Syntheses of Silica/Polystyrene-block-Poly(ethylene oxide) Films with Regular and Reverse Mesostructures of Large Characteristic Length Scales by Solvent Evaporation-Induced Self-Assembly

Langmuir ◽  
2001 ◽  
Vol 17 (26) ◽  
pp. 7961-7965 ◽  
Author(s):  
Kui Yu ◽  
Alan J. Hurd ◽  
Adi Eisenberg ◽  
C. Jeffrey Brinker
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Characteristic Length ◽  
Oxide Films ◽  
Solvent Evaporation ◽  
Length Scales ◽  
Evaporation Induced Self Assembly ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solvent-tuning of ordered mesoporous silicas prepared through evaporation-induced self-assembly templated by poly(ethylene oxide-b-ε-caprolactone)

RSC Advances ◽  
2014 ◽  
Vol 4 (105) ◽  
pp. 61012-61021 ◽  
Author(s):  
Wei-Cheng Chu ◽  
Chen-Xin Lin ◽  
Shiao-Wei Kuo
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Mesoporous Silicas ◽  
Size Distributions ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Evaporation Induced Self Assembly ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Selection Of

Highly ordered mesoporous silicas having narrow pore size distributions and various morphologies merely through selection of an appropriate solvent.

Photodegradation Activity of Poly(ethylene oxide-b-ε-caprolactone)-Templated Mesoporous TiO2 Coated with Au and Pt

2020 ◽  
Vol 20 (8) ◽  
pp. 5276-5281 ◽  
Author(s):  
Wei-Cheng Chu ◽  
Jeonghun Kim ◽  
Minjun Kim ◽  
Abdulmohsen Ali Alshehri ◽  
Yousef Gamaan Alghamidi ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Charge Carriers ◽  
Nanocomposite Films ◽  
Soft Template ◽  
X Ray Scattering ◽  
Evaporation Induced Self Assembly ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Mesoporous TiO2 films are synthesized through evaporation-induced self-assembly using poly(ethylene oxide-b-ε-caprolactone) diblock copolymers as a soft-template. Using small-angle X-ray scattering and scanning electron microscopy, we investigate the effect of the TiO2/PEO-b-PCL ratio on the resulting nanoarchitectonic structure. After sputter-coating Au and Pt layers, these Au/TiO2 and Pt/TiO2 nanocomposite films display drastically enhanced photodegradation of rhodamine 6G under ultraviolet irradiation, due to the metal films inhibiting the rapid recombination of photogenerated charge carriers.

Formation Mechanism of Silica/Diblock Mesophases by Solvent Evaporation-Induced Self-Assembly

2001 ◽  
Vol 672 ◽  
Author(s):  
Kui Yu ◽  
Celeste A. Drewien ◽  
Alan J. Hurd ◽  
C. Jeffrey Brinker ◽  
Adi Eisenberg
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Sol Gel ◽  
Homogeneous Solution ◽  
Solvent Evaporation ◽  
Present System ◽  
System A ◽  
Evaporation Induced Self Assembly ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

ABSTRACTIntermediate structures were trapped during the mesophase transition from lamellae to higher curvature structures in a sol-gel matrix. The target structures included normal hexagonally arranged cylinders and/or normal spheres in a cubic array distributed in a hydrophilic matrix. The present system is believed to be the first to trap these intermediates. Through solvent evaporation-induced self-assembly (EISA), mesostructured silica/diblock films with large characteristic length scales were prepared. The structure-directing agents were polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymers with high molecular weight, which are water insoluble and alcohol insoluble. We believe that no micellization took place in the present system; a disorder-to-order transition occurred due to the cooperative self- assembly of the diblock and silicates as the solvent preferentially evaporated from a film cast from a dilute homogeneous solution. During further preferential evaporation, the morphogenic effect of the increase of species concentration facilitates the mesophase development in the direction of a normal cubic to hexagonal to lamellar pathway. However, the morphogenic effects of both the decrease of the PS coil dimension and the siloxane condensation drive the mesophase development in opposite directions. The decrease of the PS coil dimension plays an important role in the present self-assembly process. Trapping of the intermediates and coexisting multiple mesophases are related to the facts that PS has high Tg and high hydrophobicity in particular, as well as to the fact that polymers have relatively low mobility in general.

Symmetric Poly(ethylene oxide-b-styrene-b-isoprene) Triblock Copolymers: Synthesis, Characterization, and Self-Assembly in Bulk and Thin Film

2014 ◽  
Vol 47 (18) ◽  
pp. 6373-6381 ◽  
Author(s):  
Yali Qiao ◽  
Rachel Ferebee ◽  
Bongjoon Lee ◽  
Indranil Mitra ◽  
Nathaniel A. Lynd ◽  
...  
Keyword(s):  
Thin Film ◽  
Ethylene Oxide ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solution self-assembly of poly(ethylene oxide)-block-poly(furfuryl glycidyl ether)-block-poly(allyl glycidyl ether) based triblock terpolymers: a field-flow fractionation study

2014 ◽  
Vol 5 (24) ◽  
pp. 6943-6956 ◽  
Author(s):  
Michael Wagner ◽  
Markus J. Barthel ◽  
Robert R. A. Freund ◽  
Stephanie Hoeppener ◽  
Anja Traeger ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Glycidyl Ether ◽  
Field Flow Fractionation ◽  
Allyl Glycidyl Ether ◽  
Poly Ethylene Oxide ◽  
Flow Fractionation ◽  
Poly Ethylene ◽  
Triblock Terpolymers

scholarly journals Degradation of Poly(Ethylene Oxide) Films Using Crystal Violet

2018 ◽  
Vol 20 (suppl 2) ◽  
pp. 869-872 ◽  
Author(s):  
Thalena Lima da Silva ◽  
Francisca Pereira de Araujo ◽  
Edson Cavalcanti da Silva Filho ◽  
Marcelo Barbosa Furtini ◽  
Josy Anteveli Osajima
Keyword(s):  
Ethylene Oxide ◽  
Crystal Violet ◽  
Oxide Films ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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