Nagarajan, S.; Deepthi, Krishnan; Gowd, E. Bhoje
Structural evolution of poly(l-lactide) block upon heating of the glassy ABA triblock copolymers containing poly(l-lactide) A blocks
Two triblock ABA copolymers poly(l-lactide-b-dimethylsiloxane-b-l-lactide) (PLLA-b-PDMS-b-PLLA) and poly(l-lactide-b-ethylene glycol-b-l-lactide) (PLLA-b-PEG-b-PLLA) containing poly(l-lactide) were synthesized by ring opening polymerization of l-lactide using bis(hydroxyalkyl) terminated PDMS and hydroxyl end-capped polyethylene glycol as macroinitiators, respectively. Both the triblock…
Structural Diversity and Phase Behavior of Brush Block Copolymer Nanocomposites
Song, Dong-Po; Gai, Yue; Yavitt, Benjamin M.; Ribbe, Alexander; Gido, Samuel; Watkins, James J.
Macromolecules, 2016, vol 49, 17, pp. 6480–6488DOI:Visit the full articleBack to the overview
Structural characterization of multilamellar liposomes coencapsulating curcumin and vitamin D3
Chaves, Matheus Andrade; Oseliero Filho, Pedro Leonidas; Jange, Camila Garcia; Sinigaglia-Coimbra, Rita; Oliveira, Cristiano Luis Pinto; Pinho, Samantha Cristina
This study aimed the production of multilamellar liposomes coencapsulating two hydrophobic bioactives, curcumin and vitamin D3, which present antioxidant and nutraceutical properties. Liposomes were produced by proliposomes hydration and stabilized with a mixture of xanthan and guar gums. Proliposomes were produced by coating of micronized sucrose method. Physicochemical properties of…
Strengthening mechanisms in Fe-Al based ferritic low-density steels
Pramanik, Sudipta; Koppoju, Suresh; Anupama, A. V.; Sahoo, Balaram; Suwas, Satyam
Low-density steels with different aluminium contents have been investigated with an aim to examine the occurrence of different strengthening mechanisms leading to its higher strength. A composition corresponding to 6.8wt% aluminium has been studied to understand the underlying strengthening mechanisms. Different factors contributing to the strengthening mechanisms have been separately…
Stretching temperature dependence of the critical strain in the tensile deformation of polyethylene copolymer
Liao, Tao; Jiang, Zhiyong; Li, Rui; Gao, Yuxin; Men, Yongfeng
The deformation behavior and structural evolution of the quenched ethylene-butene copolymer under uniaxial loading and unloading were investigated as a function of stretching temperature using step-cycle tests, in situ small angle X-ray scattering (SAXS), and wide angle X-ray diffraction (WAXD) measurements. The true stress-strain curves together with detailed analysis of…
Star-Shaped Poly(l-lactide) with a Dipyridamole Core: Role of Polymer Chain Packing on Induced Circular Dichroism and Photophysical Properties of Dipyridamole
Nagarajan, Selvaraj; Gowd, E. Bhoje
The dipyridamole is emissive in the solution state; however, the emission is weakened in the solid state due to the aggregation-caused quenching. The aggregation of dipyridamole can be prevented by synthesizing star-shaped poly(l-lactide) (SSPLLA) using dipyridamole core. During crystallization of the polymer, chromophore molecules were expelled out of crystalline lamellae…
Spontaneous Structural Transition in Phospholipid-Inspired Aromatic Phosphopeptide Nanostructures
Pellach, Michal; Atsmon-Raz, Yoav; Simonovsky, Eyal; Gottlieb, Hugo; Jacoby, Guy; Beck, Roy; Adler-Abramovich, Lihi; Miller, Yifat; Gazit, Ehud
Phospholipid membranes could be considered a prime example of the ability of nature to produce complex yet ordered structures, by spontaneous and efficient self-assembly. Inspired by the unique properties and architecture of phospholipids, we designed simple amphiphilic decapeptides, intended to fold in the center of the peptide sequence, with a…
Spinning Hierarchical Gold Nanowire Microfibers by Shear Alignment and Intermolecular Self-Assembly
Reiser, Beate; Gerstner, Dominik; Gonzalez-Garcia, Lola; Maurer, Johannes H. M.; Kanelidis, Ioannis; Kraus, Tobias
Hierarchical structures lend strength to natural fibers made of soft nanoscale building blocks. Intermolecular interactions connect the components at different levels of hierarchy, distribute stresses, and guarantee structural integrity under load. Here, we show that synthetic ultrathin gold nanowires with interacting ligand shells can be spun into biomimetic, free-standing microfibers.…
Solvothermal Vapor Annealing of Lamellar Poly(styrene)-block-poly(d,l-lactide) Block Copolymer Thin Films for Directed Self-Assembly Application
Cummins, Cian; Mokarian-Tabari, Parvaneh; Andreazza, Pascal; Sinturel, Christophe; Morris, Michael A.
Solvothermal vapor annealing (STVA) was employed to induce microphase separation in a lamellar forming block copolymer (BCP) thin film containing a readily degradable block. Directed self-assembly of poly(styrene)-block-poly(d,l-lactide) (PS-b-PLA) BCP films using topographically patterned silicon nitride was demonstrated with alignment over macroscopic areas. Interestingly, we observed lamellar…
Small-Angle Scattering Analysis of Empty or Loaded Hierarchical Porous Materials
Gommes, Cedric J.; Prieto, Gonzalo; de Jongh, Petra E.
Small-angle scattering of X-rays (SAXS) or neutrons (SANS) is one of the few experimental methods that can in principle be used for the in situ study at the mesoscopic scale of physicochemical phenomena occurring inside nanoporous solids. However, the potential of the method is often limited by the lack of…