups; this included the most recent developments related to actively cooled tungsten (W) or carbon fibre composite (CFC) armoured plasma-facing components. In particular, the heat-removal capability o…
Synthetic regrowth of ZnO nanowires [NWs] under a similar chemical vapor transport and condensation [CVTC] process can produce abundant ZnO nanostructures which are not possible by a single CVTC step. In this work, we report three different regrowth modes of ZnO NWs: axial growth, radial growth, and both directions. T…
The structure of ice samples formed in the decay of a water impurity gel at temperatures above 4 K and atmospheric pressure has been examined. The X-ray diffraction analysis indicates that three phases coexist in the initial sample at temperatures of 85–110 K. These phases are amorphous ice occupying up to 30% of the…
Magnetic properties of spatially ordered arrays of interacting nanofilaments have been studied by means of small-angle diffraction of polarized neutrons. Several diffraction maxima or rings that correspond to the scattering of the highly ordered structure of pores/filaments with hexagonal packing have been observed in…
Functional proteins designed de novo have potential application in chemical engineering, agriculture and healthcare. Metal binding sites are commonly used to incorporate functions. Based on a de novo designed protein DS119 with a βαβ structure, we have computationally engineered zinc binding sites into it using a home…
Although supercapacitors (SCs) offer many advantages over traditional secondary batteries, they have two major drawbacks-low specific energy and large voltage variations due to cycling. For SCs to be used as alternatives to batteries, a high efficiency power converter that can operate in a wide voltage range is requir…
A brief review of the main properties of multiorbital Hubbard models for the Fe-based superconductors is presented. The emphasis is on the results obtained by our group at the University of Tennessee and Oak Ridge National Laboratory, Tennessee, USA, but results by several other groups are also discussed. The models s…
Platinum/polymethylmethacrylate (Pt/PMMA) nanocomposite material was formed by low energy ion implantation of Pt into PMMA, and the transition from insulating to conducting phase was explored. In situ resistivity measurements were performed as the implantation proceeded, and transmission electron microscopy was used f…
Various theoretical and experimental 300 K equations of state of γ-B28, a new ultrahard high pressure orthorhombic phase of boron, have been reviewed. Throughout analyses and critical comparisons, it has been shown that DFT-GGA is capable of describing the EOS of γ-B28 very accurately and that the suggestion, in the l…
Arsenic-doped ZnO films were fabricated by radio frequency magnetron sputtering method at a relatively low substrate temperature of 200 °C. Post-growth annealing in air was carried out up to a temperature of 1000 °C. The samples were characterized by Hall measurement, positron annihilation spectroscopy (PAS), secondar…
The voltage hold-off capability of 95% alumina insulator in vacuum is usually less than that of a similar-sized vacuum gap and also is far below its dielectric breakdown strength, due to its low surface flashover strength. In this work, bulk doping was taken into consideration to modify the surface of 95% alumina in h…
We investigate performance, scaling, and reliability of 3D stacked multilayer graphene (s-MLG) as a new material candidate for carbon based interconnects, aiming to break through the limit of graphene monolayer in which electrical conduction and the associated wire scalability and reliability are largely hampered by i…
Before nitrogen can be used as a radiator for edge plasma temperature control in experiments with beryllium as the wall material, the compatibility of nitrogen-containing plasma with beryllium has to be tested. Therefore beryllium samples were exposed to a variety of mixed N 2 /D 2 plasmas in PISCES-B and codeposits f…
Experimental simulations of ITER transient events with relevant surface heat load parameters (energy density and pulse duration) as well as particle loads were performed with a quasi-steady-state plasma accelerator Kh-50 and pulsed plasma guns. Additional shielding was observed during irradiation of the combined carbo…
Pure and Ni (2 at.%) doped cadmium sulde (CdS) nanoparticles have been synthesized by chemical co-precipitation method at room temperature. Eect of Ni doping on CdS compound semiconductors has been analyzed using X-ray diractometer, transmission electron microscope, energy dispersive spectroscopy, Raman and optical ab…
We report periodic ab initio total energy calculations to predict equilibrium morphology of molecular crystals. The approach is based on the adsorption of molecules upon the underlying crystal surfaces rather than the attachment of two-dimensional slices of thickness of interplanar distance. It takes into account the…
We examine the evolution of a liquid drop on an inclined substrate oscillating vertically. The drop is assumed thin, and the oscillations are assumed weak and slow (the latter makes the liquid's inertia and viscosity negligible, so the drop's shape is determined by a balance of surface tension, gravity, and vibration-…
The aim of this study was to investigate the suitability of using water melon peels as alternatives to wood-based particleboard composites. The water melon peels composite boards were produced by compressive moulding using recycled low density polyethylene (RLDPE) as a binder. The RLDPE was varies from 30 to 70wt% wit…
This work reports on Raman scattering of rhodamine (R6G) molecules absorbed on either randomly distributed or grating-like arrays of approximately 8-nm Ag nanoparticles developed by inert gas aggregation. Optimal growth and surface-enhanced Raman scattering (SERS) parameters have been obtained for the randomly distrib…
The effects of tetravalent hafnium doping on the structural, transport, and magnetic properties of polycrystalline La1−xHfxMnO3 (LHMO) (0.05 ≤ x ≤ 0.3) were investigated systematically. LHMO exhibited a typical colossal magnetoresistance effect via the double-exchange between Mn2+ and Mn3+ ions, instead of that betwee…