An unsymmetric monolayer vesicle membrane

Fuhrhop, Jürgen‐Hinrich; Mathieu, Joachim

doi:10.1039/c39830000144

Cited by 32 publications

(27 citation statements)

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“…3a). As an independent experiment, the metachromatic effect of methylene blue was used as a sensitive probe for the symmetry or asymmetry of MLMs112728. As no blue shift of the absorption band was detected (data given in Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Bolaform surfactants with polyoxometalate head groups and their assembly into ultra-small monolayer membrane vesicles

2012

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Surfactants are indispensable in established technologies as detergents or emulsification agents, and also in recent studies for controlling the growth of nanoparticles or for creating nanocarriers. Although the properties of conventional, organic surfactants are thoroughly explored, strong interest persists in surfactants that possess unique features inaccessible for ordinary systems. Here we present dipolar, bolaform surfactants with a head group comprising of 11 tungsten atoms. These novel compounds are characterized by an exceptionally low critical self-organization concentration, which leads to monolayer vesicles with a diameter of only 15 nm, that is, substantially smaller than for any other system. The membrane of the vesicles is impermeable for water-soluble and oil-soluble guests. Control over release kinetics, which can be followed via the quantitative fluorescence quenching of confined fluorophores, is gained by means of pH adjustments.

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Section: Resultsmentioning

confidence: 99%

Bolaform surfactants with polyoxometalate head groups and their assembly into ultra-small monolayer membrane vesicles

2012

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“…This usually cannot be achieved in simple conventional surfactant systems. So far, various self-assembled structures, including nanofibers [15][16][17][18], nanotubes [19][20][21], ribbons [22], cylinders [23], disks [24], vesicles [25][26][27], as well as hydrogels [28][29][30] and liquid crystals [31][32][33], have been fabricated in bola systems. In addition, bolaamphiphiles were also used in template synthesis [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Recent advances in the mixed systems of bolaamphiphiles and oppositely charged conventional surfactants

Yan

Huang

2009

Journal of Colloid and Interface Science

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“…8,9 When the bending energy of the monolayer is sufficiently large, one may imagine a monolayer vesicle, stabilized by the single curvature, which prefers a particular radius and disfavors others. 10 Such an exotic morphology can be considered an interesting class of Janus nanocapsules, where the inner and the outer surfaces are composed of different blocks. However, monolayer vesicles are rarely observed because the enthalpic penalty generated by unfavorable contact of the solvophobic block and solvent destabilizes the system.…”

Section: ■ Introductionmentioning

confidence: 99%

Self-Assembly of Monolayer Vesicles via Backbone-Shiftable Synthesis of Janus Core–Shell Bottlebrush Polymer

Nam

Kim

et al. 2019

Macromolecules

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We report the self-assembly of monolayer vesicles from Janus core–shell bottlebrush polymers. A route was developed to synthesize doubly grafted bottlebrush copolymers (DGBCPs) possessing A-b-B and B′-b-C side chains on a single repeating unit. Graft-through ring-opening metathesis polymerization of a norbornene moiety installed by single unit monomer insertion allowed us to place the backbone on any repeating unit of the core (B and B′) block. By decorating each core chain end with different chains via reversible addition–fragmentation chain transfer polymerization, we can obtain nanoobjects with an asymmetric B core and a phase-separated A/C shell. We demonstrate that polystyrene-branch-polystyrene′ and polylactide-b-polystyrene-branch-polystyrene′-b-poly(n-butyl acrylate) macromonomers can be successfully synthesized and polymerized to produce DGBCPs in high yields (81–94% conversion) with an absolute molar mass of 149–395 kg mol–1 and a dispersity of 1.18–1.38. In a solvent slightly more selective to A than C, self-assembly of monolayer vesicles with diameter of <100 nm was observed by transmission electron microscopy. Dissipative particle dynamics simulations suggest that increasing the backbone length and moving the backbone toward the B′/C interface increases the backbone bending energy and favors a lower curvature. The spontaneous curvature appears to prefer a particular layer radius, avoiding bilayer formation.

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An unsymmetric monolayer vesicle membrane

Cited by 32 publications

References 0 publications

Bolaform surfactants with polyoxometalate head groups and their assembly into ultra-small monolayer membrane vesicles

Bolaform surfactants with polyoxometalate head groups and their assembly into ultra-small monolayer membrane vesicles

Recent advances in the mixed systems of bolaamphiphiles and oppositely charged conventional surfactants

Self-Assembly of Monolayer Vesicles via Backbone-Shiftable Synthesis of Janus Core–Shell Bottlebrush Polymer

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