Disordered Network State in Hydrated Block-Copolymer Surfactants

Jain, Sumeet; Gong, Xiaobo; Scriven, L. E.; Bates, Frank S.

doi:10.1103/physrevlett.96.138304

Cited by 45 publications

(70 citation statements)

References 20 publications

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“…Previous studies of cylindrical block copolymer micelles do report the existence of a hexagonal phase occurring at high concentrations, [24][25][26][27][28] however in all cases where the order is discussed, this appears to be a regular, translationally well-ordered phase. Another possible phase for systems of concentrated semi-flexible rods is the hexatic, which exhibits long-range sixfold orientational order but only short range translational order.…”

Section: Introductionmentioning

confidence: 97%

An investigation into the hexagonal phases formed in high-concentration dispersions of well-defined cylindrical block copolymer micelles

et al. 2016

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This paper presents a detailed analysis of the structure of the hexagonal phase of poly(ferrocenylsilane) (PFS)-based cylindrical micelles found at concentrations above ca. 5 wt. % in non-polar solvents such as decane. Small angle X-ray scattering indicated that the hexagonal order is not long-range. In all samples, deviations in the lower order peak positions were observed with respect to those expected for a perfect hexagonal lattice, with the degree of deviation correlating with the micelle length. Furthermore, analysis of the peak shapes and peak widths suggest that the phase possesses intermediate translational order similar to the hexatic phase. The observed features can be reproduced by amending Hosemann's paracrystal theory to include a distribution of lattice parameters to model well and poorly condensed regions. It is proposed that this distribution arises due to the bending and intertwining of individual micelles in a hexagonal lattice resulting in a kinetically-trapped phase that is initially neither perfectly hexagonal nor canonically hexatic but which anneals over time towards a perfect hexagonal lattice.

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Section: Introductionmentioning

confidence: 97%

An investigation into the hexagonal phases formed in high-concentration dispersions of well-defined cylindrical block copolymer micelles

et al. 2016

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“…However, entropic demands and molecular frustration induces the formation of defects such as end caps (which are more energetically favourable) and branch points (which are less favourable). [13] Literature reports of giant [14] and short worms, [15,16] y-junction and end cap defects, [17,18] and even worm-like micellar networks [19] illustrate the increasing complexity associated with macromolecular amphiphilic self-assemblies. The wide array of intramolecular and intermolecular interactions within block copolymer assemblies generates even more sophisticated structures.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembled Block Copolymer Aggregates: From Micelles to Vesicles and their Biological Applications

Blanazs

Armes

Ryan

2009

Macromol. Rapid Commun.

1,395

1,370

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The ability of amphiphilic block copolymers to self‐assemble in selective solvents has been widely studied in academia and utilized for various commercial products. The self‐assembled polymer vesicle is at the forefront of this nanotechnological revolution with seemingly endless possible uses, ranging from biomedical to nanometer‐scale enzymatic reactors. This review is focused on the inherent advantages in using polymer vesicles over their small molecule lipid counterparts and the potential applications in biology for both drug delivery and synthetic cellular reactors.magnified image

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“…However, the entropic demands and molecular frustration induces the formation of defects such as end caps and branch points [28,54]. Literature reports of giant [52] and short worms [17,55], y-junction and end cap defects [56][57][58][59][60][61], and even worm-like micellar networks [57,58] illustrate the complexity of block copolymer assemblies. The cylindrical shape is particularly interesting in part because of its potential applications in nanotechnology and medicine.…”

Section: Cylindrical Micellesmentioning

confidence: 96%

Dynamic Assembly of Block-Copolymers

Quémener¹,

Deratani²,

Lecommandoux³

2011

Constitutional Dynamic Chemistry

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Block copolymers (BCs) are well-known building blocks for the creation of a large variety of nanostructured materials or objects through a dynamic assembly stage which can be either autonomous or guided by an external force. Today's nanotechnologies require sharp control of the overall architecture from the nanoscale to the macroscale. BCs enable this dynamic assembly through all the scales, from few aggregated polymer chains to large bulk polymer materials. Since the discovery of controlled methods to polymerize monomers with different functionalities, a broad diversity of BCs exists, giving rise to many different nanoobjects and nanostructured materials. This chapter will explore the potentialities of block copolymer chains to be assembled through dynamic interactions either in solution or in bulk.

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Disordered Network State in Hydrated Block-Copolymer Surfactants

Cited by 45 publications

References 20 publications

An investigation into the hexagonal phases formed in high-concentration dispersions of well-defined cylindrical block copolymer micelles

An investigation into the hexagonal phases formed in high-concentration dispersions of well-defined cylindrical block copolymer micelles

Self‐Assembled Block Copolymer Aggregates: From Micelles to Vesicles and their Biological Applications

Dynamic Assembly of Block-Copolymers

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