Materials Literature
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Taking the organic molecular material dithiophene-tetrathiafulvalene (DT-TTF) as an example of a high mobility organic molecular material, we use density functional calculations to calculate the dependency of the reorganization energy associated with charge carrier transport on: (i) the geometric and electronic respon…
Abstract Mg–Al–Fe ternary hydrotalcites were synthesized by a coprecipitation method and characterized with powder X‐ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The flame‐retardant effects of Mg/Al–CO 3 layered double hydroxides (LDHs) and Mg/Al/Fe–CO 3 LDHs in an ethylene…
An in situ spectroscopic ellipsometry study has been performed to investigate $\mathrm{La}\mathrm{Ni}{\mathrm{O}}_{3\ensuremath{-}x}$ phase transition associated with oxygenation and/or reduction reversible treatments. Epitaxial thin films of $\mathrm{La}\mathrm{Ni}{\mathrm{O}}_{3}$ were deposited onto $\mathrm{Sr}\ma…
A new series of mixed-framework compounds in the chalcohalide family has been synthesized using the conventional solid-state reactions. These include CdSb 2 Se 3 Br 2 1 and its isoelectronic indium derivatives InSb 2 S 4 X (X = Cl 2 and Br 3 ) and InM 2 Se 4 Br (M = Sb 4 and Bi 5 ). Single crystals were grown from dir…
Abstract Commercial electronic devices require shielding solutions that ensure electromagnetic compatibility (EMC) while accounting for effects of specific enclosure structural features such as seams, vents, and port dimensions. In practice, suitable EMC materials combine with the device operating characteristics to d…
Abstract In this paper, a new image analysis based method for electrospun nanofiber diameter measurement has been presented. The method was tested by a simulated image with known characteristics and a real web. Mean (M) and standard deviation (STD) of fiber diameter obtained using this method for the simulated image w…
Abstract In this study, polylactide (PLA)-multi-walled carbon nanotube (MWCNT) nanocomposites were melt-compounded using a twin-screw extruder. Solid and microcellular tensile bar specimens were produced via conventional and microcellular injection molding, respectively. Various characterization techniques were applie…
Use of sol–gel condensation reactions with the proper precursors, in conjunction with electrospinning methods, leads to the facile formation of one-dimensional nanofibers of silicon or germanium dioxide doped with erbium. These nanowires are characterized by a combination of scanning and transmission electron microsco…
Abstract The stability of chitosan with a degree of deacetylation (DD) of 88 and 81% was investigated in solution during storage for 60 days at various temperatures (60, 28, and 5°C) and acid concentrations (0.8 M , 0.2 M , and 0.1 M ). The first‐order rate constant of chain hydrolysis of 88%DD chitosan at 60°C was ab…
ZnO thin films with c -axis orientation have been prepared by a sol–gel method on glass substrates. An ethanol solution mixed with zinc acetate dihydrate and monoethanolamine was used as the precursor for spin-coating. Preferentially oriented ZnO thin films were prepared by preheating the as-deposited films at 300 °C…
An electrogenerated precursor has been developed for green synthesis of highly luminescent aqueous CdTe quantum dots (QDs) with unique quantum yield and strong electrogenerated luminescence, which can access cellular targets via specific binding and have potential application as biolabels in highly sensitive biosensin…
The method of pseudopotentials within the generalized gradient approximation has been employed to calculate the phase stability, electronic structure and elastic constants of β, α'' and ω metastable phases in the Ti–25 at.% Nb alloy. The bulk, shear and Young's moduli of those metastable phases are estimated from the…
We report a previously unknown body-centered-tetragonal structure for ZnO. This structure results from a phase transformation from wurtzite in [0001]-oriented nanorods during uniaxial tensile loading and is the most stable phase for ZnO when stress is above $7\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The stress-induce…
We report density functional studies of the (001) surface of magnetite that account for local Coulomb interactions. Iron cations in the surface layers exhibit charge and ${t}_{2g}$ orbital ordering that is coupled with the lattice strains. Orbital ordering is present for various surface stoichiometries and causes open…
Self-healing via a vascular network is an active research topic, with several recent publications reporting the application and optimization of these systems. This work represents the first consideration of the probable failure modes of a self-healing system as a driver for network design. The critical failure modes o…
The luminescence efficiency of individual single-walled carbon nanotubes was determined by comparing the fluorescence from individual nanotubes to single CdTe/ZnS quantum dots with a well-defined fluorescence quantum yield (QY). The single carbon nanotube QY was determined to be 3 +/- 1%, nearly 100 times greater than…
A dry-jet wet spinning process for making magnetically active cellulose fibers has been developed using the ionic liquid (IL) 1-ethyl-3-methylimidazolium chloride ([C2mim]Cl). Cellulose from different sources with various degrees of polymerization (DP) was used for making fibers by first dissolving the cellulose in th…
CuInSe 2 related materials-based heterojunction diodes have received much attention, owing to their highest power conversion efficiency (19.5%) among all the thin-film solar cell technologies. Important issues on the microstructure and formation mechanism of CuInSe 2 −CdS p-n heterojunction persist due to the complexi…
A novel self-supported nanoporous gold film electrode with ultrahigh surface area shows excellent electrocatalytic activity and stability toward the direct oxidation of methanol in alkaline solution. The activity of NPGF electrode was about 400 times that of the smooth gold electrode and did not decrease after 100 cyc…
Sending signals: The first core-modified, expanded porphyrin with polyaromatic units fused to the pyrrole rings absorbs far into the near-infrared and shows fluorescence that stretches into the second optical window of telecommunication. Doping a polyurethane membrane with the dye yields Hg2+-responsive optical test s…