The elastic response of graphene oxide gels as a crumpling phenomenon

Barwich, Sebastian; Möbius, Matthias E.

doi:10.1039/d2sm00918h

Cited by 2 publications

(2 citation statements)

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“…S11 ). This microstructure-independent elasticity was similar to the previously reported aqueous graphene oxide gels [ 42 ]. It should be noted that all the rheological measurements in this work were commenced straight after loading the sample and the viscoelasticity of MXene gels did not display significant variations over time as illustrated in Fig.…”

Section: Resultssupporting

confidence: 90%

Versatile MXene Gels Assisted by Brief and Low-Strength Centrifugation

Yu,

Yang,

Wang

et al. 2024

Nano-Micro Lett.

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Due to the mutual repulsion between their hydrophilic surface terminations and the high surface energy facilitating their random restacking, 2D MXene nanosheets usually cannot self-assemble into 3D macroscopic gels with various applications in the absence of proper linking agents. In this work, a rapid spontaneous gelation of Ti3C2Tx MXene with a very low dispersion concentration of 0.5 mg mL−1 into multifunctional architectures under moderate centrifugation is illustrated. The as-prepared MXene gels exhibit reconfigurable internal structures and tunable rheological, tribological, electrochemical, infrared-emissive and photothermal-conversion properties based on the pH-induced changes in the surface chemistry of Ti3C2Tx nanosheets. By adopting a gel with optimized pH value, high lubrication, exceptional specific capacitances (~ 635 and ~ 408 F g−1 at 5 and 100 mV s−1, respectively), long-term capacitance retention (~ 96.7% after 10,000 cycles) and high-precision screen- or extrusion-printing into different high-resolution anticounterfeiting patterns can be achieved, thus displaying extensive potential applications in the fields of semi-solid lubrication, controllable devices, supercapacitors, information encryption and infrared camouflaging.

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Section: Resultssupporting

confidence: 90%

Versatile MXene Gels Assisted by Brief and Low-Strength Centrifugation

Yu,

Yang,

Wang

et al. 2024

Nano-Micro Lett.

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“…For example, recently studied low ϕ colloidal graphene sheets attribute compressive response beyond the gelation point to a similar bending/crumpling mechanism, though with a different scaling with ϕ. [ 36 ] Therefore, while this linear relation holds within this range, more considerations may have to be made for networks with parameters sufficiently outside the explored range.…”

Section: Modulus Measurementsmentioning

confidence: 99%

Mechanical Properties of Conducting Printed Nanosheet Network Thin Films Under Uniaxial Compression

Sinnott,

Kelly,

Gabbett

et al. 2023

Advanced Materials

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Thin film networks of solution processed nanosheets show remarkable promise for use in a broad range of applications including strain sensors, energy storage, printed devices, textile electronics and more. While it is known that their electronic properties rely heavily on their morphology, little is known of their mechanical nature, a glaring omission given the effect mechanical deformation has on the morphology of porous systems and the promise of mechanical post processing for tailored properties. Here, we employ a recent advance in thin film mechanical testing called the Layer Compression Test to perform the first in situ analysis of printed nanosheet network compression. Due to the well‐defined deformation geometry of this unique test, we are able to explore the out‐of‐plane elastic, plastic, and creep deformation in these systems, extracting properties of elastic modulus, plastic yield, viscoelasticity, tensile failure and sheet bending vs. slippage under both out of plane uniaxial compression and tension. We characterise these for a range of networks of differing porosities and sheet sizes, for low and high compression, as well as the effect of chemical cross linking. We explore graphene and MoS2 networks, from which the results can be extended to printed nanosheet networks as a whole.This article is protected by copyright. All rights reserved

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The elastic response of graphene oxide gels as a crumpling phenomenon

Abstract: The broad spectrum of chemical and electronic properties of 2D nanomaterials makes them attractive in a wide range of applications, especially in the context of printed electronics. Therefore, understanding the...

Cited by 2 publications

References 46 publications

Versatile MXene Gels Assisted by Brief and Low-Strength Centrifugation

Versatile MXene Gels Assisted by Brief and Low-Strength Centrifugation

Mechanical Properties of Conducting Printed Nanosheet Network Thin Films Under Uniaxial Compression

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