Graphene Reinforced Carbon Nanotube Networks for Wearable Strain Sensors

Shi, Jidong; Li, Xinming; Cheng, Huanyu; Liu, Zhuangjian; Zhao, Lingyu; Yang, Tingting; Dai, Zhaohe; Cheng, Zengguang; Shi, Enzheng; Yang, Long; Zhang, Zhong; Cao, Anyuan; Zhu, Hongwei; Fang, Ying

doi:10.1002/adfm.201504804

Cited by 342 publications

(221 citation statements)

References 33 publications

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“…[134] Further, nanostructured porous carbon was hybridized with graphene and carbon nanotubes to form hierarchical all-carbon architectures with interconnected micro/ mesopores, which exhibited an extraordinary electrical conductivity for being utilized in lithium-sulfur batteries. For example, Shi et al grew graphene in the voids of ultrathin carbon nanotube film on copper by CVD method for enhancing their strength and load transfer capabilities.…”

Section: Carbon Nanostructuresmentioning

confidence: 99%

Functionalized Hybridization of 2D Nanomaterials

Guan

Han

2019

Advanced Science

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The discovery of graphene and subsequent verification of its unique properties have aroused great research interest to exploit diversified graphene‐analogous 2D nanomaterials with fascinating physicochemical properties. Through either physical or chemical doping, linkage, adsorption, and hybridization with other functional species into or onto them, more novel/improved properties are readily created to extend/expand their functionalities and further achieve great performance. Here, various functionalized hybridizations by using different types of 2D nanomaterials are overviewed systematically with emphasis on their interaction formats (e.g., in‐plane or inter plane), synergistic properties, and enhanced applications. As the most intensely investigated 2D materials in the post‐graphene era, transition metal dichalcogenide nanosheets are comprehensively investigated through their element doping, physical/chemical functionalization, and nanohybridization. Meanwhile, representative hybrids with more types of nanosheets are also presented to understand their unique surface structures and address the special requirements for better applications. More excitingly, the van der Waals heterostructures of diverse 2D materials are specifically summarized to add more functionality or flexibility into 2D material systems. Finally, the current research status and faced challenges are discussed properly and several perspectives are elaborately given to accelerate the rational fabrication of varied and talented 2D hybrids.

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Section: Carbon Nanostructuresmentioning

confidence: 99%

Functionalized Hybridization of 2D Nanomaterials

Guan

Han

2019

Advanced Science

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“…This can be attributed to two factors: (1) higher structural strength and (2) large particle size. The structural strength of graphene is higher than carbon nanotubes [40].…”

Section: Resistance-pressure Relationshipsmentioning

confidence: 91%

Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Ali

Khan

Каримов

et al. 2018

Journal of Nanomaterials

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Carbon nanotubes (CNTs) and graphene have attracted a great deal of interest due to their outstanding mechanical, optical, electrical, and structural properties. Most of the scientists and researchers have investigated the optical and electrical properties of these materials. However, due to unique electromechanical properties of these materials, it is required to explore the piezoresistive properties of bulk nanostructured CNTs, graphene, and CNT-graphene composites. We investigated and compared the sensitivities and piezoresistive properties of sandwich-type pure CNT, pure graphene, and CNT-graphene composite pressure sensors. For all the samples, increase in pressure from 0 to 0.183 kNm −2 results in a decrease in the impedance and direct current (DC) resistance. Sensitivity and percentage decrease in resistance and impedance of CNT-graphene composite were lower than pure CNT while being higher than pure graphene based sample. Moreover, under the same external applied pressure, the sensitivity and percentage decrease in impedance for pure CNT, pure graphene, and CNT-graphene composite were smaller than the corresponding sensitivity and percentage decrease in resistance. The achieved experimental results of the composite sample were compared with simulated results which exhibit reasonable agreement with each other. The deviations of simulated resistance-pressure and impedancepressure curves from experimental graphs were 0.029% and 0.105%, respectively.

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“…Generally, flexible polymers, such as polydimethylsiloxane (PDMS) [50,[90][91][92][93][94][95], ecoflex [28,96,97], polyurethane (PU) [98,99], polyethylene terephthalate (PET) [84,100,101], polyimide (PI) [102,103] and rubber [104,105], are commonly used as the substrates/matrix for the fabrication of sensors due to their excellent flexibility, good thermal and chemical stability. Active materials, such as CNTs [28,[106][107][108][109][110], graphene (including rGO) [83,84,90,100,[111][112][113], metal nanoparticles and nanowires [50,53], semiconductors [114,115], conductive polymers [46,48], and their hybrid structures [116,117], have been intensively investigated. Typically, the sensors based on nanoparticles can achieve high GFs [58].…”

Section: Flexible Strain Sensorsmentioning

confidence: 99%

“…Besides, to fabricate sensors with high sensitivity and flexibility, graphene integrated with metal nanomaterials, or CNTs has attracted much attention [72,117,130,238]. For example, a highly stretchable strain sensors made of graphene and Ag NPs was fabricated [238].…”

Section: Graphene and Hybrid Films For Flexible Sensorsmentioning

confidence: 99%

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Advanced carbon materials for flexible and wearable sensors

et al. 2017

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Flexible and wearable sensors have drawn extensive concern due to their wide potential applications in wearable electronics and intelligent robots. Flexible sensors with high sensitivity, good flexibility, and excellent stability are highly desirable for monitoring human biomedical signals, movements and the environment. The active materials and the device structures are the keys to achieve high performance. Carbon nanomaterials, including carbon nanotubes (CNTs), graphene, carbon black and carbon nanofibers, are one of the most commonly used active materials for the fabrication of high-performance flexible sensors due to their superior properties. Especially, CNTs and graphene can be assembled into various multi-scaled macroscopic structures, including one dimensional fibers, two dimensional films and three dimensional architectures, endowing the facile design of flexible sensors for wide practical applications. In addition, the hybrid structured carbon materials derived from natural bio-materials also showed a bright prospect for applications in flexible sensors. This review provides a comprehensive presentation of flexible and wearable sensors based on the above various carbon materials. Following a brief introduction of flexible sensors and carbon materials, the fundamentals of typical flexible sensors, such as strain sensors, pressure sensors, temperature sensors and humidity sensors, are presented. Then, the latest progress of flexible sensors based on carbon materials, including the fabrication processes, performance and applications, are summarized. Finally, the remaining major challenges of carbon-based flexible electronics are discussed and the future research directions are proposed. [56,57], have been used as the active components for the fabrication of flexible sensors. Among these materials, metal NPs can be used to fabricate flexible sensors with high sensitivity, but the sensing range and stretchability of these sensors are limited [58]. Besides, due to the limited chemical stability and reproducibility of metal nanowires, it is challenging to fabricate stable sensors using metal nanowires [10]. Similarly, conductive polymers with poor stability and conductivity are also difficult to be used for the fabrication of high-performance sensors [59]. In contrast, carbon materials are one of the most commonly investigated materials, especially CNTs and graphene (including graphene oxide (GO) and reduced graphene oxide (rGO)), due to their remarkable mechanical, electrical and thermal properties. To implement macroscopic applications, CNTs and graphene with superior properties in microscopic level should be converted into macroscopic functional assemblies, such as one dimensional (1D) fibers or yarns [60,61], two dimensional (2D) films or sheets [62,63], three dimensional (3D) architectures [64][65][66] (Fig. 1). The multi-scaled macroscopic carbon nanomaterials endow the flexible sensors with high sensitivity, excellent flexibility and good stability as well as desired configurations. Also, lo...

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Graphene Reinforced Carbon Nanotube Networks for Wearable Strain Sensors

Cited by 342 publications

References 33 publications

Functionalized Hybridization of 2D Nanomaterials

Functionalized Hybridization of 2D Nanomaterials

Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Advanced carbon materials for flexible and wearable sensors

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