Materials Literature
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The optical properties of V${}_{2}$O${}_{3}$ thin films are investigated across the insulator-to-metal transition and in the metallic state. The spectral weight transfer observed across the transition, over an energy scale of 5 eV, is consistent with the Mott-Hubbard model for correlated electron systems. In the metal…
We theoretically propose a multilayered polar-dielectric superlens system capable of sub-diffraction limited imaging simultaneously at different wavelengths. Our theory and simulation results show that this multilayered lens can fulfill a superlensing condition at multiple different wavelengths due to phonon resonance…
Development of large area polycrystalline diamond detectors for fast timing application of high-energy heavy-ion beams, F Schirru, B S Nara Singh, L Scruton, M A Bentley, S P Fox, A Lohstroh, P J Sellin, A Banu, M McCleskey, B T Roeder, E Simmons, A A Alharbi, L Trache, M Freer, D Parker
We have developed and tested two complementary methods for making time-lapse synchrotron X-ray diffraction (XRD) measurements of the growth of synthetic corrosion layers using a protocol for producing copper(I) chloride (nantokite), on copper as a test. In the first method, a copper coupon was spin-coated with saturat…
By using a Radio Frequency (RF) sputtering technique, Zn and ZnO nanostructures were fabricated on different substrates. ZnO nonorganics were synthesized on glass substrates, and Zn nanowires, ZnO nanoparticles and ZnO nanorods were synthesized on silicon substrates. The obtained ZnO nanograins ranging from 30 to 100…
Crystal bright: Ln3+-doped colloidal Ca1−xYxF2+x (x=0.28 and Ln=Eu and Tm/Yb) fluoride nanocrystals were prepared by using the thermal decomposition method. The XRD analysis confirmed the formation of pure cubic phase material. Eu3+-doped nanocrystals exhibited a quantum yield of 22 % whereas the Tm/Yb-doped nanocryst…
The field assisted sintering technique (FAST) is a high-amperage, low-voltage, powder consolidation technique that employs pulsed direct current and uniaxial pressure. Over the past several years, FAST has been successfully used to produce a variety of different materials including metals, composites, and ceramics. In…
Abstract Hollow polyaniline microspheres (HMsPANI) for supercapacitors were prepared successfully with sulfonated polystyrene microspheres as the template. The prepared electrode materials of HMsPANI consisted of nanoparticles and, thus, had a hierarchical structure. The electrochemical behaviors of the materials were…
Abstract This article describes a study on thermal behavior of poly(vinylidene fluoride‐chlorotrifluoroetheylene) [poly(VDF‐CTFE)] copolymers as polymeric binders of specific interest for high energy materials (HEMs) composites by thermal analytical techniques. The non‐isothermal thermogravimetry (TG) for poly (VDF‐CT…
A series of Mn/Al2O3, La-Mn/Al2O3 and Fe-La-Mn/Al2O3 catalysts were prepared by an impregnation method and investigated for selective catalytic reduction of NO with NH3 at low temperature. The experimental results revealed that NO conversion over La-Mn/Al2O3 was obviously improved after La doping. Addition of Fe incre…
The study describes a design of experiment analysis performed on hybrid polymeric composites reinforced with unidirectional banana fibres and silica microparticles. Maleic anhydride was also evaluated as a chemical additive to improve the adhesion between phases. A full factorial design (2 2 3 1 ) and the analyses of…
Abstract The glass transition temperature (T g ) of acrylated triglycerides was clearly a function of the level of acrylation of triglyceride‐based polymers and was modeled using simple empirical relationships. We began by calculating the distribution of unsaturation sites in plant oils. We assumed a binomial distribu…
Abstract N N –Pt II –bis(acetylide) complexes [ N N = 4,4′‐bis( tert ‐butyl‐2,2′‐bipyridine) (dbbpy)] with ethynylpyrene ( Pt‐2 ) or 4‐ethynyl‐1,8‐naphthalimide ligands ( Pt‐3 ) that show long‐lived 3 IL triplet excited states ( τ T = 118.0 μs) were used as new triplet sensitizers for triplet–triplet annihilation (TTA…
NiO6-octahedral tilts in ultrathin LaNiO3 films were studied using position averaged convergent beam electron diffraction (PACBED) in scanning transmission electron microscopy. Both the type and magnitude of the octahedral tilts were determined by comparing PACBED experiments to frozen phonon multislice simulations. I…
Biocompatible polyesters were prepared from isosorbide, various aliphatic diacid via a simple non-solvent polycondensation with a low toxicity catalyst. The successful synthesis of the polyesters was confirmed by gel permeation chromatography, (1)H-nuclear magnetic resonance and Fourier transform infrared spectroscope…
Nephrogenic systemic fibrosis is a progressive, potentially fatal, multiorgan-system fibrosing disease related to exposure of patients with renal failure to gadolinium-based contrast agents used in magnetic resonance imaging. Between 1997 and 2007, more than 500 cases of nephrogenic systemic fibrosis in patients with…
The production of high-performance carbon nanotube (CNT) materials demands understanding of the growth behavior of individual CNTs as well as collective effects among CNTs. We demonstrate the first use of grazing incidence small-angle X-ray scattering to monitor in real time the synthesis of CNT films by chemical vapo…
Abstract Alumina hydrates were prepared by the wet chemical method under different pH values and subsequently calcined through both conventional and microwave heating approaches. After calcination at 500 °C for 2 h, amorphous precursor was partially transformed to α-alumina. NH 4 NO 3 remaining in the dried precursor…
Plasmonic light absorption properties of three-layered Au–Ag bimetallic nanoshells are investigated using the quasi-static electricity and plasmon hybridization theory. Comparing with Au-dielectric-Au and Ag-dielectric-Au multilayer nanoshells, Au-dielectric-Ag multilayer nanoshells are demonstrated more suitable for…
We present an analysis of the dynamics of single-walled carbon nanotube (SWCNT) chirality during growth, using the recently developed local chirality index (LOCI) method [ Kim et al. Phys. Rev. Lett. 2011 , 107 , 175505 ] in conjunction with quantum chemical molecular dynamics (QM/MD) simulations. Using (5,5) and (8,0…