Bitan-Cherbakovsky, Liron; Aserin, Abraham; Garti, Nissim
The effect of dendrimer generations on the structure of Q G LLC mesophase and drug release
In this paper the cosolubilization of 2nd, 3rd, and 4th generations of polypropyleneimine (PPI: PPI-G2, -G3, and -G4) dendrimers with sodium diclofenac (Na-DFC) into reverse gyroid cubic (QG) liquid crystals is reported. Structural properties and interactions of PPI dendrimers with and without the drug were studied using small-angle X-ray scattering,…
Nematic Ordering of SWNT in Meso-Structured Thin Liquid Films of Polystyrenesulfonate
Itzhak-Cohen, Racheli; Nativ-Roth, Einat; Levi-Kalisman, Yael; Josef, Elinor; Szleifer, Igal; Yerushalmi-Rozen, Rachel
The formation of nematic-like islands of single-walled carbon nanotubes (SWNT) in polystyrenesulfonate (PSS) dispersions confined into nanometrically thin films is reported. The SWNT are observed to assemble into orientationally ordered phases, where the intertube distance, as measured via transmission electron microscopy at cryogenic temperatures, matches the polyelectrolyte?s bulk correlation…
A new crystallization process in polypropylene highly filled with calcium carbonate
Schawe, Jürgen E. K.; Vermeulen, Paul A.; Drongelen, Martin van
The influence of high amounts of calcium carbonate filler on the crystallization behavior of polypropylene (PP) is investigated by differential scanning calorimetry (DSC) and fast scanning DSC measurements. The non-isothermal crystallization process at industrially relevant cooling rates of about 100 K/s is significantly influenced by the calcium carbonate filler. Isothermal…
Reduced Phase Separation and Slowing of Dynamics in Polyurethanes with Three-Dimensional POSS-Based Cross-Linking Moieties
Raftopoulos, Konstantinos N.; Koutsoumpis, Stefanos; Jancia, Małgorzata; Lewicki, James P.; Kyriakos, Konstantinos; Mason, Harris E.; Harley, Stephen J.; Hebda, Edyta; Papadakis, Christine M.; Pielichowski, Krzysztof; Pissis, Polycarpos
Octa-OH-functional POSS has been incorporated into a model polyurethane elastomer as a comparatively massive and notionally ?robust? 3-dimensional cross-linking core. The effects of this cross-linking moiety on the morphology and molecular dynamics of the system are studied over a range of size and time scales. Microscopy, scattering, spectroscopic, thermal, and…
Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: effect of vertical correlation
Paul, Amitesh; Paul, Neelima; Müller-Buschbaum, Peter; Bauer, Andreas; Böni, Peter
Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular magnetic anisotropy. A distinct signature of regular near-neighbour ordering is observed, which is commonly observed in patterned nanostructures.…
Potential Determining Salts in Microemulsions: Interfacial Distribution and Effect on the Phase Behavior
Johans, Christoffer; Behrens, Manja A.; Bergquist, Karl Erik; Olsson, Ulf; Manzanares, José A.
In this work we consider potential determining salts, also referred to as phase transfer agents for a future objective of electrochemistry at the oil?water interface in microemulsions. We have studied these salts, composed of a hydrophilic and a hydrophobic ion, in microemulsion stabilized by nonionic surfactants with an oligo ethylene…
Intercalation of cellulase enzyme into a hydrotalcite layer structure
Zou, N.; Plank, J.
A new inorganic–organic hybrid material whereby cellulase enzyme is incorporated into a hydrotalcite type layered double hydroxide (LDH) structure is reported. The Mg2Al–cellulase–LDH was synthesized via co-precipitation from Mg/Al nitrate at pH=9.6. Characterization was performed using X-ray powder diffraction (XRD), small angle X-ray scattering (SAXS), elemental analysis, infrared spectroscopy…
Grazing incidence X-ray scattering showing self-organized regular three-dimensional nanopillar-like structures
Paul, Amitesh; Paul, Neelima
Self-organized Co nanoclusters are grown by sequential sputtering in the form of nanopillars separated by Au. Using grazing incidence small angle X-ray scattering from these nanopillar-like structures, we could observe a distinct signature of regular near-neighbor ordering of the first order, commonly observed only in patterned nanostructures. The magnetic response…
Chiroptical Activity in Silver Cholate Nanostructures Induced by the Formation of Nanoparticle Assemblies
Layani, Muriel E.; Ben Moshe, Assaf; Varenik, Maxim; Regev, Oren; Zhang, Hui; Govorov, Alexander O.; Markovich, Gil
We report on an interesting mechanism of inducing chiroptical response at plasmonic silver nanoparticles (NPs) through the formation of plasmonic hot spots in small metal-NP?chiral-surfactant assemblies. Circular dichroism (CD) was measured at the surface plasmon resonance of cholate-coated silver nanostructures (AgCT) in the visible region of the spectrum. Low temperature…
Study of liquid-phase molecular packing interactions and morphology of fatty acid methyl esters (biodiesel)
Berman, Paula; Meiri, Nitzan; Colnago, Luiz A.; Moraes, Tiago B.; Linder, Charles; Levi, Ofer; Parmet, Yisrael; Saunders, Michael; Wiesman, Zeev
Biotechnology for Biofuels, 2015, vol 8, 1, pp. 12DOI:10.1186/s13068-014-0194-7AbstractPMID: 25688289Visit the full articleBack to the overview