Influence of the block sequence on the morphological behavior of ABC triblock copolymers

Hückstädt, Hanno; Göpfert, Astrid; Abetz, Volker

doi:10.1016/s0032-3861(00)00290-1

Cited by 104 publications

(82 citation statements)

References 19 publications

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“…5A), we hypothesize that the cell plasma membrane and the SER membrane interact to form a pair of parallel lipid-bilayer membranes, separated by the cellular cytoplasm. The two parallel lipid-bilayer membranes of the developing scale cell form a pentacontinuous structure with a core-shell double gyroid morphology, similar to those seen in ABC triblock copolymer melts (40,41) (Fig. 5 A and B).…”

Section: Resultsmentioning

confidence: 61%

Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales

Saranathan

Osuji

Mochrie

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

454

412

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Complex three-dimensional biophotonic nanostructures produce the vivid structural colors of many butterfly wing scales, but their exact nanoscale organization is uncertain. We used small angle X-ray scattering (SAXS) on single scales to characterize the 3D photonic nanostructures of five butterfly species from two families (Papilionidae, Lycaenidae). We identify these chitin and air nanostructures as single network gyroid (I4 1 32) photonic crystals. We describe their optical function from SAXS data and photonic band-gap modeling. Butterflies apparently grow these gyroid nanostructures by exploiting the self-organizing physical dynamics of biological lipid-bilayer membranes. These butterfly photonic nanostructures initially develop within scale cells as a core-shell double gyroid (Ia3d), as seen in block-copolymer systems, with a pentacontinuous volume comprised of extracellular space, cell plasma membrane, cellular cytoplasm, smooth endoplasmic reticulum (SER) membrane, and intra-SER lumen. This double gyroid nanostructure is subsequently transformed into a single gyroid network through the deposition of chitin in the extracellular space and the degeneration of the rest of the cell. The butterflies develop the thermodynamically favored double gyroid precursors as a route to the optically more efficient single gyroid nanostructures. Current approaches to photonic crystal engineering also aim to produce single gyroid motifs. The biologically derived photonic nanostructures characterized here may offer a convenient template for producing optical devices based on biomimicry or direct dielectric infiltration.biological meta-materials | organismal color | biomimetics | biological cubic mesophases

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Section: Resultsmentioning

confidence: 61%

Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales

Saranathan

Osuji

Mochrie

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

454

412

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“…1). It was shown before that for this block sequence the length of the V-block does not influence the morphology in a large range of block lengths [65,66], i.e., the added short third block does not induce a non-lamellar morphology, when all components are microphase separated. Dynamic mechanical analysis (DMA), small angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and in situ birefringence were used for characterisation.…”

Section: Introductionmentioning

confidence: 75%

Orientation behaviour of AB and ABC block copolymers under large amplitude oscillatory shear flow in bulk and in concentrated solution

Stangler

Abetz

2002

E-Polymers

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Flow alignment in a large amplitude oscillatory shear field of lamellar AB and ABC block copolymers has been studied in bulk and in solution. Flow birefringence and 2D small-angle X-ray scattering were used to monitor the orientation. Qualitatively similar orientation behaviour was found for the diluted and the bulk AB block copolymer. While in AB diblock copolymers there is only one interface between the different blocks which may influence the orientation behaviour, in ABC triblock copolymers there are two interfaces within the macromolecule. It will be shown that the introduction of a third block leads to a quite different orientation behaviour in comparison to the AB system. In the lamellar diluted ABC system always the parallel orientation dominates, but it occurs in coexistence with the perpendicular and transverse orientations.

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“…. .. [12] The diblock copolymers SVand VC are both symmetrically composed and therefore self-assemble into lamellar structures. [13] Blends of Lamellar ABC with Lamellar BC or DC Block Copolymers…”

Section: Resultsmentioning

confidence: 99%

“…The details of the synthesis have been described elsewhere. [12,13] Table 1 gives the characteristics of the block copolymers used in this study.…”

Section: Experimental Partmentioning

confidence: 99%

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

Jiang

Göpfert

Abetz

2003

Macromol. Rapid Commun.

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The formation of superlattices in blends of a series of asymmetric BSV triblock terpolymers and symmetric SV or VC diblock copolymers is investigated with S being polystyrene, B being poly(1,2‐butadiene), V being poly(2‐vinylpyridine), and C being poly(cyclohexyl methacrylate). All of these triblock terpolymers and diblock copolymers by themselves self‐assemble into lamellae. Apart from various core shell morphologies, in these blends some new unexpected superstructures were obtained.A TEM micrograph of a 50/50 blend of B30S58V with S45V.magnified imageA TEM micrograph of a 50/50 blend of B30S58V with S45V.

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Influence of the block sequence on the morphological behavior of ABC triblock copolymers

Cited by 104 publications

References 19 publications

Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales

Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales

Orientation behaviour of AB and ABC block copolymers under large amplitude oscillatory shear flow in bulk and in concentrated solution

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

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Influence of the block sequence on the morphological behavior of ABC triblock copolymers

Cited by 104 publications

References 19 publications

Structure, function, and self-assembly of single network gyroid ( I 4 1 32) photonic crystals in butterfly wing scales

Structure, function, and self-assembly of single network gyroid ( I 4 1 32) photonic crystals in butterfly wing scales

Orientation behaviour of AB and ABC block copolymers under large amplitude oscillatory shear flow in bulk and in concentrated solution

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

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Product

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Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales

Structure, function, and self-assembly of single network gyroid ( I 4 ₁ 32) photonic crystals in butterfly wing scales