Recent developments in the preparation and assembly of two-dimensional plate materials in Langmuir–Blodgett films: a review

Zhao, Tianyue; Wang, Ran; Li, Lin; Jiao, Tifeng

doi:10.1088/2399-1984/acca56

Cited by 2 publications

(1 citation statement)

References 59 publications

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“…At intermediate compression values, a granular morphology is observed that exhibits empty (dark) regions interspersed with graphene-covered (bright) areas (Figure c). This distribution is expected when hard disks are undergoing a jamming transition, and the observed loose packing represents the highest achievable compression state in the absence of disk deformation and has been observed for the assembly of 2D materials at the air–water interface. , …”

Section: Resultsmentioning

confidence: 96%

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Santos,

Tjarks,

Muthu

et al. 2024

ACS Appl. Nano Mater.

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We demonstrate the strengthening of graphene, an atomically thin carbon allotrope, by out-of-plane folding. Through lateral confinement of graphene at the water−air interface, nanoscale buckling was induced in suspended flakes, leading to an unexpected folding transition beyond a critical surface pressure. The emergence of folding was confirmed by in situ Brewster angle reflectivity and ex situ microscopy, showing a unique "z-laminated" nanostructure. Molecular dynamics simulations indicate that zlamination yields an enhanced adhesion between neighboring flakes compared to lateral sliding, which was confirmed by a surface pressure hysteresis during the folding process. Mechanical testing reveals superior Young's modulus and yield strength when compared to conventional graphene assemblies and even compared to composites. We demonstrate the potential of the z-lamination approach for applications in graphene-based structural materials, tribological layers, and functional electrochemical coatings. Finally, the complete recyclability of z-laminated graphene opens up new routes toward sustainable nanostructured materials.

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Section: Resultsmentioning

confidence: 96%

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Santos,

Tjarks,

Muthu

et al. 2024

ACS Appl. Nano Mater.

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Controlling Supramolecular Self-Assembly and Nanostructures: A Comparative Study in the Solution Phase and at the Air–Water Interface

Das,

Moram,

Viswanath

et al. 2024

ACS Appl. Nano Mater.

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The controlled molecular assembly of small units is a pivotal technology for the development of smart organic materials, serving as a fundamental approach to fabricating nanodevices in the fields of electronics, optoelectronics, and biological sciences. Herein, we have demonstrated how to control the self-assembly behavior of chiral amphiphilic naphthalene diimide derivatives (NDI-L and NDI-D) through different self-assembling methods such as in the solution phase and at the air–water (A-W) interface. NDI-L and NDI-D were self-assembled into nanoparticles with strong mirror-imaged circular dichroism (CD) signals for NDI-L and NDI-D, respectively, in the solution phase (aqueous solution). Intriguingly, multilayers of these systems fabricated using the Langmuir–Blodgett methods lack CD signals. We observed two-dimensional (2D) aggregates with irregular boundaries for both NDI-L and NDI-D having two phases (L2 and L2’ which differ in the tilt) of different elasticities when assembled at the air–water (A-W) interface. This phenomenon demonstrated that NDI chromophores organized themselves differently when they self-assembled in solution compared to when they assembled at the A-W interface. Controlling self-assembly behavior through different techniques will open up an avenue for researchers to develop advanced supramolecular functional materials for potential applications in various fields ranging from material science to biomedicine.

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Recent developments in the preparation and assembly of two-dimensional plate materials in Langmuir–Blodgett films: a review

Cited by 2 publications

References 59 publications

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Controlling Supramolecular Self-Assembly and Nanostructures: A Comparative Study in the Solution Phase and at the Air–Water Interface

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