Mechanisms of electric-field-induced alignment of block copolymer lamellae

Pinna, Marco; Schreier, Ludwig; Zvelindovsky, Andrei

doi:10.1039/b814969k

Cited by 46 publications

(62 citation statements)

References 29 publications

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“…To this end, we start by considering a lamellae phase corresponding to the parameters used in ref. [28] except for B ¼ 0.0005. Tuning B we can control the natural lamellar domain size, and hence its magnitude with respect to the colloid size.…”

Section: Colloids In Block Copolymer Mesophasesmentioning

confidence: 97%

“…Nonetheless, we believe that the phenomenology we are studying is rather general and, hence, we allow the freedom of choosing the parameters in Equation 4 as phenomenological constants. As we have shown recently [5,28] cell dynamics simulation (CDS) can be used in a tandem with a more elaborate technique like dynamics self-consistent field theory (DSCFT) which involves direct evaluation of the polymer path integrals. DSCFT is very computational expensive and using CDS as a research precursor can save time in problems involving parameter space search.…”

Section: Polymer Evolution: Cell Dynamics Simulationmentioning

confidence: 99%

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Modeling of Block Copolymer/Colloid Hybrid Composite Materials

Pinna

Pagonabarraga

Zvelindovsky

2011

Macro Theory & Simulations

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The interaction between a diblock copolymer and nanoscopic particles can lead to highly organized hybrid materials. The morphology of such hybrid materials depends on the polymer compositions as well on the shapes, sizes, and surface treatment of the particles. A hybrid mesoscopic approach to study the dynamics of nanocomposites composed from a block copolymer melt and a suspension of colloids is proposed. A collective description of the polymer dynamics is combined with the individual resolution of the colloids. The implementation of the method in two and three dimensions is described and the method is tested for different particle sizes, diblock copolymer compositions and polymer/colloid interactions.magnified image

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Section: Colloids In Block Copolymer Mesophasesmentioning

confidence: 97%

Section: Polymer Evolution: Cell Dynamics Simulationmentioning

confidence: 99%

Modeling of Block Copolymer/Colloid Hybrid Composite Materials

Pinna

Pagonabarraga

Zvelindovsky

2011

Macro Theory & Simulations

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“…The focus of most numerical studies have either been on mechanism of alignment of ordered domains [33][34][35][36][37] or on order-order transition from one morphology to the other in bulk samples [38][39][40][41][42]. The effect of substrate interaction and confinement have not been investigated thoroughly which could signifi-cantly alter the phase morphologies and critical electric field for transition.…”

Section: Introductionmentioning

confidence: 99%

Influence of substrate interaction and confinement on electric-field-induced transition in symmetric block-copolymer thin films

Mukherjee

Ankit

et al. 2016

Phys. Rev. E

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In the present work, we study morphologies arising due to competing substrate interaction, electric field and confinement effects on a symmetric diblock copolymer. We employ a coarse grained non-local Cahn-Hilliard phenomenological model taking into account the appropriate contributions of substrate interaction and electrostatic field. The proposed model couples the Ohta-Kawasaki functional with Maxwell equation of electrostatics, thus alleviating the need for any approximate solution used in previous studies. We calculate the phase diagram in electric field-substrate strength space for different film thicknesses. In addition to identifying the presence of parallel, perpendicular and mixed lamellae phases similar to analytical calculations, we also find a region in the phase diagram where hybrid morphologies (combination of two phases) coexist. These hybrid morphologies arise either solely due to substrate affinity and confinement or are induced due to the applied electric field. The dependence of the critical fields for transition between the various phases on substrate strength, film thickness and dielectric contrast is discussed. Some preliminary 3D results are also presented to corroborate the presence of hybrid morphologies.

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“…[25][26] Böker et al have examined the fundamentals for the movements of microstructure in BCP under an electric field.…”

mentioning

confidence: 99%

“…[16][17][18][19][20][21][22][23][24][25][26] Amundson et al have initiated the interesting series of research works. 16 Russell et al have studied the effects of experimental parameters on the BCP microdomain orientation in the electric field.…”

mentioning

confidence: 99%

A Pathway to Microdomain Alignment in Block Copolymer/Nanoparticle Thin Films under Electric Field

Bae¹

2014

Bulletin of the Korean Chemical Society

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The control over microstructure in block copolymer thin films using external electric fields has become an interesting research topic. In this article, the effect of nanoparticle on the microdomain alignments in block copolymer (polystyrene-b-poly(2-vinylpyridine)/nanoparticle (Au) thin films under electric fields has been examined with transmission electron microscopy. The homogeneous dispersion of Au nanoparticles into the block copolymer matrix was achieved by surface modification of nanoparticles with compatible ligands. Compared with the phenomenon seen in the pristine block copolymer thin films, a peculiar alignment behavior was observed in the block copolymer/nanoparticle hybrid thin films under electric fields. In addition, the different pathways observed in the pristine and nanoparticle incorporated block copolymer thin films were also monitored as a function of exposure time. This work can provide the fundamental information for understanding microdomain alignment in block copolymer/nanoparticle thin films under external electric fields.

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Mechanisms of electric-field-induced alignment of block copolymer lamellae

Cited by 46 publications

References 29 publications

Modeling of Block Copolymer/Colloid Hybrid Composite Materials

Modeling of Block Copolymer/Colloid Hybrid Composite Materials

Influence of substrate interaction and confinement on electric-field-induced transition in symmetric block-copolymer thin films

A Pathway to Microdomain Alignment in Block Copolymer/Nanoparticle Thin Films under Electric Field

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