Materials Literature
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This paper describes morphology control and characterization of interfacial properties for the synergistic self-assembly of polymer-stabilized CdS quantum dots (QDs), referred to as PS-CdS, with polystyrene- block -poly(ethylene oxide) (PS- b -PEO) diblock copolymers at the air−water interface. This spontaneous proces…
Abstract We report for the first time the discovery of the gelation properties of Hunter's oligoamide with pendant amino groups, 1 , which possesses structural features different to some conventional gelators. the organogels were studied with infrared spectroscopy, transmission electron microscopy, and differential sc…
Abstract Monte Carlo simulations were used to identify the microphase morphologies of ABA triblock copolymer melts confined in a cylindrical nanotube. The influences of the volume fraction of mid‐block B ( f B ), the radius of nanotube ( R ) and the asymmetry of ABA triblock copolymer chain were discussed in detail. W…
ADP-l-glycero-d-manno-heptose 6-epimerase (HldD or AGME, formerly RfaD) catalyzes the inversion of configuration at C-6' ' of the heptose moiety of ADP-d-glycero-d-manno-heptose and ADP-l-glycero-d-manno-heptose. The epimerase HldD operates in the biosynthetic pathway of l-glycero-d-manno-heptose, which is a conserved…
Flax shive constitutes about 70% of the flax stem and has limited use. Because shive is a lignocellulosic by-product, it can potentially be pyrolyzed and activated to produce an activated carbon. The objective of this study was to create an activated carbon from flax shive by chemical activation in order to achieve si…
To improve the hydrophilicity, pliability, and egradability of some biodegradable polymers such as polylactide (PLA), a triblock copolymer, and poly(ethylene glycol-co-lactide) (PELA) has been electrospun into fibrous membranes in the fiber sizes of 7.5 microm to 250 nm. The relationship between electrospinning parame…
This paper presents a novel approach to assessing textile porosity by the application of the image analysis techniques. The images of different types of sample fabrics, taken through a microscope when the fabric is placed over a constant light source,transfer the problem into the image analysis domain. Indeed, porosit…
Trimethylacetic acid (TMAA) adsorption evolution on the rutile TiO 2 (110) surface from submonolayer to saturation coverages was examined at the atomic level by scanning tunneling microscopy using the same area analysis approach. Upon TMAA deprotonation, no evidence of terminal OH group formation has been found. It ha…
We have carried out an experimental and computational study on the ground- and excited-state photochemical and photophysical properties of (1-cyclohexenyl)phenyldiazene (CPD), a species formally derived from azobenzene in which one of the phenyl rings is replaced by a 1-cyclohexene substituent. The results show that C…
Current–voltage characteristics of Al lateral Schottky diodes fabricated on homoepitaxial diamond (100) films were analyzed. The currents in reverse-bias voltages smaller and larger than 3 V were well explained by the image-force lowering mechanism modified by localized-field enhancement and the thermionic-field emiss…
The divergent polyphenylene dendrimer synthesis of the largest chemically monodisperse molecules to date, up to 28 nm at 271.6 kDa for the sixth generation, is presented. Monodispersity, conformational flexibility, and an assembly behavior reminiscent of multimeric proteins for the locally stiff, macroporous dendrimer…
Abstract We present a study of the oxygen‐plasma functionalization of polyethersulphone (PES). PES samples were exposed to a weakly ionized, highly dissociated oxygen plasma, with an electron temperature of 5 eV and a positive ion density of 8 × 10 15 m −3 , and its afterglow, in which the density of charged particles…
Spin-phonon coupling and magnetodielectric effects of $\mathrm{Zn}{\mathrm{Cr}}_{2}{\mathrm{Se}}_{4}$ were investigated by means of infrared (IR) spectroscopy as functions of temperature and magnetic field. $\mathrm{Zn}{\mathrm{Cr}}_{2}{\mathrm{Se}}_{4}$ is dominated by ferro exchange but undergoes antiferro order at…
Abstract Multicompartment micelles are a new class of nanomaterials that may find wide applications in the fields of drug delivery, nanotechnology and catalysis. Due to their structural complexity, as well as the wide parameter space to explore, experimental investigations are a difficult task, to which molecular simu…
Progress in four interrelated catalysis research efforts in our laboratory are summarized: (1) catalytic photochemical functionalization of unactivated C–H bonds by polyoxometalates (POMs); (2) self-repairing catalysts; (3) catalysts for air-based oxidations under ambient conditions; and (4) terminal oxo complexes of…
Hydroxygallium phthalocyanine (HOGaPc) and cellulose (from a trimethylsilyl derivative) have been used as native elements for the preparation of a novel family of hybrid films. By spin-coating, both components allow the building of films with different configurations on various substrates in a controlled way. The part…
The phase diagram of soft spheres with size dispersion is studied by means of an optimized Monte Carlo algorithm which allows us to equilibrate below the kinetic glass transition for all size distributions. The system ubiquitously undergoes a first-order freezing transition. While for a small size dispersion the froze…
A low temperature process for transferring carbon nanotube (CNT) film from a silicon wafer to a copper surface via conductive polymer composites is proposed. The morphologies and electrical properties of the transferred CNT films were studied. An ohmic contact was formed between a CNT film and a highly conductive poly…
In the framework of density-functional theory, the structural and magnetic properties of FeN mononitride have been investigated using the all-electron augmented spherical wave method with a generalized gradient approximation functional for treating the effects of exchange and correlation. Calculation of the energy ver…
Density functional theory ab initio calculations of the structural parameters, electronic structure, carriers' effective masses, and optical absorption of orthorhombic CaSnO 3 were performed within the local density and generalized gradient approximations, LDA and GGA, respectively. A good agreement between the calcul…