Self-assembly of light-sensitive surfactants

Eastoe, Julian; Vesperinas, Ana

doi:10.1039/b510877m

Cited by 265 publications

(227 citation statements)

References 97 publications

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“…Usually, the solubility of the building blocks will be increased after the azobenzene changes from trans to cis form. [101][102][103] Sakai et al built up a model to control the reversible release of oily substances from the azobenzenecontaining micelles by light irradiation. When the azobenzene moiety in the middle hydrophobic part of the surfactant changed from trans to cis form, the micelle was destroyed and the small hydrophobic molecules preloaded in the micelle could be released under control.…”

Section: Photocontrolled Methodsmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

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Amphiphilicity is one of the molecular bases for self‐assembly. By tuning the amphiphilicity of building blocks, controllable self‐assembly can be realized. This article reviews different routes for tuning amphiphilicity and discusses different possibilities for self‐assembly and disassembly in a controlled manner. In general, this includes irreversible and reversible routes. The irreversible routes concern irreversible reactions taking place on the building blocks and changing their molecular amphiphilicity. The building blocks are then able to self‐assemble to form different supramolecular structures, but cannot remain stable upon loss of amphiphilicity. Compared to the irreversible routes, the reversible routes are more attractive due to the good control over the assembly and disassembly of the supramolecular structure formed via tuning of the amphiphilicity. These routes involve reversible chemical reactions and supramolecular approaches, and different external stimuli can be used to trigger reversible changes of amphiphilicity, including light, redox, pH, and enzymes. It is anticipated that this line of research can lead to the fabrication of new functional supramolecular assemblies and materials.

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Section: Photocontrolled Methodsmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

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“…The general concept is most interesting, as it suggests that one would be able to drive reversible adsorption-desorption phenomena, and stability-instability transitions in emulsions, for example. A recent review 41 presents some of the recent developments and challenges in this field. Some of the most detailed experimental work to date on these systems can be traced to the Hatton group 42 which studied non-ionic photosensitive surfactants consisting of a polar di(ethylene oxide) head group attached to an alkyl spacer of between two and eight methylene groups, coupled through an ether linkage to an azobenzene moiety.…”

Section: Molecular Model Of Photo-sensitive Surfactantsmentioning

confidence: 99%

Modelling the interfacial behaviour of dilute light-switching surfactant solutions

Herdes

Santiso

James

et al. 2015

Journal of Colloid and Interface Science

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The direct molecular modelling of an aqueous surfactant system at concentrations below the critical micelle concentration (pre-cmc) conditions is unviable in terms of the presently available computational power. Here, we present an alternative that combines experimental information with tractable simulations to interrogate the surface tension changes with composition and the structural behaviour of surfactants at the water-air interface. The methodology is based on the expression of the surface tension as a function of the surfactant surface excess, both in the experiments and in the simulations, allowing direct comparisons to be made. As a proof-of-concept a coarse-grained model of a light switching non-ionic surfactant bearing a photosensitive azobenzene group is considered at the air-

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“…Tuning the foamability (but not the foam stability) has been achieved by the temperature or UV irradiation [22] . If some results start to be collected on responsive self assemblies made of surfactants or gels (with reversible effects) [23] , almost nothing has been found yet with foams. Here, we report results on a simple and sustainable system which gathers a good foamability and an outstanding foam stability which can then be readily tuned to weak foam stability by changing the polymorphism of the system upon heating.…”

Section: ((Dedication----optional))mentioning

confidence: 99%

Smart Foams: Switching Reversibly between Ultrastable and Unstable Foams

Fameau¹,

Saint‐Jalmes

Cousin³

et al. 2011

Angewandte Chemie

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Ultrastabile Schäume mit optimaler Schäumbarkeit sind mithilfe von Hydroxyfettsäure‐Röhren zugänglich (siehe Bild). Die Stabilisierung ist die Folge der Adsorption von Monomeren an der Luft‐Wasser‐Grenzfläche und dem Vorliegen von Röhren in den Plateau‐Grenzen. Beim Erwärmen gehen die Röhren in Micellen über, was zur Schaumdestabilisierung und damit zu den ersten Schäumen mit temperaturgesteuerter Schäumbarkeit führt.

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Self-assembly of light-sensitive surfactants

Abstract: This review covers recent advances with an intriguing class of functionalised light-sensitive surfactants. The main chemical classes are described, and the photo-responses in interfacial and aggregation systems are discussed.

Cited by 265 publications

References 97 publications

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Modelling the interfacial behaviour of dilute light-switching surfactant solutions

Smart Foams: Switching Reversibly between Ultrastable and Unstable Foams

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