Materials Literature
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Obtaining well-diffracting crystals remains a major challenge in protein structure research. In this chapter, we review currently available computational methods to estimate the crystallization potential of a protein, to optimize amino acid sequences toward improved crystallization likelihood, and to design optimal cr…
First observation of stimulated Cr 2+ emission in ZnS:Cr electroluminescent (EL) impact-excited thin-film waveguide structures is reported. The structures consist of the following thin films deposited on a glass substrate: a transparent In 2 O 3 :Sn electrode, an insulator SiO 2 /Al 2 O 3 layer (~270 nm), an EL ZnS:Cr…
Recently, new additions to nonconjugated conductive polymers have been made that include: poly(β-pinene), poly(ethylenepyrrolediyl) derivative and polynorbornene. These polymers have different double-bond number fractions per repeat compared to previously reported nonconjugated conductive polymers. Upon doping with el…
The effect of network density of single-walled carbon nanotubes (SWNTs) on the detection of DNA hybridization was investigated. The results show that, in contrast to those having higher densities, SWNTs with low network densities in the conductance range of 0.74 × 10 −7 < G bare < 2.00 × 10 −7 exhibit high sensitivity…
Abstract In this work, poly(2‐fluoroaniline), poly(2‐chloroaniline), poly(2‐methylaniline), and poly( N ‐ethylaniline) were prepared by a self‐assembly method using an oxidizing system consisting of a dopant anion, p‐toluene sulfonate with ammonium peroxydisulfate. The effects of substituents on the surface morphology…
The mechanical properties and morphology of the composites of nylon 6, acrylonitrile-butadiene-styrene (ABS) rubber, and nano-SiO2 particles were examined as a function of the nano-SiO2 content. A mixture with separation and encapsulation microstructures existed in the nylon 6/ABS/nano-SiO2 at lower nano-SiO2 content,…
We report on the effect of electron injection on the magneto-optical properties of MgZnO/ZnO(5 nm)/MgZnO single quantum wells (SQWs) by embedding a Ga delta-doped layer in one of the MgZnO barriers. Approaching the delta-doped layer to the SQW resulted in a photoluminescence (PL) blueshift due to the screening of inte…
We report the time and temperature dependent response of thermopower in the non-magnetic perovskite oxide NdNiO(3). We find that on cooling below the metal-insulator transition temperature the system evolves into a phase separated state which consists of supercooled metallic and insulating phases. This phase separated…
Abstract SnO 2 ·CoO·Nb 2 O 5 ceramics doped with TiO 2 have been prepared by a conventional oxide method which focuses its application on low voltage varistors. The dopant was added in 0.5 and 1.0% molar concentrations, and the samples were investigated by X‐ray diffraction, scanning electron microscopy, current vs .…
We demonstrate the ability to make high resolution arbitrary patterned optical retarders using liquid crystal polymer (LCP). Contact lithography is used to define unique LCP alignment domains. Patterned LCP retarders are imaged between crossed polarizers to determine pattern visibility as a function of feature size. I…
Four types of chopped fibers have been studied as reinforcement additives in a standard natural rubber based, carbon black filled formulation. The fibers studied were aramide (2 types) and polyester (2 types). The chopped fibers were added on top of the carbon black filled rubber compound at 2, 4, and 8 phr levels. Th…
Little is known about the chemical equilibrium formed between the micellar complex of oleylamine and aurous halide during the synthesis of Au nanoparticles employing an Au(I) precursor. In this paper, we determine for the first time the stability constant of the intermediate oleylamine/Au complex during the first stag…
Abstract Sr 2 LiSiO 4 F:Ce 3+ ,Li + phosphors have been synthesized by solid‐state reaction. The photoluminescence (PL) emission and excitation behavior of blue‐emitting Sr 2 LiSiO 4 F:Ce 3+ ,Li + phosphors have been reported. Three dominant bands centered at about 250, 280, and 340 nm characterized the excitation spe…
We report on an improved processing method for fabricating multiwalled carbon nanotubes/glass-ceramic nanocomposites based on vanadium doped silicate glass matrices. Starting from the design of a stable aqueous dispersion of CNTs, achieved using a cationic surfactant, the interaction of CNTs with glass particles in su…
Abstract Monodispersed PbSe nanocubes were synthesized through a simple hydrothermal method by using Pb 2+ ‐EDTA complex and Na 2 SeSO 3 . Composition and morphology of the samples were characterized by means of XRD, TEM and SEM. The gradually releasing of Pb 2+ from Pb 2+ ‐EDTA complex, and the adopting of PVP can ad…
Abstract The multiferroic compounds Bi 0.9 Sm 0.1 FeO 3 , Bi 0.9 Gd 0.1 FeO 3 , Bi 0.9 Ca 0.1 FeO 3 , Bi 0.9 Sm 0.05 Ca 0.05 FeO 3 , and Bi 0.9 Gd 0.05 Ca 0.05 FeO 3 were prepared by the conventional ceramic method and were characterized by X‐ray diffraction, vibrating sample magnetometry, and differential scanning ca…
We have assembled single-wall carbon nanotubes into ultrathin long fibrils using a dielectrophoretic technique and studied the mechanical and electrochemical properties of carbon nanotube fibrils. The diameter of the fibrils can be controlled in the range of 200 nm to 2 mum, and the length can reach as long as 1 cm. T…
Fluorescence correlation spectroscopy (FCS) was employed to study the effect of chain topology on the small tracer diffusion in linear and star-shaped 1,4-polyisoprenes (PIs) at temperatures well above the glass transition. In the linear polyisoprene, a Fickian diffusion behavior was observed that is characterized by…
In this article, the limiting oxygen index (LOI), UL-94 test, and cone calorimeter test (CCT) were used to study the combustion behaviors of polypropylene (PP)/magnesium hydroxide (MH)/expandable graphite (EG) composites and the synergistic flame-retardant effects of EG with modified MH on PP. The residues from the co…
Yue-Fei Zhanga, Xun Lia & Xian-Shan Weia a School of Chemistry and Biological Engineering , Changsha University of Science and Technology , Changsha, China Bicyclic [2,2,1] heptane di-carboxylate (commercial product name: HPN-68) is a novel nucleating agent with high nucleation efficiency for α-iPP. In this article, d…