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High-density liquid-crystalline azobenzene polymer brush attained by surface-initiated ring-opening metathesis polymerization.
High-density polynorbornene azobenzene liquid-crystalline brushes are synthesized on quartz substrates by surface-initiated ring-opening metathesis polymerization (SI-ROMP) using Grubbs third-generation catalyst. The grafting process is controlled over the thickness of the brush from a solid-support...
Self-destructing "mothership" capsules for timed release of encapsulated contents.
We describe a new class of hierarchical containers that are formed via single-step assembly and, at a later time, self-destruct because of their packaged contents. These containers are spherical capsules formed by electrostatic complexation of the anionic biopolymer, gellan gum, with the cationic bi...
Transient colloidal stability controls the particle formation of SBA-15.
We argue that the interface between the flocs and surrounding media is covered by Pluronic-molecules, which provide steric stabilization. As the flocs grow the coverage of polymers at the interface is increased until a stable size is reached, and that regulates the particle size. By targeting the ch...
2D "Soap"-Assembly of Nanoparticles via Colloid-Induced Condensation of Mixed Langmuir Monolayers of Fatty Surfactants.
Interface induced crystal structures of dioctyl-terthiophene thin films.
Temperature dependent structural and morphological investigation on semiconducting dioctyl-terthiophene (DOTT) thin films prepared on silica surfaces reveals the coexistence of surface induce order and distinct crystalline / liquid crystalline bulk polymorphs. X-ray diffraction and s...
Structural Evolution during geopolymerization from an early age to consolidated material.
Time resolved rheology, Small Angle X-ray Scattering (SAXS) and Electron Paramagnetic Resonance (EPR) techniques were used to study the polymerization of geopolymers. These polymers are inorganic synthesized by alkaline activation of an aluminosilicate source (metakaolin) in aqueous...
Behavior of double emulsions in a cross-type optical separation system.
The behavior of double emulsions in a cross-type optical particle separation system was studied for different combinations of the refractive indices and different inner and outer layer radii. The radii and refractive indices of the double emulsions were easily adjusted by taking adva...
Impact of membrane fluidity on steric stabilization by lipopolymers.
In this work, the impact of lipid lateral mobility on the steric interaction between membranes containing polyethylene glycol (PEG) functionalized lipids was investigated using the Surface Force Apparatus. The force-distance profiles show the presence of electrostatic and steric repu...
Meso- and Macro-porous Brookite Thin Films having Large Thermal Stability Range.
We have used a layer-by-layer approach to generate a meso-porous Ag doped brookite structure at 500 °C with 95 % composition by XRD. This tightly packed meso-porous structure can be described as striated grains of brookite protruding from the surface to form an interlocked network whose thermal sta...
A new incorporation mechanism for trivalent actinides into bioapatite: a TRLFS and EXAFS study.
We propose a new incorporation mechanism for trivalent actinides and lanthanides into synthetic and biologically produced hydroxyapatite. Time-resolved laser fluorescence spectroscopy and extended X-ray absorption fine structure have been used to demonstrate that trivalent actinides and lanthanides...