Synthesis and electrochemical properties of mesostructured 12-phosphotungstic acid thin films with hierarchical structures by triblock copolymer templating

2003 ◽  
Vol 788 ◽  
Author(s):  
Hui-suk Yun ◽  
Makoto Kuwabara ◽  
Haoshen Zhou ◽  
Itaru Honma
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Electrochemical Properties ◽  
Triblock Copolymer ◽  
Phosphotungstic Acid ◽  
Specific Capacity ◽  
Hierarchical Structures ◽  
Keggin Anion ◽  
Monoclinic Crystal ◽  
Organic Part

ABSTRACTHexagonally mesostructured 12-phosphotungstic acid (PWA) thin films with both large pore size and hierarchical structures have been successfully prepared by using triblock copolymer templates for the first time. The films is composed by three kind of structures; PWA Keggin anion, monoclinic crystal structure consisting of PWA Keggin anion and organic part (hydrophilic component) of block copolymers, and the hexagonal mesostructure of self-arrayed PWA and block copolymers. The calcined PWA films show better electrochemical properties such as a faster faradic processes and larger specific capacity than normal P WA clusters.

Morphological transformations in solution-cast Styrene-Butadiene-Styrene (SBS) triblock copolymer thin films

1995 ◽  
Vol 53 ◽  
pp. 184-185
Author(s):  
Ginam Kim ◽  
W. Marsillo ◽  
M. Libera
Keyword(s):  
Thin Films ◽  
Triblock Copolymer ◽  
Annealing Treatment ◽  
Minor Component ◽  
Solvent Evaporation ◽  
Single Crystal Substrate ◽  
Transparent Films ◽  
Crystal Substrate ◽  
Solution Cast ◽  
Morphological Transformations

The fact that block copolymers can assume a range of morphologies depending upon such variables as relative block length and molecular weight is now well known. In the case of poly(styrene)[PS]-poly(butadiene)[PB]-poly(styrene) (SBS) triblock copolymer, the morphologies range from spheres (roughly ~20% minor component), to cylinders (roughly 20%~35% minor component), to lamellae (roughly equal component fractions) Most recently, there has been increasing interest in transformations between morphologies by thermal annealing. This paper describes initial results studying the effect of solvent evaporation rate and post-casting annealing treatment on the morphology of SBS thin films.TEM specimens were prepared by solution casting electron transparent films. 50 μl of 0.1 wt% SBS (30% styrene, Mw=14,000, Scientific Polymer Products, Inc.) dissolved in toluene was deposited on a polished NaCl single crystal substrate placed in a small dish. After solvent evaporation the film was cut into small squares, floated from the salt in water, and each square was collected on a Cu grid.

Electrochemical properties of thin films of V 2 O 5 doped with TiO 2

2018 ◽  
Vol 119 ◽  
pp. 1-8 ◽  
Author(s):  
E.A. Moura ◽  
C.M. Cholant ◽  
R.D.C. Balboni ◽  
T.M. Westphal ◽  
R.M.J. Lemos ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrochemical Properties

scholarly journals The combination of block copolymers and phospholipids to form giant hybrid unilamellar vesicles (GHUVs) does not systematically lead to “intermediate” membrane properties

Soft Matter ◽  
2018 ◽  
Vol 14 (31) ◽  
pp. 6476-6484 ◽  
Author(s):  
T. P. T. Dao ◽  
F. Fernandes ◽  
M. Fauquignon ◽  
E. Ibarboure ◽  
M. Prieto ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Triblock Copolymer ◽  
Membrane Properties ◽  
Unilamellar Vesicles

The combination of a triblock copolymer and phospholipids to form GHUVs leads to an unexpected decrease of vesicle toughness.

scholarly journals Role of dissimilar interfaces in thin films of cylinder-forming block copolymers

2004 ◽  
Vol 120 (2) ◽  
pp. 1127-1137 ◽  
Author(s):  
K. S. Lyakhova ◽  
G. J. A. Sevink ◽  
A. V. Zvelindovsky ◽  
A. Horvat ◽  
R. Magerle
Keyword(s):  
Thin Films ◽  
Block Copolymers
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