Materials Literature
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Smoothed dissipative particle dynamics (SDPD) is a novel coarse grained method for the numerical simulation of complex fluids. It has considerable advantages over more traditional particle-based methods. In this paper we analyze the self-diffusion coefficient D of a SDPD solvent by using the strategy proposed by Groot…
Rationally designed peptide biosurfactant AM1 was mixed with sodium dodecyl benzene sulfonate (SDOBS) to self-assemble a mixed surfactant-biosurfactant layer at the air-water interface. Under optimal conditions in the presence of Zn2+, the interfacial elasticity of the mixed layer was approximately 5-fold higher than…
The dipeptides alanyl-glycine ethyl ester, valinyl-glycine ethyl ester, and phenylalanyl-glycine ethyl ester were synthesized by mixed anhydride solution-phase peptide reactions. The free N-terminus was used as a reactive site for nucleophilic replacement of the chlorine atoms in poly(dichlorophosphazene). The C-termi…
The oriented attachment (OA) mechanism has been investigated as an important process in the formation of anisotropic nanostructures such as depicted. The results showed that the control of a desired phase in this system may be attained by the control of OA mechanism through pH value, obtaining several morphologies.A n…
Abstract Blends of the biodegradable polycaprolactone (PCL) and multiwalled carbon nanotubes (MWNTs) were prepared by means of a melt blending method. To conquer the poor compatibility between PCL and MWNTs, the acrylic acid grafted polycaprolactone (PCL‐ g ‐AA) and the multihydroxyl functionalized MWNTs (MWNTs‐OH) we…
Photochromic sexithiophenes were prepared by oxidative electrochemical coupling of terthiophenes. The redox properties in the open state are typical of sexithiophenes. Ring closure of both photochromic units leads to a decrease in the energy of the LUMO orbitals with little affect on the energy of the HOMO orbitals. T…
We report a density-functional calculation that predicts for iron(II) phthalocyanine (FePc) an unusual orbitally degenerate intermediate-spin ground state ${^{3}E}_{g}$. The calculated $\text{Fe}\text{ }{L}_{2,3}$ near-edge x-ray absorption spectrum agrees reasonably with experiment, whereas the presence of an unquenc…
Alditol bearing chitosans have shown the ability to reduce silver ions in mild conditions and without addition of exogenous reducing agents. The ion reduction induces the formation of a lactone moiety on the polysaccharide (Fetizon reaction) without causing C-C bond cleavage on the polyol. The close and multivalent ar…
Quantum dots ordered in regular lattices, called quantum-dot superlattices, offer numerous possibilities for the creation of novel materials. The formation of such structures during multilayer deposition has been studied and explained satisfactorily only in crystalline materials. Here we are reporting the spontaneous…
To better understand the growth mechanism leading to enhanced anisotropy in nanocrystal heterostructures synthesized from nearly spherical seeds, we have examined various factors that contribute to structural diversification in Fe(3)O(4)/CdS systems. Pseudoseparation of nucleation and growth allows us to quantify how…
Spectroscopic ellipsometry is used to determine the dielectric function of superconducting LaFeAsO0.9F0.1 (T_{c}=27 K) and undoped LaFeAsO polycrystalline samples in the wide range 0.01-6.5 eV at temperatures 10< or =T< or =350 K. The charge carrier response in both samples is heavily damped. The spectral weight trans…
Iridescent structures are some of the most visually stunning phenomena in biological organisms. Insects and birds have in common the display of such colours in their non-living investiture, the scales and bristles in insects and the feathers in birds. The biological mechanisms underlying the formation of these structu…
Abstract Know your bacteria! Two fluorene‐based, conjugated polymers with oligo(ethylene glycol)‐ and poly(ethylene glycol)‐tethered spacers have been prepared by the Suzuki coupling polymerization reactions. β‐Glucose and α‐mannose residues were covalently attached to the conjugated polymers by post‐polymerization fu…
Abstract Die Anwendung nanotechnologischer Konzepte in der Medizin verbindet zwei große interdisziplinäre Wissenschaftsgebiete mit einem beispiellosen sozialen und ökonomischen Potenzial. Diese Nanomedizin nutzt die Errungenschaften beider Forschungsfelder, wobei die gemeinsame Basis die Untersuchung spezifischer Eige…
This paper presents a controlled, large scale fabrication of mesoporous ZnO thin films. The entire ZnO mesoporous film is one piece of a single crystal, while high porosity made of nanowalls is present. The growth mechanism was proposed in comparison with the growth of ZnO nanowires. The ZnO mesoporous film was succes…
The combined local structure techniques, extended x-ray absorption fine structure and neutron pair distribution function analysis, have been used for temperatures $4\ensuremath{\le}T\ensuremath{\le}330\text{ }\text{ }\mathrm{K}$ to rule out a large Jahn-Teller (JT) distortion of the Co-O bond in ${\mathrm{La}}_{1\ensu…
Abstract A series of castor‐oil‐modified hyperbranched polyurethanes were synthesized via an A 2 + B 3 approach based on castor oil, macroglycol poly(ϵ‐caprolactone)diol or poly(ethylene glycol) (PEG), and diphenyl methane diisocyanate, with or without a chain extender. The yield of the product was 95%, and the polyme…
Magnetically functionalized mesoporous silica spheres with different size (average diameter, A.D.) from 150 nm to 2 μm and pore size distribution were synthesized by generating magnetic Fe x O y nanoparticles onto the mesoporous silica hosts using the sol−gel method. The X-ray diffraction (XRD), field emission scannin…
A focused laser beam is used to heat individual single-walled carbon nanotube bundles bridging two suspended microthermometers. By measurement of the temperature rise of the two thermometers, the optical absorption of 7.4-10.3 nm diameter bundles is found to be between 0.03 and 0.44% of the incident photons in the 0.4…
Large-scale, high-purity, and uniform one-dimensional Ag 2 MO 4 (M = Cr, Mo, and W) were obtained by a facile hydrothermal method. The as-prepared Ag 2 MO 4 materials exhibited linear current−voltage ( I − V ) characteristics and excellent photoresponse. As the light source was switched on and off, the currents could…