An Elastic Transparent Conductor Based on Hierarchically Wrinkled Reduced Graphene Oxide for Artificial Muscles and Sensors

Mu, Jiuke; Hou, Chengyi; Wang, Gang; Wang, Xuemin; Zhang, Qinghong; Li, Yaogang; Wang, Hongzhi; Zhu, Meifang

doi:10.1002/adma.201603395

Cited by 151 publications

(119 citation statements)

References 36 publications

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“…Particularly, introducing short-and long-period wrinkles in the N-doped RGO films can further improve the performance. Mu et al [215] demonstrated that due to the hierarchical wrinkles of the N-doped RGO layer, the transparent conductor can even show conductivity of 100-457 /square and transmittance of 67-85% with high elasticity, which can be operated under large tensile strain 48 of ~400% and bending deformation of ~180º.…”

Section: Transparent Conductorsmentioning

confidence: 99%

Physical properties and device applications of graphene oxide

2020

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Graphene oxide (GO), the functionalized graphene with oxygenated groups (mainly epoxy and hydroxyl), has attracted resurgent interests in the past decade owing to its large surface area, superior physical and chemical properties, and easy composition with other materials via surface functional groups. Usually, GO is used as an important raw material for mass production of graphene via reduction. However, under different conditions, the coverage, types, and arrangements of oxygencontaining groups in GO can be varied, which give rise to excellent and controllable physical properties, such as tunable electronic and mechanical properties depending closely on oxidation degree, suppressed thermal conductivity, optical transparency and fluorescence, and nonlinear optical properties. Based on these outstanding properties, many electronic, optical, optoelectronic, and thermoelectric devices with high performance can be achieved on the basis of GO. Here we present a comprehensive review on recent progress of GO, focusing on the atomic structures, fundamental physical properties, and related device applications, including transparent and flexible conductors, field-effect transistors, electrical and optical sensors, fluorescence quenchers, optical limiters and absorbers, surface enhanced Raman scattering detectors, solar cells, light-emitting diodes, and thermal rectifiers.

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Section: Transparent Conductorsmentioning

confidence: 99%

Physical properties and device applications of graphene oxide

2020

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“…Therefore, the composite material made from prestrain buckling can be stretched safely to the original prestrain, without affecting the robustness and conductivity of the device. To date, buckling methods have enabled many flexible but stiff materials stretchable, such as gold, silver, and graphene‐based materials, which demonstrate potential applications such as electrodes and stretchable sensors. Recently, buckling has been used to realize more complex 3D conducting networks comparable to the human biological system (cytoskeletal webs, vasculature networks) from 2D precursors.…”

Section: Skin‐inspired Multifunctional Interfacesmentioning

confidence: 99%

Bioinspired Prosthetic Interfaces

Ali

Cheng

et al. 2020

Adv Materials Technologies

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Mechanical replacement prosthetics have advanced in both esthetics and mechanical functions, but still require progress in attaining full natural functionality via tactile feedback. Through bioinspiration of the somatosensory system, recent works in the development of materials and technologies at three critical interfaces have shown great advancements: skin‐inspired multifunctionality at the prosthetic level using flexible electronics, artificial transmission of the biosignals between the prosthesis and nervous system, and stimulation and recording of these signals with mechanically compliant, implantable neural interfaces. Herein, a systematic study of the artificial skin sensation pathways for the prosthetic interfaces is discussed together with the current state‐of‐the‐art technologies and prospective strategies to enable the complete sensory feedback loop in prosthetics through the use of biomimetic sensing platforms, artificial synapses, and neural interrogation electronics.

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“…Smart optical materials with dynamic reversible changes in transparency and/or color in responsive to physical and chemical stimuli have attracted significant attentions due to their important applications in sensing devices, optical data storage, smart windows, etc . Typically, the dynamic tuning of such optical properties is realized through an external stimuli‐triggered switch in chemistry and/or morphology/geometry to produce a reversible change in optical properties, including the use of liquid crystals, suspended particles, photonic crystals, and chromogenic materials driven by temperature, light, mechanical force, magnetic field, and electrical field .…”

Section: Introductionmentioning

confidence: 99%

A General and Robust Strategy for Fabricating Mechanoresponsive Surface Wrinkles with Dynamic Switchable Transmittance

Jiang

Liu

Gao

et al. 2018

Advanced Optical Materials

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including the use of liquid crystals, [7] suspended particles, [8] photonic crystals, [9] and chromogenic materials driven by temperature, [10] light, [11] mechanical force, [6,12] magnetic field, [13] and electrical field. [14] However, it still faces great challenges in practical uses of the smart optical materials, especially in smart windows, for example, due to the complicated process, high cost, and low efficiency for the preparation and fabrication of such smart windows. Therefore, it is highly desirable to develop simple and effective strategies to design new smart optical materials with rapid responsive time, large transmittance modulation, and good repeatability, which may open up new opportunities for applications in large-area smart windows.Wrinkling (or buckling) is a ubiquitous phenomenon that occurs in both natural [15] and artificial systems, [12a,16] with dimensions across a wide range of length scale from meters down to nanometers. Artificial wrinkles can be generated by introducing compressive stresses to a skin layer/elastomer substrate bilayer film through various approaches, such as thermal stress, [17] mechanical stress, [18] capillary force, [19] light-driven photoisomerization, [20] and osmotic pressure. [21] Owing to their spontaneous nature, versatility, and tunability or even total reversibility in response to external stimuli, surface wrinkling has provided an effective platform to create smart, controllable, and responsive surface topography and subsequently to dynamically tune functionality, which inspired various important applications including flexible electronic devices, [22] tunable diffraction gratings, [23] microlens arrays, [24] dry adhesives, [25] dynamic scaffolds, [26] and optical devices. [27] Since mechanical force as an external stimuli has many advantages such as simple and independent control of the amount, direction, and timing of strain, [28] some recent studies have demonstrated that mechanoresponsive surface wrinkles offer an effective and repeatable strategy to dynamically tune optical properties on-demand by changing the surface topography in responsive to mechanical force. For example, the light transmittance of mechanoresponsive surface wrinkles for smart windows has been dynamically tuned by means of micro-and nanopillar arrays on wrinkled elastomers, [28,29] harnessing Preparation of surface wrinkles on a skin layer/elastomer substrate bilayer film has attracted extensive attention because of their unique and broad applications in flexible electronic devices, tunable diffraction gratings, and smart windows. However, it still remains a great challenge to develop a general strategy for fabricating mechanoresponsive surface wrinkles using various skin layer materials with wide tunability of wrinkles' wavelength and amplitude, large optical modulation range, rapid optical switching rate, and high stability. Here, a general, simple, and cost-effective strategy is reported, through uniaxially stretching and subsequently releasing skin layer/elastomer substrate...

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An Elastic Transparent Conductor Based on Hierarchically Wrinkled Reduced Graphene Oxide for Artificial Muscles and Sensors

Cited by 151 publications

References 36 publications

Physical properties and device applications of graphene oxide

Physical properties and device applications of graphene oxide

Bioinspired Prosthetic Interfaces

A General and Robust Strategy for Fabricating Mechanoresponsive Surface Wrinkles with Dynamic Switchable Transmittance

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