Results 251 to 260 of about 110,652 (300)

Prismatic Block Copolymer Hexosomes

ACS Nano, 2023
Cubosomes and hexosomes are recent solution morphologies with an ordered porous structure and are observed for lipids and amphiphilic block copolymers (BCPs) with high hydrophobic fractions. Whereas lipid hexosomes typically exhibit a prismatic shape, BCP hexosomes have so far only been observed as closed microspheres where inner channels are not ...
André H. Gröschel, Tina Gröschel, Suna Azhdari, Marcel Schumacher, Hui Chen   +4 more
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Block Copolymers

2014
Phase separation of block copolymers, also known as directed self-assembly has potential application for increasing the resolution of existing lithographic tools to increase the density of patterns and interconnects in integrated circuits.
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Cyclic Block Copolymers for Controlling Feature Sizes in Block Copolymer Lithography

ACS Nano, 2012
Block copolymer lithography holds promise as a next-generation technique to achieve the sub-20 nm feature sizes demanded by semiconductor roadmaps. While molecular weight and block immiscibility have traditionally been used to control feature size, this study demonstrates that macromolecular architecture is also a powerful tool for tuning domain ...
J. E. Poelma, K. Ono, D. Miyajima, T. Aida, K. Satoh, C. J. Hawker   +5 more
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Self-assembly of block copolymers

Chemical Society Reviews, 2012
Block copolymer (BCP) self-assembly has attracted considerable attention for many decades because it can yield ordered structures in a wide range of morphologies, including spheres, cylinders, bicontinuous structures, lamellae, vesicles, and many other complex or hierarchical assemblies.
Yiyong, Mai, Adi, Eisenberg
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Morphology of block copolymers and mixtures of block copolymers at free surfaces

Polymer, 1992
Abstract The microdomain morphology of block copolymers at the free surfaces of solution-cast films was investigated by means of transmission electron microscopy and ultramicrotomy. The free surfaces of block copolymers consisting of amorphous components obey the thermodynamic requirements, i.e.
Hirokazu Hasegawa, Takeji Hashimoto
openaire   +1 more source

Bioinspired functional block copolymers

Soft Matter, 2007
The diversity and complexity of structures and functions in synthetic polymer systems can be increased through conjugation with biological segments or, in other words, through generation of "polymer-bioconjugates" or "macromolecular chimeras". The present contribution highlights major synthetic approaches toward sophisticated functional hybrid block ...
Börner, H., Schlaad, H.
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Theory of block copolymers. I. Domain formation in A‐B block copolymers

Journal of Polymer Science Part C: Polymer Symposia, 1969
AbstractMicrophase separation occurs in many block copolymers to give domain structures. In this first paper in a series dealing with domain formation and the consequences thereof, a theory is presented for the formation of spherical domains in A‐B block copolymers. The theory establishes criteria for the formation of domains and their size in terms of
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Block copolymers and liquid crystalline block copolymers: A bird's‐eye view

Macromolecular Symposia, 1997
AbstractBlock copolymers and liquid crystals are separately known to order at different length scales. Various types of molecular interactions in liquid crystalline block copolymers determine complex phase behaviors and states of order, and thereby can provide a way of tailoring the material properties.
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Chemoenzymatic Synthesis of Block Copolymers

2008
The chemoenzymatic cascade synthesis of block copolymers combining enzymatic ring opening polymerization (eROP) and atom transfer radical polymerization (ATRP) is reviewed. Factors like reaction condition and initiator structure were investigated and optimized prior to the polymerization.
Geus, de, M., Palmans, A.R.A., Duxbury, C.J., Villarroya, S., Howdle, S.M., Heise, A.   +5 more
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Chain Segregation in Block Copolymers

1989
The mixing of two different homopolymers leads in most cases to a two-phase blend. The main reason for this behaviour is that the combinatorial entropy of mixing is very small for chain molecules and specific interactions are required to achieve miscibility.1 Such two-phase blends are generally characterized by opacity, distinct thermal transitions for
Yuan, X-F, Brown, R.A., Masters, A.J., Price, C.   +3 more
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