Materials Literature
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A class of striped superstructures with local hexagonal ordering has been obtained by depositing submonolayer Mn on the GaN(0001) surface. Combining scanning tunneling microscopy and first-principles theory, we find that Mn atoms incorporate into the surface and form a high-density two-dimensional Mn${}_{x}$Ga${}_{1\e…
The unprecedented combined reduction of chloroauric acid and capping of the resulting gold nanoparticles in the absence of an external reducing agent are demonstrated using a novel heteroleptic Ir(III) complex incorporating a 4,5-diazafluorenedithiolate ligand. The reduction process in basic medium results from a casc…
In this paper, multicolor ITO/SiOx/p-Si/Al light emitting diodes (LEDs) made by Si quantum dot (Si-QD) embedded Si-rich SiOxgrown by detuning the radio frequency (RF) plasma power under the plasma-enhanced chemical vapor deposition system are presented. With the Si-QD size shrinkage obtained by increasing the RF plasm…
A heterogeneous version of the Tool-Narayanaswamy-Moynihan (TNM) model is proposed, in which enthalpy relaxation is heterogeneous in the sense that the overall nonexponential relaxation originates from the superposition of independently and exponentially relaxing domains with individual time constants. Analogous to ra…
Cerium-doped ZnS nanoparticles have been synthesized through hydrothermal method. The nanoparticles were stabilized using hexamethylenetetramine (HMTA) as surfactant in aqueous solution. The average particle size of the prepared samples is about 2 nm. The structure of the as-prepared ZnS nanoparticles is cubic (zinc b…
The effectiveness of maleic anhydride grafted ethylene propylene diene monomer rubber (EPDM-g-MAH) as an interfacial compatibilizer in enhancing the extent of interaction between natural rubber (NR) matrix and organoclay (OC) nanolayers, and also the eventually developed microstructure during a melt mixing process, ha…
Dynamic viscoelastic properties of cellulose carbamate (CC) dissolved in NaOH aqueous solution were systematically studied for the first time. CC was microwave-assisted synthesized from the mixture of cellulose and urea and then dissolved in 7 wt % NaOH aqueous solution precooled to -7 °C. The obtained CC solution is…
We report the unusual formation of mesoporous aluminosilicates with enhanced properties from a zeolite recipe. The mesoporous aluminosilicates were prepared from a recipe typically used for the synthesis of microporous zeolite BEA. The key to the formation of a mesostructured material is use of a relatively low crysta…
BACKGROUND: The use of silica coated magnetic nanoparticles as contrast agents has resulted in the production of highly stable, non-toxic solutions that can be manipulated via an external magnetic field. As a result, the interaction of these nanocomposites with cells is of vital importance in understanding their behav…
The rheological behaviors of high-density polyethylene (HDPE)/ultra-high molecular weight polyethylene (UHMWPE) blends prepared by melt blending and solution blending were studied. The results showed that the rheological parameters (G′, G ″, and η*) of both types of blends increased gradually with increasing fraction…
The stability of model catalysts based on size-selected Pd clusters supported on graphite surfaces has been explored under realistic conditions for catalytic oxidation of methane at mild temperatures. The experimental results show that aggregated films of nanoparticles are highly unstable, but clusters pinned to the s…
The rock-salt ordered type double perovskite Sr${}_{2}$InReO${}_{6}$ is systematically investigated by means of powder x-ray diffraction, neutron powder diffraction, temperature-dependent electrical transport, heat capacity and magnetic susceptibility measurements, and electronic band structure calculations. The cryst…
A synthetic method for ZnTe magic-sized clusters (MSCs) is reported, and the stability and growth kinetics of these clusters are investigated. Four distinct MSC families, with lowest-energy absorption peaks at 330, 354, 378, and 392 nm, are observed. The stability and growth kinetics of the MSCs are strongly influence…
This paper presents the novel synthesis of gold nanoparticles of different sizes and hence colours in a wool fibre matrix, simultaneously utilising the chemical affinity of gold for sulfur to bind the nanogold to the disulfide linkages in cystine amino acids in the keratin protein. For this, the wool fibres act as a s…
The ordering kinetics of directed assembly of cylinder-forming diblock copolymers is investigated by cell dynamics simulation of the time-dependent Ginzburg-Landau theory. The directing field, mimicking chemically or topologically patterned surfaces, is composed of a rectangular array of potential wells which are attr…
Alkyl substitution at the α position(s) of mono-, bi-, and terthiophenes via electrophilic addition of macrocyclic end caps combines linear, π-conjugated aromatic compounds and annular macrocycles. Addition of the Hg(II) ion to terthiophene adducts produces intense color changes, allowing for the selective, colorimetr…
The use of plant-based biomimetic branching structures in textiles can enhance their water absorption and one-way transport properties. In this study, double-layered knitted structures were developed in which two or more yarns were combined at the technical back of the fabric and separated at the technical face to emu…
The solubilities of 2-(2,4,6-trichlorophenoxy)ethyl bromide in methanol, ethanol, propanol, isopropanol, acetone, acetonitrile, and n -heptane were measured using the analytical stirred-flask method over the temperature range from (278.2 to 323.2) K. The results showed that acetone had highest solubilities and solubil…
Abstract Colloidal PbS quantum dots (QDs) with tunable photoemission throughout the near‐infrared (NIR) region (ca. 750–1000 nm) were synthesized by a two‐phase approach. Here, oil‐soluble lead oleate formed by a reaction of lead acetate and oleic acid (OA, the capping agent) in n‐decane at 130 °C was used as lead pre…
The synthesis and characterization of thermally labile dendronized linear AB step-polymers is described. First through third generation dendritic AB monomers 14a − c containing both a furan and furan-protected maleimide functionality were prepared by the Cu(I)-catalyzed azide−alkyne cycloaddition reaction followed by…