Materials Literature
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Our previous publications have demonstrated that thin glassy polymer films respond to highly sorbing penetrants, such as CO 2, quite differently than thick films. These studies focused on CO 2 permeation behavior and revealed that, for thin films, CO 2 permeability at constant CO 2 pressure goes through a maximum foll…
Water adsorption and decomposition on the low-index anatase TiO 2 surfaces were investigated by the periodic density functional theory calculations. The reaction pathway between water molecule adsorption and dissociative adsorption was determined by using the method of complete linear synchronous transit/quadratic syn…
Ordered mesoporous TiO 2 nanoparticles with amorphous pore walls were synthesized by a facile one pot template synthesis. The samples were heat treated at different temperatures under oxidizing (air), inert (N 2 ), and reducing (N 2 /H 2 ) conditions before removing the template under air atmosphere at 350 °C. The use…
Abstract This article examines the starch gelatinization and the blend morphology development in blends of thermoplastic starch (TPS) with high‐density polyethylene, polypropylene, polystyrene, poly(lactic acid), and polycaprolactone. The TPS gelatinization and mixing with the second polymer was carried out on a twin‐…
The local structure of disordered jammed packings of monodisperse spheres without friction, generated by the Lubachevsky-Stillinger algorithm, is studied for packing fractions above and below 64%. The structural similarity of the particle environments to fcc or hcp crystalline packings (local crystallinity) is quantif…
We investigate the nucleation of ordered phases, their symmetries, and distributions in dense frictional hard sphere packings as a function of particle volume fraction ϕ, by imposing cyclic shear and constant applied pressure conditions. We show, with internal imaging, that the nucleating crystallites in the bulk cons…
Partial discharge (PD) online monitoring is an effective tool of inspecting insulation defects and identifying potential faults in power transformers. Ultra-high-frequency (UHF) approaches have caught increasing attention recently and been considered as a promising technology for online monitoring PD signals. The size…
Self-assembled plasmonic nanoparticle networks (PNN) composed of chains of 12 nm diameter crystalline gold nanoparticles exhibit a longitudinally coupled plasmon mode centered at 700 nm. We have exploited this longitudinal absorption band to efficiently confine light fields and concentrate heat sources in the close vi…
In this paper, we review recent progress and new challenges in the area of oxyfluoride perovskite, especially layered systems including Ruddlesden-Popper (RP), Dion-Jacobson (DJ) and Aurivillius (AV) type perovskite families. It is difficult to synthesize oxyfluoride perovskite using a conventional solid-state reactio…
Solution-mediated polymorphic transformations (SMPT) of the pharmaceutical compounds carbamazepine and piracetam have been investigated. Seeded transformation experiments were performed, and the solution concentration was monitored by in situ infrared spectroscopy using a calibration free method. Solid samples were al…
A new concept in which only the molecular target, such as a thiol-bearing protein, can activate the phototrigger has been demonstrated. Such target-activatable phototriggers comprise three parts: a 7-aminocoumarin phototrigger, an electron acceptor (maleimide) that efficiently quenches the coumarin excited state, and…
We report the complex dielectric function of high-quality nearly-stoichiometric ${\mathrm{Rb}}_{2}{\mathrm{Fe}}_{4}{\mathrm{Se}}_{5}$ single crystals with ${T}_{\mathrm{c}}=32\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ determined by wide-band spectroscopic ellipsometry and time-domain transmission spectroscopy in the spec…
CuO nanoparticles with diameter in the 20–30 nm range were prepared by a spinning disk reactor at the rate of 16.9 kg/day based on the process intensification concept. The intense environment, that is, vigorous mixing and fast reaction at the same time, created within an initially crystal-free liquid film moving over…
Silver nanoclusters protected by 2-phenylethanethiol ( 1 ), 4-fluorothiophenol ( 2 ), and l -glutathione ( 3 ) ligands were successfully synthesized. The optical properties of the prepared silver nanoclusters were studied. The absorption signal of Ag@SCH 2 CH 2 Ph in toluene can be found at 469 nm, and Ag@SPhF in THF…
BACKGROUND: Heart valve disease is currently a growing problem, and demand for heart valve replacement is predicted to increase significantly in the future. Existing "gold standard" mechanical and biological prosthesis offers survival at a cost of significantly increased risks of complications. Mechanical valves may c…
We propose a metamaterial design for realizing inhomogeneous and anisotropic effective media based on the localized waveguide resonance mechanism. Such a design can be easily achieved in experiment and enables us to simultaneously manipulate the wavefront and the state of polarization of the transmitted electromagneti…
The crystal structure, dielectric, magnetic and magnetoelectric (ME) properties of Bi1-xGdxFeO3 (BGFO, x = 0, 0.05, 0.1, 0.15, 0.2) multiferroic ceramics have been studied. The substitution of bismuth by gadolinium induces a R3c -> Pnma phase structural transition at x > 0.1, which leads to the suppression of the spir…
We discuss the role of electronic correlations in the iron-based superconductor LiFeAs by studying the effects on band structure, mass enhancements, and Fermi surface in the framework of density functional theory combined with dynamical mean field theory calculations. We conclude that LiFeAs shows characteristics of a…
Machine learning is a broad discipline that comprises a variety of techniques for extracting meaningful information and patterns from data. It draws on knowledge and ``know-how'' from various scientific areas such as statistics, graph theory, linear algebra, databases, mathematics, and computer science. Recently, mate…
Metamaterials attain their behavior due to resonant interactions among their subwavelength components and thus show specific designer features only in a very narrow frequency band. There is no simple way to dynamically increase the operating bandwidth of a narrowband metamaterial, but it may be possible to change its…