Interfacial Behavior of Oligo(Ethylene Glycol) Dendrons Spread Alone and in Combination with a Phospholipid as Langmuir Monolayers at the Air/Water Interface

Shi, Da; Nguyen, Dinh-Vu; Maaloum, Mounir; Gallani, Jean‐Louis; Felder‐Flesch, Delphine; Krafft, Marie Pierre

doi:10.3390/molecules24224114

Cited by 4 publications

(5 citation statements)

References 42 publications

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“…Nontypical amphiphiles include polymers, carbonaceous compounds (carbon nanotubes and graphene), silica, other inorganic and organic−inorganic hybrid materials. Examples of inorganic and organic−inorganic materials are macrocyclic molecules, 260−265 dendrimers, 266,267 silica, 268−271 carbon-based particles, 272 black phosphorus, 273 clay nanosheets, 274 magnetic soft spheres, 275 gold nanoparticles, 276 CdS nanoparticles/quantum dots, 277,278 ionic liquids, 279−282 diureasil hybrid compounds, 283,284 and inorganic nanowires. 285 Since Sections 6 and 7 will cover considerable work on LB films of nontypical amphiphiles, in this section, we restrict ourselves to providing a general discussion of the challenges and opportunities in producing such Langmuir and LB films.…”

Section: Langmuir and Lb Films Of Nontypicalmentioning

confidence: 99%

“…Nontypical amphiphiles include polymers, carbonaceous compounds (carbon nanotubes and graphene), silica, other inorganic and organic–inorganic hybrid materials. Examples of inorganic and organic–inorganic materials are macrocyclic molecules, − dendrimers, , silica, − carbon-based particles, black phosphorus, clay nanosheets, magnetic soft spheres, gold nanoparticles, CdS nanoparticles/quantum dots, , ionic liquids, − diureasil hybrid compounds, , and inorganic nanowires …”

Section: Langmuir and Lb Films Of Nontypical Amphiphilesmentioning

confidence: 99%

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The Past and the Future of Langmuir and Langmuir–Blodgett Films

2022

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The Langmuir–Blodgett (LB) technique, through which monolayers are transferred from the air/water interface onto a solid substrate, was the first method to allow for the controlled assembly of organic molecules. With its almost 100 year history, it has been the inspiration for most methods to functionalize surfaces and produce nanocoatings, in addition to serving to explore concepts in molecular electronics and nanoarchitectonics. This paper provides an overview of the history of Langmuir monolayers and LB films, including the potential use in devices and a discussion on why LB films are seldom considered for practical applications today. Emphasis is then given to two areas where these films offer unique opportunities, namely, in mimicking cell membrane models and exploiting nanoarchitectonics concepts to produce sensors, investigate molecular recognitions, and assemble molecular machines. The most promising topics for the short- and long-term prospects of the LB technique are also highlighted.

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Section: Langmuir and Lb Films Of Nontypicalmentioning

confidence: 99%

Section: Langmuir and Lb Films Of Nontypical Amphiphilesmentioning

confidence: 99%

The Past and the Future of Langmuir and Langmuir–Blodgett Films

2022

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“…Subsequent decantation of non‐gelated THF or cold filtration led to highly pure ASP‐1 , which is amphiphilic based on its hydrophobic/hydrophilic substituents. Importantly, hydrophilic oligoethylene glycol units are essentially dissolved in the water subphase when spread at an air–water interface [ 31 ] while the hydrophobic alkoxy‐substituted group is repelled away from the water subphase. This provides a strong basis for the assembly of the molecules especially where a lateral force can be applied to manipulate the molecular spacing in situ.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled 2D Sheets of an Amphiphilic Sexiphenyl Exhibit Intense Polarized Blue Emission in the Solid State

Mondal,

Hill,

Manna

et al. 2024

Advanced Optical Materials

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Distinct from inorganic 2D nanomaterials (e.g., graphene, MoS2, etc,), self‐assembled organic 2D materials are significant due to the unique advantages of fine structure tunability and functionality. Electronically and photofunctionally‐active compounds (e.g., pentacene, p‐sexiphenyl) are highly attractive for applications but are limited by difficult handling and the existence of only a few native structures of the compounds. Here, it is shown that a p‐sexiphenyl derivative incorporated into 2D multilamellar sheets with chromophores oriented in the layers exhibits a significant polarization of photoluminescence. Highly emissive, amphiphilic sexiphenyl with hydrophilic/hydrophobic groups self‐assembles at air–water interface with chromophore orientation in the resulting films being controlled by monolayer compression. Large‐area multilamellar structures with p‐sexiphenyl chromophores highly oriented against the 2D plane are prepared by consecutive film transfers. The 2D sheets exhibit significant polarization of photoluminescence with polarization ratio 0.8 between orthogonal in‐plane axes. Notably, multilamellar structures cannot be established for the same p‐sexiphenyl using thermotropic processing thus emphasizing the importance of the 2D sheet multilayer synthesis process. Amphiphile design can be applied for the tailored synthesis of large‐area multilayered 2D sheets and used to construct highly efficient light‐emitting devices.

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“…These structures could be similar to the ones found for monolayers of poly(methylmethacrylate) in which at the interface, polymer coils adopt a soft-disk (pancake) shape; this behavior was associated with a fluid-to-soft-glass transition as the polymer concentration increases above a critical packing fraction at a constant temperature . Other authors have related the different phases observed in the isotherms with conformational transitions observed for deblock copolymers (e.g., poly(styrene)-poly(ethylene oxide). , We present amplitude AFM images for the PSMA photo-polymerized films as they allowed us to better highlight the surface morphological and structural differences of the films due to different irradiation times (See Supporting Information). Figure c shows the AFM image of the PSMA 180 LB film.…”

Section: Results and Discussionmentioning

confidence: 99%

“…39 Other authors have related the different phases observed in the isotherms with conformational transitions observed for deblock copolymers (e.g., poly-(styrene)-poly(ethylene oxide). 34,40 We present amplitude AFM images for the PSMA photo-polymerized films as they allowed us to better highlight the surface morphological and structural differences of the films due to different irradiation times (See Supporting Information). Figure 4c shows the AFM image of the PSMA 180 LB film.…”

Section: Characterization Of Monolayermentioning

confidence: 99%

On the Preparation of Thin Films of Stearyl Methacrylate Directly Photo-polymerized at the Air–Water Interface

et al. 2022

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Characterization of bidimensional polymeric films at the air−water interface in the Langmuir trough, despite being a recurrent topic, usually refers to films of already formed polymeric materials, with very scarce reports on direct polymerization at the air−water interface. In the present work, we studied the photopolymerization of stearyl methacrylate directly at the air−water interface under a nitrogen atmosphere, with the radical initiator solubilized in the aqueous phase. Two-dimensional (2D) polymerization was monitored by measuring the pressure−area isotherm at different irradiation times. The polymerization leads to a film with an isotherm different from that observed for the monomer, where the surface pressure is directly related to the irradiation time. The shape of this isotherm confirms the presence of a compressed liquid phase, where a higher order can be attained as a consequence of stronger packing forces involving polymer chains. The presence of inter-chain interactions allows rearrangements on the surface of the subphase, and even before the collapse a dense 2D ordering (with a solid phase-like behavior) can be observed. We present a new one-step, solvent-free procedure to obtain a photopolymeric film directly at the air−water interface, which can be transferred to a solid surface by the Langmuir−Blodgett method, allowing film preparation of controlled thickness. Films were characterized by measuring properties such as thickness, roughness, and hydrophobicity and comparing them with films obtained from a conventional polymer. We report the differences between the interfacial behavior of amphiphilic molecules and nanomaterials such as films obtained by photo-polymerization, PSMA, directly on the air−water interface.

show abstract

Interfacial Behavior of Oligo(Ethylene Glycol) Dendrons Spread Alone and in Combination with a Phospholipid as Langmuir Monolayers at the Air/Water Interface

Cited by 4 publications

References 42 publications

The Past and the Future of Langmuir and Langmuir–Blodgett Films

The Past and the Future of Langmuir and Langmuir–Blodgett Films

Self‐Assembled 2D Sheets of an Amphiphilic Sexiphenyl Exhibit Intense Polarized Blue Emission in the Solid State

On the Preparation of Thin Films of Stearyl Methacrylate Directly Photo-polymerized at the Air–Water Interface

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