Materials Literature
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Mechanoelectrical transformations are studied on models with different geometries and piezoelectric inclusion concentrations. The electrical signal intensity is found to decrease with increasing depth of a piezoelectric source relative to the position of an electrical signal detector. The electrical signal is the diff…
Chapter 6: Application of vibrational spectroscopy to the characterization of phyllosilicates and other industrial minerals J. Madejová, E. Balan and S. Petit This chapter shows how infrared (IR) and Raman spectroscopies contribute to better understanding of industrial minerals. These non-destructive techniques provid…
The biodynamics of ultrasmall and small superparamagnetic iron oxide (USPIO and SPIO, respectively) particles that were injected intraperitoneally into 36 C57BL/6 mice were investigated chronologically. Their distribution was studied histologically at six time points by measuring iron-positive areas (μm²) in organ sec…
A new aromatic organosoluble polyimide was synthesized from the 4,4′-Diaminodiphenileethane with 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) via a conventional two-stage process. This polymer showed good solubilities in N-methyl-2-pyrrolidone and m-cresol. The polyimide was characterized by FT-IR, GPC, TG…
Using first-principles calculations, we investigate the structural, electronic, and magnetic properties of Fe-terminated armchair boron nitride nanoribbons (Fe-ABNNRs). We find that Fe atoms can form a dimerized zigzag chain along the armchair edge. Different from the semiconducting H-terminated ABNNRs, the Fe-ABNNRs…
The optical properties of LaNiO3 thin films are investigated over a wide energy and temperature range. Thin films of varying thickness were grown by pulsed laser deposition on LaAlO3 and SrTiO3 substrates. The optical conductivity data of the films reveal a number of interband transitions above 1 eV, which are in good…
BACKGROUND: Peripheral nerve regeneration across large gaps is clinically challenging. Scaffold design plays a pivotal role in nerve tissue engineering. Recently, nanofibrous scaffolds have proven a suitable environment for cell attachment and proliferation due to similarities of their physical properties to natural e…
Useful contacts: A new method to achieve regular patterns generates anisotropic, “patchy” microspheres by using interfacial condensation of a liquid mask and the proximity of the particles to their neighbors to determine a mask pattern. The microspheres are separated from the scaffold and labeled with a first protein…
The production of functionalized mesoporous silicas has attracted great attention in the last years. In particular, the uses of organosilanes, as modification agents, has been largely studied due mainly to the increasing requirements deriving from the area of polymer nanocomposites, treatments of heavy metal contamina…
The atomic and electronic structures of F intercalated epitaxial graphene on a SiC(0001) substrate are studied by first-principles calculations. A three-step fluorination process is proposed. First, F atoms are intercalated between the graphene and the SiC, which restores the Dirac point in the band structure. Second,…
By using first principles calculations, we study the interlayer distance of the two-layer graphene. We use a recently developed van der Waals density functional theory (VDWDFT) as well as the local density approximation (LDA). Both methods give successful results for graphite; i.e., the calculated interlayer distances…
In this letter, we demonstrated the photoexcitation of metallic phase vanadium dioxide (VO2) with time-resolved x-ray diffraction measurements. Through the photoexcitation, the metallic phase VO2 transitioned to the similar transient state, which was presented in the insulator to metal phase transition in the time-sca…
We report on a micro-Raman investigation of inducing defects in mono-layer, bi-layer and tri-layer graphene by γ ray radiation. It is found that the radiation exposure results in two-dimensional (2D) and G band position evolution with the layer number increasing and D and D′ bands rising, suggesting the presence of de…
Using first principles calculations, we investigate the electronic and magnetic properties of BNC biribbons, a laterally-heterostructured nanoribbon constructed by joining a graphene nanoribbon (GNR) and a BN nanoribbon (BNNR) with zigzag edges. We find that the spin-polarization and electronic structures of the birib…
Absorption Equilibria............................................................................. 119 2.3.2.3 Gibbs Free Energy of Adsorption for UPD H and OPD H ............... 119 2.3.2.4 Thermochemical Data for H Underpotential Electroadsorption on Pt in Aqueous Electrolyte ........................................…
The aim of this study was to determine the pull-out properties of the para-aramid woven fabrics. Para-aramid Kevlar 29® (K29) and Kevlar 129® (K129) woven fabrics were used to conduct the pull-out tests. K29 and K129 woven fabrics had high and low fabric densities, respectively. For this reason, yarn pull-out fixture…
Fluorescence correlation spectroscopy (FCS) has been used to study the formation of large nanotube aggregates involving γ-cyclodextrin (γ-CD) and coumarin 153 (C153). It is observed that the length of a γ-CD:C153 nanotube aggregate is ∼770 nm. This is ∼480 times larger than the length of a 1:1 γ-CD:C480 complex (∼1.6…
Functional oxide films were obtained at low temperature by combination of aqueous precursors and a UV-assisted annealing process (aqueous photochemical solution deposition). For a PbTiO(3) model system, functional ferroelectric perovskite films were prepared at only 400 °C, a temperature compatible with the current Si…
The mechanism and stochastic properties of the homogeneous nucleation of dislocations have been studied. An approach has been proposed for determining the nucleation rate based on consideration of the lifetimes of a metastable state. Primary data have been obtained using the molecular dynamics method. The dependences…
We predict the collapse of a polyelectrolyte brush grafted on an electrode that is induced by applied electric fields for the limiting cases of low and high salt concentrations. The polyelectrolyte brush collapses locally to screen the charges induced on the electrodes. For low salt concentrations, the height of the p…