Materials Literature
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We study the nature of (001) surface states in Pb_{0.73}Sn_{0.27}Se in the newly discovered topological-crystalline-insulator (TCI) phase as well as the corresponding topologically trivial state above the band-gap-inversion temperature. Our calculations predict not only metallic surface states with a nontrivial chiral…
We investigate one of the most common analytic continuation techniques in condensed matter physics, namely the Padé approximant. Aspects concerning its implementation in the exact muffin-tin orbitals (EMTO) method are scrutinized with special regard towards making it stable and free of artificial defects. The electron…
The range of the accuracy of scalar diffraction theory and effective medium theory for binary rectangular groove phase grating is evaluated by the comparison of diffraction efficiencies predicted from scalar theory and effective medium theory, respectively, to exact vector results calculated by Fourier modal method. T…
The design of the interplay between light and nanomaterials by the effect of localized-surface-plasmon resonance in metallic nanostructures is a fascinating subject, and recently, a lot of research has been carried out from both fundamental and applicational points of view. In this paper, we demonstrate the theories f…
The purpose of this study was to evaluate quantitatively the effects of fluoride on the solubility and crystallinity of carbonated apatites (CAPs) after its incorporation into the crystal lattice using the metastable equilibrium solubility (MES) distribution method. Fluoride-incorporated CAPs (F-CAPs) of two different…
Graphenic material synthesized by the University of Idaho Thermolyzed Asphalt Reaction (GUITAR) was characterized by cyclic voltammetry. Despite morphological similarities, GUITAR maintains distinct characteristics as an electrode material versus graphene, graphite, pyrolytic graphite and highly ordered pyrolytic grap…
The magnetism of undoped ZnS nanotetrapods, synthesized by a solvothermal method, has been investigated by magnetization measurements and first principle numerical calculations. The background magnetic impurity concentrations of Fe, Co and Ni were determined at ppm level by inductively coupled plasma mass spectrometry…
We employ nanoindentation coupled with electrical contact resistance measurements for simultaneous characterization of the electrical and mechanical behaviors of a cellular assembly of carbon nanotubes (CNTs). Experimental results reveal two different responses that correspond to relatively dense and porous regions of…
Electrospray ionization (ESI) mass spectrometry (MS) is a widely used tool for the characterization of organometallic nanoclusters. By matching experimental mass spectra with calculated isotope distributions it is possible to determine the elemental composition of these analytes. In this work we conduct ESI-MS investi…
Electrospinning of hydroxyapatite (HA)/polyvinyl butyral solution resulted in the formation of fibers with average diameter of 937-1440 nm. These fibers were converted into HA nanoparticles with size <100 nm after undergoing calcination treatment at 600°C. The diameter of the fiber was found to be influenced by applie…
This paper extends the work of Lewin et al., which showed that high levels of flame retardancy could be conferred on polyamide 6 (PA6) in the presence of small concentrations of ammonium sulphamate (AS) and dipentaerythritol (DP). PA6 samples were compounded with similarly low concentrations (2.5%w/w AS and 1%w/w DP)…
The ordering transition of an amorphous carbon layer into graphene was investigated by high-temperature scanning tunneling microscopy. A disordered C layer was prepared on a Ru(0001) surface by chemical vapor deposition of ethylene molecules at ~660 K. The carbon layer grows in the form of dendritic islands that have…
An architecturally designed nanowall-shaped MgO (nanowall MgO) was fabricated by the combination of nanoimprint lithography (NIL) and pulsed-laser deposition (PLD). The sidesurface on the nanowall MgO exhibited (111) facets with edge truncation instead of the most stable (100) face when the aspect ratio between the he…
We report the hydrogenation-assisted unzipping of multiwall carbon nanotubes grown on silicon substrates. Carbon nanotubes are formed using hydrogen and acetylene or methane in a direct-current plasma enhanced chemical vapor deposition chamber at a temperature of 650 °C. By patterning the nickel prior to the growth of…
We report on the formation, structure, composition, and reduction of NiO-MgO and CoO-MgO solid oxide solution thin films supported on a Mo(100) substrate. By use of a combination of grazing and normal emission X-ray photoelectron spectroscopy (XPS), scanning tunneling microscopy (STM), and density functional theory ca…
Thermoresponsive characteristics of oligo(ethylene glycol) derivatives of lithocholic acid (LCA) depend on the hydrophilic/hydrophobic balance of the compounds. Below a threshold temperature (∼30 °C), one of the derivatives, LCA(EG(4))(2), self-assembles in water into hollow nanotubes that form thixotropic gels at hig…
A decapeptide sequence derived from the blue mussel protein (mefp 1) was modified in order to study the effect of the sequence length and the content of the amino acid 3,4-dihydroxyphenylalanine (DOPA) on the peptides adsorption properties. These modifications involved varying DOPA content (n = 0; 1; 2; 4) and varying…
We present computer simulation results of the layer by layer self-assembling process of colloidal particles. We have generated five multilayer structures of monodisperse spherical particles according to a generalized model of random sequential adsorption of hard spheres. The multilayers, each created at a different si…
A conformal cubical transformation-based metamaterial invisibility cloak is presented and verified, in the near and the far field, by a rigorous full-wave numerical technique based on a higher-order, large-domain finite element method, employing large anisotropic, continuously inhomogeneous generalized hexahedral fini…
In this study, low-density polyethylene (LDPE)–thermoplastic corn starch blends containing various amounts of organomodified montmorillonite (OMMT, 0.5–3 part per hundred (phr) resins) were prepared using a twin screw extruder. A 3-wt% LDPE-grafted maleic anhydride was used as a compatibilizer. The tensile, flow and w…