Materials Literature
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Abstract Well‐defined water‐soluble fluorinated polymer nanoparticles (PNPs) with a high fluorine content and biocompatibility were successfully prepared by living radical polymerization (LRP) of 2,2,3,3‐tetrafluoropropyl methacrylate (TFPMA) from the polyamidoamine dendrimer macroinitiator (PAMAM‐Br), and successive…
Silk fibroin, one of the most promising natural materials for tissue engineering, has positive interactions with the biological environment, particularly in the field of bone and cartilage regeneration. A new approach was developed to create hydrogels from water-based fibroin solutions by applying an electric field to…
Abstract The acetylation of cellulose in ionic liquids (ILs) and the subsequent dry/wet spinning of these processing solutions were investigated. The homogeneous acetylation in ILs was carried out using different molar ratios of acetic anhydride to the anhydroglucose unit (AGU). The obtained solutions of cellulose ace…
Flächenwirkung: Die planaren Oligofurane (unten im Bild; grau C, weiß H, rot O) sind, obwohl sie keine Alkylketten tragen, relativ gut löslich, zudem noch ungewöhnlich fluoreszierend und relativ stabil. Dank dieser Eigenschaften dürften sie in Zukunft zu einer ernsthaften Konkurrenz für die Oligothiophene (oben im Bil…
Abstract Nowadays, nanoporous films are widely employed in biochemical applications or in opto‐photonic devices such as displays, solar cells, or light‐guiding systems. In particular, the technological feasibility of nanoporous layers with low refractive indices has recently enabled the development of high‐efficiency…
Abstract Canola meal proteins were solubilized from canola flour at pH 12 using sodium hydroxide solution. Proteins were then precipitated sequentially at pH values ranging from 11 to 3 in decrements of 1 pH unit. The weight distribution and the properties of these fractions were analyzed. The majority (>76%) of the r…
Abstract The nonisothermal crystallization behavior and melting characteristics of high‐density polyethylene (HDPE) in HDPE/teak wood flour (TWF) composites have been studied by differential scanning calorimetry (DSC) and wide angle X‐ray diffraction (WAXD) methods. Composite formulations of HDPE/TWF were prepared by…
Comprehensive structural studies on normal ferroelectric to relaxor crossover in $\text{Ba}({\text{Ti}}_{1\ensuremath{-}x}{\text{Zr}}_{x}){\text{O}}_{3}$ (BTZ) are performed using neutron total scattering measurements analyzed by reverse Monte Carlo modeling. In BTZ solid solution, we estimated the degree of the displ…
Looking good: High-resolution TEM can be used to determine the surface structure of a metal oxide catalyst in real space. The picture shows HR-TEM images of one catalyst particle along 〈001〉 direction far from Scherzer focus. The perimeter of the particle is highlighted by the fractured structural units.
Here, we demonstrate the energy transfer from the semiconducting polymer nanoparticles, poly( N -vinylcarbazole) (PVK), (2-(4-biphenylyl)-5-(4- tert -butylphenyl)-1,3,4-oxadiazole) (PBD), and a mixture of PVK and PBD blended polymer nanoparticles, to Au nanoparticles using steady-state and time-resolved photoluminesce…
Random networks of single-walled carbon nanotubes show promise for use in the field of flexible electronics. Nanotube networks have been difficult to utilize because of the mixture of electronic types synthesized when grown. A variety of separation techniques have been developed, but few can readily be scaled up. Desp…
Abstract Because of the very small scattering power of the light element, the crystal structures of metal borides that contain heavy metal atoms are difficult to determine unambiguously from X‐ray diffraction data only. Using neutron diffraction methods and applying them to isotopically enriched 11B boride powders, th…
Abstract Cellulose acetate (CA)‐based nanocomposites with various contents of neat multiwalled carbon nanotube (MWCNT) or acid‐treated one (MWCNT‐COOH) are prepared via melt‐compounding method and investigated their morphology, thermal stability, mechanical, and electrical properties. SEM microphotographs reveal that…
Abstract Polymorphism, a phenomenon in which a substance can have more than one crystal form, is a frequently encountered phenomenon in pharmaceutical compounds. Different polymorphs can have very different physical properties such as crystal shape, solubility, hardness, color, melting point, and chemical reactivity,…
Comprehensive in vivo biodegradability and biocompatibility of unmodified and Arg-Gly-Asp (RGD) peptide-modified PEG/sebacic acid-based hydrogels were evaluated and compared to the control material poly(lactide-co-glycolide) (PLGA) using a cage implantation system, as well as direct subcutaneous implantation for up to…
We have investigated the stability of O-polar $\text{ZnO}\text{ }(000\overline{1})\text{\ensuremath{-}}(1\ifmmode\times\else\texttimes\fi{}1)$ surfaces with photoemission spectroscopy and low-energy electron diffraction. We present direct evidence of quasi-two-dimensional electron gas (2DEG) formation $({N}_{2D}\ensur…
Abstract We propose a novel alloy system of oxide semiconductors promising for unique multifunctions, the corundum structured Ga2O3‐Cr2O3‐Fe2O3 alloys on sapphire substrates. With this system the optical band gap can be widely tuned from 2.2 to 5.3 eV while keeping the acceptable lattice mismatch. A key issue was to f…
Dielectric and Mossbauer studies of Pb1-xAxFe1/2Nb1/2O3 (A- Ba, Ca) ceramic compositions show that the Néel temperature in these solid solutions drops down at x ≈ 0.15–0.20. At the same threshold the polarization also loses its long-range order and compositions with x > 0.1 exhibit relaxor behavior. The data obtained…
A facile and robust route for the pre-synthesized Fe(3)O(4) nanoparticles (NPs) exclusively assembled on both sides of reduced graphene oxide (RGO) sheets with tunable density forming two-dimensional NPs composite membranes is developed in solution. The assembly is driven by electrostatic attraction, and the nanocompo…
High-spin organic structures can be obtained from fused polycyclic hydrocarbons, by converting selected peripheral HC(sp(2)) sites into H(2)C(sp(3)) ones, guided by Ovchinnikov's rule. Theoretical investigation is performed on a few examples of such systems, involving three to twelve fused rings, and maintaining three…