Materials Literature
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Random copolymers of styrene and 4-vinylpyridine P(S 1− x - co -4VP x ) were synthesized to study the effect of the random copolymer “repulsion” on the self-assembly in hydrogen-bonded complexes with pentadecylphenol (one PDP molecule per 4VP group). The major trends observed as a function of the fraction of styrene m…
Using in situ synchrotron x-ray photoelectron spectroscopy, we obtained high-resolution $\text{As}\text{ }3d$ and $\text{Se}\text{ }3d$ spectra of Se-rich ${\text{As}}_{36}{\text{Se}}_{64}$ glassy films during illumination with band-gap light. We report direct experimental evidence of the chemical origin of the light-…
Electrical conductivity switching is induced by photoirradiation in single crystals of α-(BEDT-TTF) 2 I 3 below 135 K. Photoirradiated crystals show differential negative resistance (DNR), and bistability is observed in the electrical conductivity as a function of applied voltage. The threshold in voltage, which induc…
Using an empirical linear combination of atomic orbitals method (LCAO) based on the sp 3 tight-binding scheme, we studied the band structures of graphene nanoribbons with armchair edges terminated by H atoms and found that the band gap exhibits the size dependence and the ‘family’ behaviors, in which a metallic graphe…
A novel nanometer titanium dioxide (nanoTD)/silk fibroin (SF) blend membrane was prepared and characterized by AFM, FTIR, DSC, and XRD. The strength, solubility and thermal properties and the antibacterial activity of the blend membrane were then investigated. The results show that at a nanoTD/SF weight ratio of 0.1%,…
By analogy with hydrogen-bonded molecular capsules, self-assembled nanotubes are of interest because they can temporarily isolate guest molecules from the solution. We show here that the stability of a particular bis-urea based dynamic self-assembled nanotube is related to the possibility for solvent molecules to fit…
We investigate the influence of directional or bonding interactions on the structure and phase diagram of complex fluids. Using a generalization of the theory of associating fluids we study the interplay between the self-assembly process, driven by the bonding interactions, and the isotropic-nematic transition, driven…
In this paper, single-crystal ZnS column arrays are prepared on the ZnS wafer. The ZnS column arrays are then utilized as a transition layer to achieve large-scale homoepitaxial growth of ZnS nanowire arrays. Through annealing ZnS columns coated with Au films at different temperatures, the Au particle density is contr…
Abstract With the ever decreasing characteristic lengths of nanomaterials, nonequilibrium electron-phonon scattering can be affected by additional scattering processes at the interface of two materials. Electron-interface scattering would lead to another path of energy flow for the high-energy electrons other than ele…
A complete understanding of the kinetic mechanism of fidelity requires comparison of correct and incorrect dNTP incorporation pathways in both the forward and reverse directions. The studies presented here focus on the dNTP-induced conformational step, which has historically been proposed by many to be the major deter…
Abstract Spinel‐type ZnGa 2 O 4 and ZnAl 2 O 4 powders doped with Eu 3+ and Tb 3+ ions, including dual doping, have been prepared by solid phase reactions and by deposition from chemical solutions. XRD analysis demonstrates the high quality of spinel grains constituting the powder. The luminescence shows that the rare…
A Zn x Cd 1− x S shell was deposited around CdSe nanocrystal cores via a noninjection approach in aqueous media. The deposition of the Zn x Cd 1− x S shell around CdSe cores was carried out at 90 °C in a reaction flask consisting of the shell precursor compounds, together with CdSe nanocrystal cores and the capping re…
Characterization and purification studies have been performed on the single-walled carbon nanotubes (SWNTs), prepared by the large-scale (i.e., at production rates of ∼100 g h −1 ) induction thermal plasma process. The main impurities present in the as-produced soot materials are first identified by various material a…
Abstract Cellulose acetate butyrate biocomposites, plasticized with tributyl citrate at volume fraction V f = 0.1–0.3, were prepared with modified hemp. Inclusion of modified hemp fibres at V f = 0.4 enhanced the modulus and strength of the flexible plasticized cellulose acetate butyrate. Composites containing pectate…
Abstract The purpose of this work is the investigation of some constitutive and configurational aspects of phenomenological model formulations for a class of materials with history‐dependent gradient microstructure. The assumption that the behavior of a material point is affected by history‐dependent processes in a fi…
The incorporation of carbon materials in micro- and nanoscale devices is being widely investigated due to the promise of enhanced functionality. Challenges in the positioning and addressability of carbon nanotubes provide the motivation for the development of new processes to produce nanoscale carbon materials. Here,…
This paper presents an analytical solution to a coupled vibration problem of fluid-conveying double-walled carbon nanotubes (DWCNTs) and analyzes the influences of nonlocal effect, aspect ratio and van der Waals interaction on the fundamental frequency. According to the analysis, the results show that the vibration fr…
Abstract 1,3‐Dithiole‐2‐thione (DTT) was synthesized and characterized using NMR, FT‐Raman, FT‐IR, UV spectroscopies. Resonance Raman spectra (RRs) were obtained with 341.5, 354.7 and 368.9 nm excitation wavelengths and density functional calculations were done to elucidate the electronic transitions and the RRs of DT…
Abstract This work was undertaken to develop an improved gas chromatography (GC) analysis of poly (3‐hydroxyalkanoate) (PHA) quantification method based on acidic methanolysis. This is achieved by investigating the kinetics of acidic hydrolysis of PHAs with sulfuric acid in the chloroform/aqueous solution to identify…
Three new tris(dialkylamino)trioxatriangulenium (ATOTA+) salts rendered amphiphilic by attachment of two (5a x PF6 and 5b x PF6) or four (5c x PF6) n-decyl chains have been synthesized, and their Langmuir films have been studied by grazing incidence X-ray diffraction (GIXD). Compounds 5a x PF6 and 5b x PF6 both self-a…