Materials Literature
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Gene delivery systems face the problem not only of the route toward the cell and tissues in question, but also of the molecularly crowded environment of both the cytoplasm and the nucleus itself. One of the physical barriers in the cytoplasm for diffusing nanoparticles is an actin network. Here, we describe the findin…
The functional properties of Mn-doped Ge depend to large extent on the lattice location of the Mn impurities. Here, we present a lattice location study of implanted diluted Mn by means of electron emission channeling. Surprisingly, in addition to the expected substitutional lattice position, a large fraction of the Mn…
Abstract Hydrogels containing carbon nanotubes (CNTs) are expected to be promising conjugates because they might show a synergic combination of properties from both materials. Most of the hybrid materials containing CNTs only entrap them physically, and the covalent attachment has not been properly addressed yet. In t…
First-principle density functional theory is used for studying the anion gold clusters doped with magnesium atom. By performing geometry optimizations, the equilibrium geometries, relative stabilities, and electronic and magnetic properties of [Au(n)Mg]⁻ (n = 1-8) clusters have been investigated systematically in comp…
Abstract A Cu(II)–poly( N ‐vinylimidazole) (PVI) complex was prepared and used to catalyze the oxidative polymerization of 2,6‐dimethylphenol (DMP) to form poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) in water. The stoichiometric ratio between imidazole groups in PVI and copper ions was found to be 4 when continuous v…
Apatite-type La(9.33)(SiO(4))(6)O(2) hollow nanoshells were successfully synthesized by a controlled route. These oxide-ion-conducting hollow nanoshells were used to catalyze oxidative coupling of methane, and an enhanced catalytic performance at relatively low temperature was realized. The high-activity and energy-sa…
Despite the continuous interest in organogels and hydrogels of low molecular weight gelators (LMWG), establishing the relationship between the molecular structure and the gelation mechanism is still a challenge. In this paper our interest focuses on the consequences of slight molecular modifications on the self-assemb…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Koshi Okamura, Horst Hahn; Carrier transport in nanocrystalline field-effect transistors: Impact…
Abstract Two new solid solutions Li 2– x La (1+ x )/3 □ (2 x –1)/3 B 2 O 6 F (B = Ta, Nb) have been synthesized in powder form by solid‐state synthesis. Their composition domain corresponds to 0.6 ≤ x ≤ 1.1 for the Ta compounds and to 0.7 ≤ x ≤ 1.0 for the Nb compounds. The structural study has been performed by XRD o…
Collagens are widely used in medical applications, including as a scaffold for tissue regeneration. However, animal-derived collagens have several drawbacks, such as low thermal stability, nonspecific cell adhesion, antigenicity, and contamination with pathogenic substances. To overcome these problems, we chemically s…
Transport and noise measurements of multiwall carbon nanotubes in high-density polyethylene matrix are reported. In these composites current transport occurs through a random tunnel junctions network, formed by adjacent carbon nanotubes. Low-frequency noise investigations reveal a 1/f behavior induced by resistance fl…
Abstract The effect of processing method and condition on the dispersion status of multiwalled carbon nanotubes (MWCNTs), and mechanical properties of the MWCNT/polyamide 6 (PA6) composites are investigated. Different melt processing conditions are used to dilute the master batch produced by melt process or in situ po…
Abstract We report first‐principles studies on the electronic and vibrational properties of uniaxially strained graphene and graphene nanoribbons. The band structure of extended graphene shows an interesting behavior under uniaxial strain in directions other than the zigzag or armchair direction. While strained graphe…
Abstract The aim of this study was to determine the effect of removing extractives from the woody core of hemp (chènevotte) on the chain mobility of hemicelluloses and lignins, which can react during technological transformation such as de-fibering and/or composite materials production. Extractives are molecules with…
The influence of adsorbates on the electronic and magnetic properties of graphane possessing the H-vacancy defects was investigated using the quantum-chemistry methods. We found that the H vacancies in graphane significantly improve its chemical reactivity to environment due to the unpaired electron left on the vacanc…
We have presented an analytic thermodynamic model to elucidate the mechanism of receptor-mediated endocytosis of nanoparticles (NPs) and provided a simple method to evaluate the optimal size of NPs by minimizing the kinetic diffusion time of the free receptors around the bound region toward the contact surface with NP…
Abstract The polymerization of propylene was carried out with an MgCl 2 ‐supported TiCl 4 catalyst (with diisobutyl phthalate as an internal donor) in the absence and presence of hydrogen (H 2 ) as a chain‐transfer agent. Different structures of alkylaluminum were used as cocatalysts. The effects of the alkyl group si…
The normal state properties of the recently discovered ferropnictide superconductors might hold the key to understanding their exotic superconductivity. Using point-contact spectroscopy we show that Andreev reflection between an epitaxial thin film of Ba(Fe(0.92)Co(0.08))₂As₂ and a silver tip can be seen in the normal…
Using a two-orbital model of the superconducting phase of the pnictides, we compute the spectrum of the Leggett mode---a collective excitation of the phase of the superconducting gap known to exist in multigap superconductors---for different possible symmetries of the superconducting order parameter. Specifically, we…
CdSnO(3) ilmenite and perovskite crystals were investigated using both the local density and generalized gradient approximations, LDA and GGA, respectively, of the density functional theory (DFT). The electronic band structures, densities of states, dielectric functions, optical absorption and reflectivity spectra rel…