Materials Literature
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Poly(N-isopropyl acrylamide) (pNIPAM) is one of the most popular stimulus-responsive polymers for research. It is especially of great interest in the field of tissue engineering. While it is known that the NIPAM monomer is toxic, there is little conclusive research on the cytotoxicity of the polymer. In this work, the…
A comprehensive study of the room-temperature electrical and electrothermal transport of single-crystalline indium oxide (In${}_{2}$O${}_{3}$) and indium tin oxide (ITO) films over a wide range of electron concentrations is reported. We measured the room-temperature Hall mobility ${\ensuremath{\mu}}_{H}$ and Seebeck c…
Unusually long thermal half-lives of perhalogenated cis-azobenzenes enabled their structural characterization and the first evidence of a crystal-to-crystal cis → trans azobenzene isomerization. Irradiation with visible light transforms a perhalogenated cis-azobenzene single crystal into a polycrystalline aggregate of…
One dimensional polyaniline nanowire is an electrically conducting polymer that can be used as an active layer for sensors whose conductivity change can be used to detect chemical or biological species. In this review, the basic properties of polyaniline nanowires including chemical structures, redox chemistry, and me…
Macromolecules containing N-diazeniumdiolates of secondary amines are proposed scaffolds for controlled nitrogen oxide (NO) release medical applications. Preparation of these compounds often involves converting primary amine groups to secondary amine groups through N-alkylation. However, N-alkylation results in not on…
Semiempirical tight binding (TB) and density functional theory (DFT) methods have been used to study the mechanism of single walled carbon nanotube (SWNT) growth. The results are compared with similar calculations on graphene. Both TB and DFT geometry optimized structures of relevance to SWNT growth show that the mini…
Poly(L-lactide) (PLA) is known to eventually be degraded into water and carbon dioxide by the microorganisms of the natural world. Titanium dioxide (TiO2) has been used in the biomedical and bioengineering fields as a photocatalyst. The purpose of this research project is to evaluate the influence of TiO2 added to PLA…
Procedures for producing silica nanoparticles suitable for further amino functionalization and subsequent decoration with silica beads were investigated in a comparative way. Several methods, one based on tetrapropylammonium hydroxide, the classical Stöber synthesis, and two with amino acids (either lysine or arginine…
Gd(1-x)VO4:Tb3+ phosphor powders were synthesized with different Tb3+ concentrations by using a solid-state reaction method. The effects of Tb3+ concentrations on the structural, morphological, photoluminescence, and photoluminescence excitation properties of the Tb(3+)-doped GdVO4 phosphors were investigated. XRD dat…
We report the synthesis of TiO2 nanowires with high aspect ratio using a two step hydrothermal process using TiO2 nanoparticles and 10 M NaOH solvent at a reaction temperature of 180 degrees C. These nanowires are characterized by field emission scanning electron microscope (FE-SEM), transmission electron microscope (…
Ein lyotropes Analogon zur ferroelektrischen smektischen C*-Phase wurde erstmals gefunden. Die lyotrope smektische C*-Phase zeigt makroskopische Chiralitätseffekte, z. B. einen helikalen Grundzustand und polaritätsabhängiges elektrooptisches Schalten, was auf das Vorhandensein einer spontanen elektrischen Polarisation…
The range of applications of cellulose, a glucose-based polysaccharide, is limited by its inherently poor mechanical properties. The grafting of synthetic polymer chains by, for example, a "grafting from" process may provide the means to broaden the range of applications. The nitroxide-mediated polymerization (NMP) me…
Au nanoparticles coated with glutathione (GSH) were prepared by the heat-assisted reduction of Au(I)-thiol complex at 1:1 or 5:4 molar ratio of Au to GSH. The 1:1 sample has three emissions at 610, 645 and 800 nm while the 5:4 sample has a dominant emission at 800 nm but the two emissions at 610 and 645 nm are very we…
BACKGROUND: The area of biodegradable/sustainable polymers is one of increasing importance in the 21st Century due to their positive environmental characteristics. Lewis acidic metal centres are currently one of the most popular choices for the initiator for the polymerisation. Thus, in this paper we report the synthe…
(La,Sr)MnO3 (LSMO) nanolayers with various crystallographic textures were grown on the sapphire substrate with and without In2O3 epitaxial buffering. The LSMO nanolayer with In2O3 epitaxial buffering has a (110) preferred orientation. However, the nanolayer without buffering shows a highly (100)-oriented texture. Deta…
A novel hierarchical nanotemplated carbon monolithic rod (NTCM) was prepared using a novel facile nanotemplating approach. The NTCM was obtained using C60-fullerene modified silica gels as hard templates, which were embedded in a phenolic resin containing a metal catalyst for localized graphitization, followed by bulk…
The aim of this work is to study the influence of electron beam irradiation on the structure of polypropylene (PP)/polybutene‐1 (PB‐1) blend in the branching process. The blend with 10 wt% of PB‐1 and 0.5 wt% trimethylolpropane trimethacrylate monomer is prepared and irradiated at different doses. The rheological prop…
A MEMS lamination technology based on sequential multilayer electrodeposition is presented. The process comprises three main steps: (1) automated sequential electrodeposition of permalloy (Ni 80 Fe 20 ) structural and copper sacrificial layers to form multilayer structures of significant total thickness; (2) fabricati…
Water-soluble magnetite nanoparticles were synthesized by thermal decomposition of iron(III) acetylacetonate in poly(ethylene glycol) in the presence of poly(ethylene imine). The amount of poly(ethylene imine), the reaction temperature and time are found to have significant effects on the shape evolution and size dist…
Three representative polymers of increasing modulus, poly(d,l-lactic acid), PDLLA, poly(desaminotyrosyl-tyrosine ethyl ester carbonate), PDTEC, and the same polymer with iodinated DTE segments, PI2DTEC, were characterized by surface-pressure versus area (Π-A) isotherms and surface sensitive X-ray diffraction technique…