Materials Literature
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Capacitively coupled plasma of diethylene glycol dimethyl ether (diglyme) monomer was used to deposit films chemically similar to polyethylene glycol (PEG) on low-density polyethylene (LDPE) and Si(100) substrates pretreated with Ar plasma. The topography, thickness, chemical characteristics, and compositions of films…
The effect of carbon blacks on the electrical properties of filled EPDM is investigated by comparing five types of carbon blacks. Electrical tests show that EPDM filled with carbon black having a large value of surface area (conductive carbon black, CCB) displays the low volume and surface resistivities, and easily su…
Nickel hydroxyl sulfate (Ni(SO 4 ) 0.3 (OH) 1.4 ) nanobelts were obtained via a simple template-free hydrothermal reaction. The structural evolution of Ni(SO 4 ) 0.3 (OH) 1.4 nanobelts during ex situ heat treatment and in situ electron irradiation are investigated using transmission electron microscopy (TEM) technique…
Abstract Starch microcellular foams (SMCFs) are prepared by pore preserving drying or formation processes and contain pores in the micron size range. SMCFs have high specific surface area and are useful for applications such as opacifying pigments or as adsorbent materials. The objective of this research was to determ…
Lattice, magnetic, and optical properties are investigated for films of Prussian-blue-type cyanides, ${\text{Na}}_{1.60\ensuremath{-}\ensuremath{\delta}}\text{Co}{[\text{Fe}{(\text{CN})}_{6}]}_{0.90}\ensuremath{\cdot}2.9{\text{H}}_{2}\text{O}$ $(0.0\ensuremath{\le}\ensuremath{\delta}\ensuremath{\le}0.85)$, as a functi…
Abstract Epoxy adhesives reinforced with carbon nanotubes (CNTs) were developed. The distribution of the CNTs in the epoxy matrix was observed with transmission electron microscopy. Joints were formed by unclad 2024‐T3 aluminum adherents bonded with the CNT‐filled epoxy adhesives. The durability of the joints was stud…
The photophysical mechanism underlying the photochromic behavior of green fluorescent protein (GFP) mutants is investigated by means of preresonant Raman spectroscopy and model calculations. The studied molecules are reversibly switchable fluorophores that can be repeatedly converted between fluorescent and nonfluores…
The syntheses and structures of hafnium(iv) and zirconium(iv) complexes with Keggin tri-lacunary polyoxometalates (POM) [A-alpha-PW(9)O(34)](9-), i.e., (Et(2)NH(2))(7)H(2)[Hf(3)(micro-OH)(3)(A-alpha-PW(9)O(34))(2)].11H(2)O (Et(2)NH(2)-) and (Et(2)NH(2))(7)H(2)[Zr(3)(micro-OH)(3)(A-alpha-PW(9)O(34))(2)].12H(2)O (Et(2)N…
A molecular dynamic simulation of a mixture of light and heavy gases in a rapidly imploding sphere exhibits virtually complete segregation. The lighter gas collects at the focus of the sphere and reaches a temperature that is several orders of magnitude higher than when its concentration is 100%. Implosion parameters…
We use density functional theory to study the effect of molecular adsorbates on the conductance of metallic carbon nanotubes (CNT). The five molecules considered (NO2, NH2, H, COOH, OH) lead to very similar scattering of the electrons. The adsorption of a single molecule suppresses one of the two available transport c…
Dispersions of isolated single wall carbon nanotubes (SWNTs) in pure organic solvents can usually be prepared only at low concentrations (∼0.01−0.02 g/L). Here, we use poly(vinylpyrrolidone) as a dispersant for unfunctionalized SWNTs in N -methyl-2-pyrrolidone and achieve concentrations of up to ∼0.16 g/L. Such disper…
Second-generation self-assembling bis-urea macrocycles were designed that form columnar structures in the solid state. The new macrocycles were constructed from more flexible building blocks yielding greater solubility and a more efficient synthesis. In addition, heteroatoms in the form of ether oxygens were incorpora…
Three new nonlinear optical (NLO) chromophores (1–3) with the same dialkylamino group as an electron donor and the same 2-dicyanomethylene-3-cyano-4-methyl-2, 5-dihydrofuran (TCF) as an electron acceptor have been synthesized and characterized. The only difference in these three molecules lies in the length and nature…
We present a systematic study of flexible cylindrical brush-shaped macromolecules in a good solvent by small-angle neutron scattering (SANS), static light scattering (SLS), and by dynamic light scattering (DLS) in dilute and semi-dilute solution. The SLS and SANS data extrapolated to infinite dilution lead to the shap…
Monodisperse peanut-shaped particles having various chemical compositions, architectures (core–shell and hollow) and properties (optical and magnetic) were prepared from hematite templates. The colloids enable shape programming alone, optical manipulation, or magnetic field approaches to assembly.
Magnetization measurements of a Mn12mda wheel single-molecule magnet with a spin ground state of S = 7 show resonant tunneling and quantum phase interference, which are established by studying the tunnel rates as a function of a transverse field applied along the hard magnetization axis. A Dzyaloshinskii-Moriya (DM) e…
Abstract Poly(butylene succinate) (PBS) nanocomposites with multiwalled carbon nanotubes (MWNTs) prepared by melt compounding were studied for the effect of MWNT dispersion on the modulus and crystallization kinetics. The nucleating effect of the addition of 0.1 wt % MWNT to PBS was clearly demonstrated. Differential…
Synthesis of cerium oxide nanocrystallites via precipitation using triethanolamine is reported. The molecular water associated with the cerium nitrate precursor is exploited to generate hydroxyl ions with the help of triethanolamine, facilitating precipitation. The small crystallite diameter (3 nm) in the as prepared…
Abstract Improving the conductivity of electrospinning solutions is often achieved by adding small amounts of conductive additives. HMIMCl, a room temperature ionic liquid, and TEBAC, a quaternary ammonium salt, were added to polylactic acid in chloroform and their effects on solution properties, electrospinning, and…
This paper reports the wet cross-linking of gliadin fibers using citric acid without using phosphorus-containing catalysts or high temperatures. Carboxylic acids such as citric acid are inexpensive and nontoxic chemicals preferred for cross-linking proteins and cellulose. However, previous studies have shown that carb…