Materials Literature
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Polimide-block-polydimethylsiloxane (PI-b-PDMS) block copolymers have been synthesized from commercially available amino-terminated polysiloxanes with different molecular weights, for use as polymeric materials resistant to the low earth orbit (LEO) space environment. A structural optimization with respect to maximum…
The electronic structure of complex oxides is important for the understanding of their functional properties. In this paper, the electronic structures of the multiferroic perovskite bismuth ferrite $({\text{BiFeO}}_{3})$ and the related isostructural compounds ${\text{Bi}}_{0.9}{\text{La}}_{0.1}{\text{FeO}}_{3}$ and $…
In this study, drug carrier properties through skin and penetration enhancement effects of carbon nanotubes (CNTs) are presented. Multi-walled and double-walled carbon nanotubes were used. Penetration enhancement into the skin following passive diffusion and iontophoresis were determined. Possible solubility enhanceme…
We have studied the effect of Au intercalation on the atomic and electronic structure of the graphene/Ni(111) surface by using density functional theory calculations. Our calculations demonstrate that (1) Au atoms energetically favor interface intercalation over surface adsorption, (2) Au intercalation drastically cha…
Combined quantum mechanics/molecular mechanics (QM/MM) calculations with high levels of correlated ab initio theory can now provide benchmarks for enzyme-catalyzed reactions. Here, we use such methods to test various QM/MM methods and the sensitivity of the results to details of the models for an important enzyme reac…
Epoxy foams were produced by means of solid-state foaming and their shape memory properties were evaluated together with other physical properties. Solid-state foaming consists of pressing thermosetting resin powders to produce solid tablets, heating the tablets at high temperature to generate both the formation of po…
Well-defined dialkylgallium alkoxides derived from ( S )-methyl lactate, ( S,S )-[Me 2 Ga(μ-OCH(Me)CO 2 Me)] 2 ( 1 ), and 2-methoxyethanol, [Me 2 Ga(μ-OCH 2 CH 2 OMe)] 2 ( 2 ), have been used as model complexes for the ring-opening polymerization of lactide. ( S,S )-[Me 2 Ga(μ-OCH(Me)CO 2 Me)] 2 ( 1 ) can polymerize r…
The objective of this work is to demonstrate the feasibility of fabrication of cross-linked polyethyleneimine microfibers by a reactive photo-electrospinning technology. Linear polyethyleneimine (L-PEI) has been grafted with cross-linkable methacrylate moiety by reaction with glycidyl methacrylate (GMA), enabling the…
Long-length nanofibers are able to form porous networks with high surface-area-to-volume ratios, and decrease diffusion lengths. While there are numerous techniques to create nanostructures, electrospinning is the only technique that allows fabrication of nanofibers at long-length scales. These uniquely shaped fibers…
Octaphenylsilsesquioxane (OPS) derivatives represent a class of high functionality building blocks with perfect three-dimensional symmetry for the construction of rigid and highly porous polymers. Copper-mediated in-situ homocoupling of an OPS derivative with eight para-disposed triple bonds yields a porous network wi…
Using neutron reflectivity, the internal structure of polyelectrolyte multilayers is described on the nanoscale. Each film consists of a protonated and a deuterated block, built from x protonated and y deuterated polycation/polyanion bilayers, respectively. The number of bilayers N = x + y is kept constant; the positi…
In this article, direct coating of ZnO on PECVD-grown multi-walled carbon nanotubes (MWCNTs) is achieved using atomic layer deposition (ALD). Transmission electron microscopy investigation shows that the deposited ZnO shell is continuous and uniform, in contrast to the previously reported particle morphology. The ZnO…
This paper deals with the characterization of a broad range of linear polyethylenes (PE) by means of thermorheology. It is demonstrated, in which way the thermorheological behavior can be related to the comonomer type and content of copolymers. In the first part of this paper, well-established analytical and rheologic…
The authors report on the quantum efficiency (QE) of UV-excited photoluminescence measured in SnO–ZnO–P 2 O 5 glass developed as rare earth (RE)-free material for light emitting diode (LED) applications; we report what is, to the best of our knowledge, the highest value of QE ever reported. It is notable that the QE v…
Core-sheath multiwalled carbon nanotube (MWNT)-cellulose fibers of diameters from several hundreds of nanometers to several micrometers were prepared by coaxial electrospinning from a nonvolatile, nonflammable ionic liquid (IL) solvent, 1-methyl-3-methylimidazolium acetate ([EMIM][Ac]). MWNTs were dispersed in IL to f…
The effect of grafting density on the phase transition behavior of poly( N -isopropylacrylamide) (PNIPAM) grafted onto a flat substrate was investigated using an atomic force microscope (AFM) and a quartz crystal microbalance (QCM-D). We prepared PNIPAM brush layers at three different grafting densities on silicon waf…
Since its role in the prevention of osteoporosis in humans was proven some 30 years ago, calcium bioavailability has been the subject of numerous scientific studies. Recent technology allowing the production of a stable amorphous calcium carbonate (ACC) now enables a bioavailability analysis of this unique form of cal…
We investigate the electromagnetic response of the concentric multi-ring, or the bull's eye, structure as an extension of the dual-ring metamaterial which exhibits electromagnetically-induced transparency (EIT)-like transmission characteristics. Our results show that adding inner rings produces additional EIT-like pea…
UNLABELLED: PURPOSE/INTRODUCTION: The aim of this study was to determine the T1 relaxivities (r1) of 8 gadolinium (Gd)-based MR contrast agents in human blood plasma at 7 Tesla, compared with 3 Tesla. SUBJECTS AND METHODS: Eight commercially available Gd-based MR contrast agents were diluted in human blood plasma to c…
Metal-templated [2 + 3]-type cocondensation of a pi-extended boronic acid and nioxime furnished a series of cage molecules, which were electropolymerized to prepare metal-containing conducting polymers (MCPs). Despite sharing essentially isostructural organic scaffolds, these materials display metal-dependent electroc…