Materials Literature
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We report the design, simulation, and measurement of a dual-band metamaterial absorber in the terahertz region. Theoretical and experimental results show that the absorber has two distinct and strong absorption points near 0.45 and 0.92 THz, both which are related to the LC resonance of the metamaterial. The distribut…
<div class="htmlview paragraph">The present work involves systematic study on identification of process parameters and processing conditions for effective laser surface-hardening of automotive crankshaft and its implementation in the industry, utilizing a diode laser integrated to a 6-axis robot and a turn/tilt…
We present experiments investigating the growth of ice crystals from water vapor in air using a free-fall convection chamber. We measured growth rates at temperatures of -5 C and -10 C as a function of supersaturation at an air pressure near one bar. We compared our data with numerical models of diffusion-limited grow…
Ice crystals growing in highly supersaturated air at temperatures near -5 C exhibit a distinctive, nonplanar dendritic morphology that has not been previously documented or explained. We examine this structure and identify its most prominent features in relation to the ice crystal lattice. Developing a full 3D numeric…
Six new photosensitive and optically active poly(amide-imide)s (PAIs) with good inherent viscosities based on N,N′-(pyromellitoyl)-bis-L-amino acid and dibenzalacetone moiety in the main chain were synthesized from the direct polycondensation reaction of N,N-(pyromellitoyl)-bis-L-amino acids 3a–f with 2,5-bis(4-aminob…
We present the crystal structure of the extracytoplasmic domain of the Bacillus subtilis PhoR sensor histidine kinase, part of a two-component system involved in adaptation to low environmental phosphate concentrations. In addition to the PhoR structure, we predict that the majority of the extracytoplasmic domains of…
Nano-conjugation (also known as nano-coupling) is one of the important procedures to build nanotechnology platforms. We have designed a new nano-conjugate made of folic acid and gold nanoparticle (AuNP). This nano-conjugate has application for selective targeting of the folate receptor that is overexpressed on the sur…
Anaerobic cultures of Shewanella oneidensis MR-1 reduced toxic Ag(I), forming nanoparticles of elemental Ag(0), as confirmed by X-ray diffraction analyses. The addition of 1 to 50 microM Ag(I) had a limited impact on growth, while 100 microM Ag(I) reduced both the doubling time and cell yields. At this higher Ag(I) co…
Conducting polymer electrolyte (CPE) films based on poly(vinyl alcohol) (PVA) complexed with NaI salt were prepared by a solution cast technique. The structural properties of these electrolyte films were examined by XRD studies. The XRD results revealed that the amorphous domains of PVA polymer matrix were increased w…
The conductivity of dense ceramics of nanocrystalline yttria-stabilized zirconia (nano-YSZ), with average grain sizes ranging from 13 nm to 100 nm, was measured in wet and dry air as a function of temperature between 30 °C and 500 °C. Under wet conditions (pH2O = 2.3 × 10−2 atm) the measured conductivity at low temper…
We report a novel peptide-amphiphile having a simple molecular structure that can gelate an aqueous solution at a remarkably low concentration and can be designed to be responsive to a disease-related enzyme by undergoing a drastic morphological change.
A series of large mesoporous carbons (LMC, 20–50 nm) with hierarchical porosities has been prepared using commercially available CaCO3 nanoparticles as a template, formaldehyde (PF) resin as carbon precursor, and HCl solution for removing the template. During the carbonization process, the CaCO3 template decomposes re…
The temperature dependence of the pre-edge features in x-ray absorption spectroscopy is reviewed. Then, the temperature dependence of the pre-edge structure at the K-edge of titanium in rutile TiO2 is measured at low and room temperature. The first two peaks grow with temperature. The fact that these two peaks also co…
We present an implementation of the hybridization expansion impurity solver which employs sparse matrix exact-diagonalization techniques to compute the time evolution of the local Hamiltonian. This method avoids computationally expensive matrix-matrix multiplications and becomes advantageous over the conventional impl…
The Christiansen filter that is realized by odd smooth cylindrical lenses is analyzed in detail. Several popular filtering functions are discussed. The corresponding lens profile functions are obtained by an inverse scattering theory, which enables the filter to synthesize a desired prescribed response function. This…
Mo 6 S 9− x I x (MoSI) molecular nanowires have been recently shown to form intriguing large-scale self-assembled networks using specific bonding with gold nanoparticles in solution. Despite a consistent number of microscopic studies that have been reported in the literature, a definite study of the nanowire−nanoparti…
Summary Effects of pH (3.75–8.25) and chitosan (0–0.36%) on emulsion capacity (EC), emulsion stability (ES) and apparent yield stress values of emulsion (raw emulsion; AYSe) and emulsion gel (cooked emulsion; AYSg) of beef were studied by using a model system. Chitosan increased ES, AYSe and AYSg values of beef in the…
The degradation mechanisms of multilayer graphene spin valves are investigated. The spin injection signals in graphene spin valves have been reported to be linearly dependent on the drain bias voltage, which indicates that the spin polarizations of injected spins in graphene are robust with respect to bias voltage. We…
Two polymorphic hybrid organic−inorganic bilayered magnetic conductors (BEDT-TTF) 3 (FeCl 4 ) 2 ( I and II ) (BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene) were obtained by the diffusion method. I crystallizes in a monoclinic system with cell parameters: a = 55.9187(7) Å, b = 6.7424(1) Å, c = 14.9057(3) Å, β = 101…
Two notes on the interpretation of the magnetocrystalline anisotropy energy are given. First, methods to define atom-resolved contributions to the magnetocrystalline anisotropy energy of compounds are scrutinized. Second, a method concerning bond-resolved contributions is introduced which is able to test Kittel's famo…