Materials Literature
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The effect of substitution of niobium for zirconium on tunable behavior of lead barium zirconate (PBZ) films was investigated. Lead barium zirconate niobate films were grown on Pt∕Ti∕SiO2∕Si substrates using chemical solution deposition method. The substitution of Nb for Zr enhances tunable properties of PBZ films. Th…
Local environments surrounding Cd and S in CdS:O thin films have been determined using extended x-ray absorption fine structure (EXAFS) and near-edge x-ray absorption fine structure (NEXAFS). As indicated by the Cd EXAFS, Cd atoms remain predominantly bonded with S. The S EXAFS and NEXAFS clearly demonstrate the prese…
The porosity of Ge films deposited by pulsed laser deposition in an inert gas atmosphere is observed to be directly correlated with the kinetic energy of ablated species. The deposition conditions were modified by varying the pressure and the target-substrate distance. The evolution of the kinetic energy of ablated sp…
The degradation dynamics of polyhydroxyalkanoates of different composition has been studied in an eutrophic storage reservoir for two seasons. It has been shown that the biodegradation of polymers under natural conditions depends not only on their structure and physicochemical properties but also, to a great extent, o…
We report a study by electron paramagnetic resonance on the $E^{\ensuremath{'}}{}_{\ensuremath{\alpha}}$ point defect in amorphous silicon dioxide ($a\mathrm{\text{\ensuremath{-}}}{\mathrm{SiO}}_{2}$). Our experiments were performed on $\ensuremath{\gamma}$-ray irradiated oxygen-deficient materials and pointed out tha…
We quantitatively studied the formation, diffusion, and reactions of mobile interstitial hydrogen atoms $({\mathrm{H}}^{0})$ and molecules $({\mathrm{H}}_{2})$ in ${\mathrm{F}}_{2}$-laser-irradiated silica $(\mathrm{Si}{\mathrm{O}}_{2})$ glass between 10 and $330\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Two key techniqu…
3% and 5% Mn-doped GaN nanocrystals of different sizes, with the average diameters in the range of 4–18nm, have been prepared by two independent routes under solvothermal conditions starting with two different precursors. The reaction temperature was around 350°C in all the preparations. The nanocrystals so prepared e…
Abstract The crosslinking process of ethylene–octene copolymers by dicumyl peroxide (DCP) has been studied under static and dynamic conditions. Under static conditions, our results (gel time, insoluble fraction, and equilibrium modulus) qualitatively agree with the theories on the prediction of properties of random cr…
Cd Se ∕ Zn S core/shell quantum dots (QDs) were filled into porous alumina membranes (PAMs) by dip coating. The deposition of QDs induced changes in the refractive index of the PAMs. The amount of absorbed QDs was quantified by fitting the reflection and transmission spectra observed experimentally with one side open…
This thin-film deposition study of tetrahedral amorphous carbon shows that including infrequent processes on the millisecond scale substantially improves the accuracy of molecular dynamics simulations. Elevated temperature between energetic impacts is used to activate processes which are typically ignored. In agreemen…
Abstract A novel technology was developed to prepare microencapsulated red phosphorus (RP) with a coating of melamine cyanurate (MCA) serving as both a nitrogen‐containing flame retardant and as a solid lubrication agent. We took advantage of the self‐thickening effects during the MCA self‐assembly process to realize…
${\mathrm{C}}_{59}\mathrm{N}$ magnetic fullerenes were formed inside single-wall carbon nanotubes by vacuum annealing functionalized ${\mathrm{C}}_{59}\mathrm{N}$ molecules encapsulated inside the tubes. A hindered, anisotropic rotation of ${\mathrm{C}}_{59}\mathrm{N}$ was deduced from the temperature dependence of th…
Using atomistic molecular dynamics simulations we study solid and liquid crystalline columnar discotic phases formed by alkyl-substituted hexabenzocoronene mesogens. Correlations between the molecular structure, packing, and dynamical properties of these materials are established.
An approach has been developed to produce CdTe films with a high proportion of the metastable wurtzite phase. It involves the use of pulsed laser deposition to produce CdTe nanoparticles which are then collected on a substrate. Electron microscopy indicates that the nanoparticles produced have a relatively minor fract…
A nanotechnique to assemble silver nanocrystals and control the gaps precisely in the sub-10nm regime is demonstrated on an active coating exhibiting surface-enhanced Raman scattering (SERS). The silver nanocrystal superlattice coating boasts a high SERS enhancement factor, large dynamic range, and universal SERS acti…
In this report, a novel method for the synthesis of silver nanoparticles on the surface of hydroxyapatite is described. Hydroxyapatite crystals are synthesized from acid mineralized solution, a byproduct of bone glue industries, by a simple chemical precipitation method, which results in the formation of hydroxyapatit…
Metal-phthalocyanine (MPc) complexes CoPc, CuPc, CuPcCl 15–16 , CuPc(4-NO 2 -5-OPh) 4 , CuPc(4-CH 2 -phthalimide) 4 , CuPc(4-NO 2 -5-NHPhBr) 4 , PdPc, MgPc, PbPc, EuOAcPc, SmOAcPc, SmPc 2 , and YOAcPc were obtained and studied using IR spectroscopy. The correlation between the shift of the absorption band maximum in t…
We have previously shown that MRL/MpJ mice have a capacity for regeneration instead of scar formation following an ear punch wound. Understanding the differences that occur between scar-free regeneration or repair with scarring will have great impact upon advances in skin tissue engineering. A key question that remain…
Abstract Thermomechanical and morphological properties of blends of epoxy monomers and hydroxyl and epoxy functionalized hyperbranched polyesters have been studied. Different properties of the blends were found by changing the cure cycles (a precure step followed by a postcure at higher temperature). All the blends sh…
The authors present a model to analyze hysteresis in transfer characteristics (TCs) of single-wall carbon nanotube field-effect transistors, based on capacitive charging of the surrounding dielectric by charges injected out of the nanotube. The model identifies the extent and time scale of the hysteresis and correctly…