A Flexible and Highly Pressure‐Sensitive Graphene–Polyurethane Sponge Based on Fractured Microstructure Design

Yao, Hong‐Bin; Jin, G.; Wang, Changfeng; Wang, Xu; Hu, Wei; Zheng, Zhen; Ni, Yong; Yu, Shu‐Hong

doi:10.1002/adma.201303041

Cited by 1,032 publications

(934 citation statements)

References 27 publications

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“…The change in the electrical resistance of the IDE network with graphene on the pressure sensor platform is summarized in Figure 8 for an application of external pressure of up to 3 psi, which corresponds to the typical highest blood pressure range allowed in normal human body. It is believed that the ability of the device to exhibit a large change in the electrical resistance based on the applied pressure is mainly due to the discontinuity in the network of the graphene sensing material similar to the work performed by Gau et al (2009), Luheng et al (2009 and Yao et al (2013). In view of that, for pressure sensing applications, it is advisable that cracks, wrinkles or imperfections in the morphology of the graphene sensing material are introduced.…”

Section: Resultsmentioning

confidence: 93%

Highly-Sensitive Graphene-based Flexible Pressure Sensor Platform

Shazni¹,

Lee²,

Lee³

2017

JSM

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Section: Resultsmentioning

confidence: 93%

Highly-Sensitive Graphene-based Flexible Pressure Sensor Platform

Shazni¹,

Lee²,

Lee³

2017

JSM

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“…Figure 2c shows the relative change in the current upon application of 300 Pa pressure; the inset indicates a short response time of 20 ms, which is better than that for previously reported pressure sensors with a similar design but different sensing materials. 19,32 In addition, in Figure 2d, the change in current with a continuous increase in pressure from 0.1 to 20 kPa shows stable performance. The response and relaxation curves for the pressure sensor over 10 000 loading/ unloading cycles under 1 kPa are shown in Figure 2e.…”

Section: Resultsmentioning

confidence: 98%

Polyurethane foam coated with a multi-walled carbon nanotube/polyaniline nanocomposite for a skin-like stretchable array of multi-functional sensors

Hong

Park

et al. 2017

NPG Asia Mater

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Body-attachable sensors can be applied to electronic skin (e-skin) as well as safety forewarning and health monitoring systems. However, achieving facile fabrication of high-performance, cost-effective sensors with mechanical stability in response to deformation due to body movement is challenging. Herein we report the material design, fabrication and characteristics of a skin-like stretchable array of multi-functional (MF) sensors based on a single sensing material of polyurethane foam coated with multi-walled carbon nanotube/polyaniline nanocomposite, which enables simultaneous detection of body temperature, wrist pulse and ammonia gas. These sensors exhibit high sensitivity, fast response and excellent durability. Furthermore, the fabricated sensor array shows stable performance under biaxial stretching up to 50% and attachment to skin owing to the use of directprinted Galinstan liquid metal interconnections. This work proposes a facile method for fabrication of high-performance, stretchable MF sensors via appropriate selection of sensor design and functional materials that are applicable to e-skin and health monitoring systems. NPG Asia Materials (2017) 9, e448; doi:10.1038/am.2017.194; published online 17 November 2017 INTRODUCTIONWearable electronics have attracted considerable attention for use in electronic skin (e-skin) and health monitoring systems in order for a comfortable and secure life. 1-5 e-Skin is a human interactive device that can simultaneously sense signals from the body and respond to the environment. Thus it should be capable of measuring the five types of senses (taste, sight, hearing, olfactory and touch sensation) with high sensitivity and show mechanical stability against deformation due to skin movement. As a result, e-skin is required to be very thin and have a strain-relaxed design. 6 Because of the increasing importance of e-skin, extensive efforts have been undertaken to develop various sensors with high sensitivity. 7 Beyond the conventional sensor that can detect a single stimulus, novel advanced sensors for simultaneous monitoring of multiple stimuli (multi-functional (MF) sensors) have been actively investigated. 8,9 For practical application of such MF sensors, it is necessary to eliminate the interference between different stimuli that is commonly observed in conventional MF sensors, 10 in addition to fabricating cost-effective sensors on a deformable substrate. Development of MF sensors that transduce different stimuli into separate signals can intrinsically minimize signal interference, thus allowing for sensitive detection of multiple parameters, such as temperature and pressure, in a single device without decoupling analysis. Many power-

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“…Besides the methods mentioned above, solution casting, spin coating, spray coating and dip coating [42][43][44][45] have also been explored for the preparation of graphene papers or films. For example, GO or rGO solution was deposited on poly(ethylene terephthalate) (PET), SiO 2 / P++Si and Au via various techniques to prepare thin films [46][47][48][49], although it is still a challenge to obtain graphene films with uniform thickness and few wrinkles by such type of approaches.…”

Section: Other Solution Processing Methodsmentioning

confidence: 99%

Graphene-Paper Based Electrochemical Sensors

Zhang¹,

Halder²,

Cao³

et al. 2017

Electrochemical Sensors Technology

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Graphene paper as a new form of graphene-supported nanomaterials has received worldwide attention since its first report in 2007. Due to their high flexibility, lightweight and good electrical conductivity, graphene papers have demonstrated the promising potential for crucial applications in electrochemical sensors and energy technologies among others. In this chapter, we present some examples to overview recent advances in the research and development of two-dimensional (2D) graphene papers as new materials for electrochemical sensors. The chapter covers the design, fabrication, functionalization and application evaluations of graphene papers. We first summarize the mainstream methods for fabrication of graphene papers/membranes, with the focus on chemical vapour deposition techniques and solution-processing assembly approaches. A large portion of this chapter is then devoted to the highlights of specific functionalization of graphene papers with polymer and nanoscale functional building blocks for electrochemical-sensing purposes. In terms of electrochemical-sensing applications, the emphasis is on enzyme-graphene and nanoparticle-graphene paper-based systems for the detection of glucose. We finally conclude this chapter with brief remarks and outlook.

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A Flexible and Highly Pressure‐Sensitive Graphene–Polyurethane Sponge Based on Fractured Microstructure Design

Cited by 1,032 publications

References 27 publications

Highly-Sensitive Graphene-based Flexible Pressure Sensor Platform

Highly-Sensitive Graphene-based Flexible Pressure Sensor Platform

Polyurethane foam coated with a multi-walled carbon nanotube/polyaniline nanocomposite for a skin-like stretchable array of multi-functional sensors

Graphene-Paper Based Electrochemical Sensors

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