Shear-induced sphere-to-cylinder transition in diblock copolymer thin films

Hong, Young Rae; Adamson, Douglas H.; Chaikin, P. M.; Register, Richard A.

doi:10.1039/b820312a

Cited by 52 publications

(62 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results complement the experimental findings 8 by providing details of the time evolution of the structures in large simulation boxes, reaching the sample sizes relevant to the experiments. Our results unveil many nontrivial features, which were not possible to see by other simulation methods.…”

Section: -32supporting

confidence: 69%

“…8 A possible mechanism for the latter phenomenon was suggested in ref. 8 inspired by our earlier simulations for the bulk sphere system. 16 A confirmation of that suggestion was required, together with a complete picture of how such an alignment occurs in time, both in single layer and two layer systems.…”

Section: -11mentioning

confidence: 99%

“…8,[12][13][14][15] Not only can spheres transform to cylinders above a certain shear rate, but one can achieve a perfect alignment of spheres in layers at lower shear rates. 8 Initially, it was suggested that two or more layers are required for such an alignment, 12 while, most recently, a single layer film was successfully aligned by shear. 8 A possible mechanism for the latter phenomenon was suggested in ref.…”

Section: -11mentioning

confidence: 99%

“…8 Initially, it was suggested that two or more layers are required for such an alignment, 12 while, most recently, a single layer film was successfully aligned by shear. 8 A possible mechanism for the latter phenomenon was suggested in ref. 8 inspired by our earlier simulations for the bulk sphere system.…”

Section: -11mentioning

confidence: 99%

“…8 Shearing of spherical bulk phase and shear induced sphere-to-cylinder transition in bulk have a long history.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Diblock copolymer sphere morphology in ultra thin films under shear

et al. 2011

View full text Add to dashboard Cite

We demonstrate that the shear alignment and the shear-induced transitions in sphere-forming diblock copolymer single layer and bilayer films observed experimentally [Y.-R Hong, D. H. Adamson, P. M. R. A. Register, Soft Matter, 2009, 5, 1687] can be explained by cell dynamics simulation, a simple model with a Ginzburg-Landau Hamiltonian. In two layer films the spheres align in various arrangements, like (100) or (110) bcc planes, or transform to cylinders depending on the shear rate and the temperature. For the first time, we present a nontrivial alignment mechanism of a single layer of spherical domains in shear via slug-like movement of transient cylindrical micelles. In addition, we clarify the formation of the perpendicular cylinders, found in the recent particle based simulation [A. Chremos, K. Margaritis, A. Z. Panagiotopoulos, Soft Matter, 2010, 6, 3588].

show abstract

Section: -32supporting

confidence: 69%

Section: -11mentioning

confidence: 99%

Section: -11mentioning

confidence: 99%

Section: -11mentioning

confidence: 99%

“…8 Shearing of spherical bulk phase and shear induced sphere-to-cylinder transition in bulk have a long history.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diblock copolymer sphere morphology in ultra thin films under shear

et al. 2011

View full text Add to dashboard Cite

show abstract

A Comprehensive Approach to the Alignment and Ordering of Block Copolymer Morphologies

Lazzari

Rosa

2009

Advanced Nanomaterials

View full text Add to dashboard Cite

Microphase Separation of Block Copolymer Thin Films

Zhang

Peng

et al. 2010

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Today, high-ordered micro- and nano-patterned surfaces are widely used in many areas, such as in the preparation of super-thin dielectric films, photonic crystals, antireflective films, super-non-wetting surfaces, bio-compatible surfaces and microelectric devices. Considering the critical fabrication conditions and the irreducible high cost of the photolithography technique in patterning nano-scale structures (<100 nm), the development of other micro- and nano-patterning techniques that can be used to fabricate long-range ordered features - especially nanoscale arrays - is a promising subject in surface science. In contrast to the traditional photolithography patterning technique, block copolymers can spontaneously phase separate into arrays of periodic patterns with length-scales of 10-50 nm, which provides an efficient pathway to pattern nanoscale features. Today, preparing long-range ordered arrays by block copolymer microphase separation is one of the most promising techniques for the fabrication of nanoscale arrays, not only being a simple process but also having a lower cost than traditional methods. In this feature article, we first summarize the many techniques developed to induce ordering in the microphase separation of the block copolymer thin films. Then, evolution, order-order transitions and reversible switching microdomains are considered, since they are very important in the ordered engineering of microphase separation of the block copolymer thin films. Finally, the outlook of this research area will be given.

show abstract

Shear-induced sphere-to-cylinder transition in diblock copolymer thin films

Cited by 52 publications

References 23 publications

Diblock copolymer sphere morphology in ultra thin films under shear

Diblock copolymer sphere morphology in ultra thin films under shear

A Comprehensive Approach to the Alignment and Ordering of Block Copolymer Morphologies

Microphase Separation of Block Copolymer Thin Films

Contact Info

Product

Resources

About