High-genus multicompartment vesicles evolved from large compound micelles

2021 ◽  
Author(s):  
Sha Lin ◽  
Fangyingkai Wang ◽  
Jianzhong Du
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ethylene Oxide ◽  
Fluorescence Spectroscopy ◽  
Formation Process ◽  
High Genus ◽  
Transmission Electron ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Large Compound

We report a high-genus multicompartment vesicle (HGMV) that is self-assembled from poly(ethylene oxide)-block-poly[4-azophenyl-(2-carbamoyloxymethyl)ethyl methacrylate] (PEO43-b-PACEMA10). The formation process of these HGMVs was investigated by transmission electron microscopy (TEM), fluorescence spectroscopy,...

scholarly journals pH-Dependence of the morphology of micelles formed by poly(2-vinylpyridine)-block-poly(ethylene oxide) copolymers in water

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Jean-François Gohy ◽  
Sandrine Mores ◽  
Sunil K. Varshney ◽  
Jian-Xin Zhang ◽  
Robert Jérôme
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ethylene Oxide ◽  
Ph Dependence ◽  
Minor Component ◽  
Transmission Electron ◽  
Poly Ethylene Oxide ◽  
Spherical Micelles ◽  
Poly Ethylene ◽  
Ph Range

AbstractThe morphology of micelles formed by two poly(2-vinylpyridine)-blockpoly( ethylene oxide) (P2VP-b-PEO) copolymers has been studied in phosphatebuffered water by dynamic light scattering and transmission electron microscopy. Spherical micelles are observed when the P2VP block is the minor component of the diblock copolymer. When P2VP dominates the composition, transition from spheres-to-rods-to-vesicles takes place in a narrow pH range that straddles the pKa of P2VP. This transition is controlled by the degree of protonation of the P2VP blocks. At high pH, the copolymer precipitates from the solution.

Effect of ZnO Nanoparticles on the Structure and Ionic Relaxation of Poly(ethylene oxide)-LiI Polymer Electrolyte Nanocomposites

2008 ◽  
Vol 8 (4) ◽  
pp. 1922-1926 ◽  
Author(s):  
S. Bhattacharya ◽  
A. Ghosh
Keyword(s):  
Electron Microscopy ◽  
Ethylene Oxide ◽  
Polymer Electrolyte ◽  
Zno Nanoparticles ◽  
Structural Modification ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Poly Ethylene Oxide ◽  
Nanocomposite Electrolyte ◽  
Poly Ethylene

The effect of ZnO nanoparticles on the structure and ionic relaxation of LiI salt doped poly(ethylene oxide) (PEO) polymer electrolytes has been investigated. X-ray diffraction, high resolution transmission electron microscopy and field emission scanning electron microscopy show that ZnO nanoparticles dispersed in the PEO-LiI polymer electrolyte reduce the crystallinity of PEO and increase relative smoothness of the surface morphology of the nanocomposite electrolyte. The electrical conductivity of the nanocomposites is found to increase due to incorporation of ZnO nanoparticles. We have shown that the structural modification due to insertion of ZnO nanoparticles results in the enhancement of the mobility i.e., the hopping rate of mobile Li+ ions and hence the ionic conductivity of PEO-LiI-ZnO nanocomposite electrolyte.

scholarly journals Control of Inter-fiber Fusing for Nanofiber Webs via Electrospinning

2011 ◽  
Vol 6 (4) ◽  
pp. 155892501100600 ◽  
Author(s):  
Bharath K. Raghavan ◽  
Douglas W. Coffin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Controlled Environment ◽  
Surrounding Environment ◽  
Transmission Electron ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Viable Method ◽  
Scanning Electron

Electrospinning provides a viable method to produce both single fibers and mats of nonwoven fibers. For a nonwoven mat, fusing of the fibers at intersections produces an integrated structure. The ability to spin fibrous mats of nanofibers with and without fusing between the fibers is demonstrated using poly(ethylene oxide) (PEO) fibers. The fusing was controlled by adjusting the amount of water vapor in the surrounding environment. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) images were used to evaluate the percent of fused fibers in the mat and the diameters of fibers. The major finding of this work is that fusing of fibers can be controlled during formation of a nanofibrous mat via electrospinning in a controlled environment.

scholarly journals Study Structure and Properties of Nanocomposite Material Based on Unsaturated Polyester with Clay Modified by Poly(ethylene oxide)

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Tran Duy Thanh ◽  
Nguyen Dang Mao ◽  
Nguyen Thi Kim Ngan ◽  
Ha Thuc Chi Nhan ◽  
Ha Thuc Huy ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Polymer Matrix ◽  
Unsaturated Polyester ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Poly Ethylene Oxide ◽  
Hydrophobic Nature ◽  
Poly Ethylene ◽  
Alkyl Ammonium

In recent years, polymer clay nanocomposites have been attracting considerable interests in polymers science because of their advantages. There are many scientists who researched about this kind of material and demonstrated that when polymer matrix was added to little weight of clay, properties were enhanced considerably. Because clay is a hydrophilic substance so it is difficult to use as filler in polymer matrix having hydrophobic nature, so clay needs to be modified to become compatible with polymer. In this study, poly(ethylene oxide) was used as a new modifier for clay to replace some traditional ionic surfactants such as primary, secondary, tertiary, and quaternary alkyl ammonium or alkylphosphonium cations having the following disadvantages: disintegrate at high temperature, catalyze polymer degradation, and make nanoproducts colorific, and so forth. In order to evaluate modifying effect of poly(ethylene oxide), modified clay products were characterize d by X-ray spectrum. Then organoclay was used to prepare nanocomposite based on unsaturated polyester. Morphology and properties of nanocomposites were measure d by X-ray diffraction, transmission electron microscopy, tensile strength, and thermal stability. The results showed that clay galleries changed to intercalated state in the nanocomposites. Properties of nanocomposites were improved a lot when the loading of the organoclay was used at 1 phr.

SYNTHESIS OF TUBULAR Ge NANOSTRUCTURES

2010 ◽  
Vol 09 (01n02) ◽  
pp. 75-81
Author(s):  
L. Z. PEI ◽  
H. S. ZHAO ◽  
H. Y. YU ◽  
J. L. HU
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Pore Size ◽  
Formation Process ◽  
Room Temperature ◽  
Hydrothermal Process ◽  
Rolling Mechanism ◽  
Transmission Electron ◽  
Inner Pore

Hollow germanium tubular nanostructures have been obtained by a hydrothermal process at a temperature of 400°C and pressure of 7 MPa with quick cooling to room temperature. Transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) show that the germanium tubular nanostructures are polycrystalline and have open-end structures at the tips. The diameter of germanium tubular nanostructures is about 40–70 nm and the inner pore size is about 10 nm in average. We propose the rolling mechanism for the formation of tubular nanostructures from lamellar nanostructures to explain the possible formation process of germanium tubular nanostructures.

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