Materials Literature
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The drainage of SiO(2) nanoparticle-cationic surfactant (TTAB) mixtures through calibrated aqueous foams had been studied by combining several approaches on both the macroscopic and the local scale. Macroscopic measurements reveal a strong stabilizing effect arising for nanoparticle concentrations as low as 2 wt % mai…
Ab initio density-functional calculations have been used to study the response of two face-centered-cubic metals (Al and Cu) to shearing parallel to the close-packed (111) planes along two different directions, $[11\overline{2}]$ and $[\overline{1}10]$. Two different types of deformations---affine and alias---have bee…
We study the vibrational modes of three-dimensional jammed packings of soft ellipsoids of revolution as a function of particle aspect ratio $ε$ and packing fraction. At the jamming transition for ellipsoids, as distinct from the idealized case using spheres where $ε= 1$, there are many unconstrained and non-trivial ro…
In this work, we use the first-principle density-functional approach to study the electronic structure of a H atom adsorbed on the ideal Pt(111) and vicinal Pt(211) and Pt(331) surfaces. Full three-dimensional potential-energy surfaces (3D PES's) as well as local electronic density of states on various adsorption site…
The structural, elastic, and electronic properties of ReN$_{2}$ are investigated by first-principles calculations with density functional theory. The obtained orthorhombic $Pbcn$ structure is energetically the most stable structure at ambient pressure. ReN$_{2}$ is a metallic, superincompressible solid and presents a…
The percentage of substitutional doping of magnetic atoms (Mn) in group-IV-based dilute magnetic semiconductors can be increased by codoping with another conventional electronic dopant, as demonstrated from first-principles calculations recently [W. G. Zhu, Z. Y. Zhang, and E. Kaxiras, Phys. Rev. Lett. 100, 027205 (20…
All living organisms face a variety of environmental stresses that cause the misfolding and aggregation of proteins. To eliminate damaged proteins, cells developed highly efficient stress response and protein quality control systems. We performed a biochemical and structural analysis of the bacterial CtsR/McsB stress…
Abstract Little hollow! Monodisperse ZnS hollow nanospheres (see figure) of about 200 nm in size have been fabricated on a large scale by a hydrothermal method and they show good photocatalytic activity in the decolorization of an aqueous solution of rhodamine B under UV irradiation. magnified image Monodisperse wurtz…
The increasing use of nanomaterials in almost all sectors of society (e.g., health or energy to agriculture and transport) has generated a need for innovative detection methods for nanomaterials, to enable their continued development, environmental and toxicological monitoring, and risk assessment. In vivo nanoparticl…
We have studied the transport properties of graphene transistors in different solvents with dielectric constant varying over 2 orders of magnitude. Upon increasing the dielectric constant, the carrier mobility increases up to 3 orders of magnitude and reaches approximately 7 x 10(4) cm(2)/v.s at the dielectric constan…
Quasicrystals are solids whose atomic arrangements have symmetries that are forbidden for periodic crystals, including configurations with fivefold symmetry. All examples identified to date have been synthesized in the laboratory under controlled conditions. Here we present evidence of a naturally occurring icosahedra…
Fabrication of scaffolds with suitable chemical, mechanical, and electrical properties is critical for the success of nerve tissue engineering. Electrical stimulation was directly applied to electrospun conductive nanofibrous scaffolds to enhance the nerve regeneration process. In the present study, electrospun conduc…
Tissue engineering is currently limited by the inability to adequately vascularize tissues in vitro or in vivo. Issues of nutrient perfusion and mass transport limitations, especially oxygen diffusion, restrict construct development to smaller than clinically relevant dimensions and limit the ability for in vivo integ…
Dihydrogen, methane, and carbon dioxide isotherm measurements were performed at 1-85 bar and 77-298 K on the evacuated forms of seven porous covalent organic frameworks (COFs). The uptake behavior and capacity of the COFs is best described by classifying them into three groups based on their structural dimensions and…
Thermoplastic polyurethanes with introduced poly(ε-caprolactone) (PCL/TPU) show shape-memory properties. Such materials are widely used for orthopaedic splints production but create large amount of waste. Generally, this waste disposed of to landfill; therefore, utilization problem arise. The goal of this investigatio…
Ultrahigh-density carbon nanoring arrays on a silicon wafer are achieved by a novel templated solution deposition method. Initially the silica nanodot arrays obtained from a nanoporous thin film are used as a template to direct the surface dewetting of a phenolic precursor, while further curing and calcination of the…
Abstract BACKGROUND: Recently, much work has focused on the efficient dispersion of carbon nanotubes (CNTs) throughout a polymer matrix for mechanical and/or electrical matrices. However, CNTs used as enhancement inclusions in a high‐performance polymer matrix, especially in poly(aryl ether ketone) (PAEK), have rarely…
Miscibility and morphology of poly(ether sulfone)/poly(vinyl pyrrolidone) (PES/PVP) blends containing a crystalline phytochemical called mangiferin were investigated using differential scanning calorimetry (DSC), Fourier transformed infrared spectroscopy (FTIR), and polarized optical microscopy (POM). The binary blend…
The optical spectra and electron paramagnetic resonance (EPR) g and A factors of calcium aluminoborate glasses (CaAB) : VO2+ are calculated using a complete diagonalization (of the energy matrix) process (CDP). Good agreement between the theoretical values and experimental results indicates the effectiveness of the CD…
The controlled decomposition of crystalline Ce 1− x La x (OH)CO 3 samples to give nanocrystalline Ce 1− x La x O 2−δ solid solutions is studied as a function of temperature and La(III) content. The hexagonal basic carbonates, related to the mineral bastnaesite, are shown to be suitable precursors for the obtainment of…