Materials Literature
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This review deals with recent progress on the development of nanocomposite materials formed by conducting organic polymers (COPs) and carbon nanotubes (CNs), both from a fundamental and applied point of view. The combination of the unique properties of CNs with COPs makes of these materials interesting multifunctional…
A cell adhesive peptide, Arg-Gly-Asp (RGD), was immobilized onto the surface of electrospun poly(D,L-lactic-co-glycolic acid) PLGA nanofiber mesh in an attempt to mimic an extracellular matrix structure. A blend mixture of PLGA and PLGA-b-PEG-NH(2) di-block copolymer dissolved in a 1:1 volume mixture of dimethylformam…
Abstract Biodegradable blends of amorphous poly(lactic acid) (aPLA) and polycaprolactone (PCL) and nanocomposites of these blends were developed by melt blending. A morphological study of the bioblends was carried out by means of WAXS and SEM showing immiscible behavior. The nanocomposites were also characterized morp…
Measurement of the redox potentials (E 1/2 ) of ferrocene (1), decamethylferrocene (2), decamethylcobaltocene (3), and [Fe I Cp*(η 6 -C 6 Me 6 )] (4) (Cp* = η 5 -C 5 Me 5 ) in DMF, CH 3 CN, THF, DME, CH 2 Cl 2 , and DMSO were recorded vs. the saturated calomel electrode (SCE), showing that the E 1/2 value of 1 was mor…
We present the fabrication and electrical characterization of a flexible hybrid composite structure using aligned multiwall carbon nanotube arrays in a poly(dimethylsiloxane) (PDMS) matrix. Using lithographically patterned nanotube arrays, one can make these structures at any length scale from submicrometer levels to…
Because of their brightness, photostability, and other advantages, dye-doped silica nanoparticles show great promise. Weihong Tan and colleagues at the Universities of Florida, Central Florida, and North Dakota and Hunan University (China) discuss preparation methods, practical features, and a variety of biological ap…
The DMol3 COSMO method is revisited and generalized for infinite polymer and surface models with periodic boundary conditions. The procedure works also for three dimensionally periodic solid models with internal surfaces. A new solvent accessible surface grid construction is presented, where the grid points and weight…
Carbon nanotubes (CNTs) are amongst the most explored one-dimensional nanostructures and have attracted tremendous interest from fundamental science and technological perspectives. Albeit topologically simple, they exhibit a rich variety of intriguing electronic properties, such as metallic and semiconducting behaviou…
We report multilayer nanocrystal quantum dot light-emitting diodes (QD-LEDs) fabricated by spin-coating a monolayer of colloidal CdSe/CdS nanocrystals on top of thermally polymerized solvent-resistant hole-transport layers (HTLs). We obtain high-quality QD layers of controlled thickness (down to submonolayer) simply b…
Structures and properties of liquid crystalline phases formed by bent-core molecules are reviewed. At least eight phases designated as B1–B8 have been found, being unambiguously distinguished from phases formed by usual calamitic molecules due to a number of remarkable peculiarities. In addition to B1–B8 phases, smect…
Abstract Cyclotron resonance experiments for various II–VI semiconductors (n‐ZnO, n‐ZnS, n‐ZnSe, n‐CdS, n‐CdSe, n‐CdTe) have been performed at ultra‐high magnetic fields beyond 100 T. Cyclotron resonance and impurity related resonance are observed definitely with the use of THz radiation sources, and the magnetic fiel…
Silicate glasses are among the best hosts for rare-earth ions, especially for the development of integrated optic amplifiers and lasers, due to their chemical robustness and adaptability to different waveguide fabrication process. Their application to the manufacturing of optical amplifiers, however, may be limited by…
Abstract In situ resistance evolution with pressure of anti‐perovskite nitride Cu 3 N was measured using the diamond anvil cell (DAC) technique up to 20.0 GPa at room temperature. A sharp drop of resistance from 10 5 Ω at ambient pressure to several Ω was observed in the range 3.0–10.0 GPa. This is an indication of th…
A theoretical model for understanding photomagnetism in the heptanuclear complex ${[\mathrm{Mo}(\mathrm{IV}){(\mathrm{CN})}_{2}{(\mathrm{CN}\text{\ensuremath{-}}\mathrm{Cu}L)}_{6}]}^{8+}$ perchlorate is developed. It is a many-body model involving the active orbitals on the transition metal ions. The model is exactly…
The enhancement and extinction spectra for fractal aggregates consisting of monodisperse nanosized silver particles are studied theoretically. We find the iterative solution to the coupled-dipole equations in the quasistatic approximation, taking into account a contribution of the nonlinear susceptibility ${\ensuremat…
A cluster model is proposed to describe the excitations in solid tungsten oxide. The density-functional theory approach is used to calculate the ground-state electronic structure of the model cluster and its optimum geometry; subsequently, time-dependent density-functional theory calculations are performed to obtain t…
The helical structure of the chiral nematic phases induced by chiral dopants in nematic solvents provides a macroscopic information of the molecular chirality of the dopant. Chiral dopant molecules considered in this paper are challenging systems because their twisting ability has a relatively strong dependence on the…
Changement de phase induit par broyage m�canique dans l'hydrure de magn�sium. La synth�se de l'hydrure de magn�sium par broyage r�actif m�ne � la formation d'une phase orthorhombique m�tastable (?-MgH2) en plus de la phase quadratique ?-MgH2. Les structures des phases ?-MgD2 et ?-MgD2 du MgD2 nanocristallin broy� ont…
Nuclear quadrupole resonance and SQUID-magnetometric studies on magnetic properties of bismuth(III) oxy compounds comprising neither d- nor f-elements are surveyed and systematised. The magnetic properties, not conventionally expected in the Main Group element substances, were found to exist in most of the compounds d…
We report time-dependent density functional theory calculations of the vertical excitation energies for the singlet states of three-coordinate 5H-dibenzoborole (DBB) derivatives and four-coordinate 5-fluoro-5H-dibenzoborole ion (FDBB) derivatives. These molecules show remarkable hypsochromic (blue) shifts in their flu…