A highly sensitive graphene woven fabric strain sensor for wearable wireless musical instruments

Liu, Xu; Tang, Chen; Du, Xiaohan; Xiong, Shuai; Xi, Siyuan; Liu, Yuefeng; Shen, Xi; Zheng, Qingbin; Wang, Zhenyu; Wu, Ying; Horner, Andrew; Kim, Jang Kyo

doi:10.1039/c7mh00104e

Cited by 200 publications

(148 citation statements)

References 64 publications

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“…Metal NPs (e.g., Ag NPs) type of strain sensors usually have a disadvantage in terms of maximum strain ranges and demand high sintering temperature (> 150 °C) . Moreover, strain sensors based on graphene and ionic liquids usually possess low sensitivity,6a,20 and the conductivity of conductive polymers are significantly lower than Ag NWs . However, strain sensors possessing high sensitivity and wide sensing range are crucial for human motion detection.…”

Section: Methodssupporting

confidence: 67%

One‐Step‐Printed, Highly Sensitive, Textile‐Based, Tunable Performance Strain Sensors for Human Motion Detection

Luo

Tian

Liu

et al. 2020

Adv Materials Technologies

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manufacturing methods, screen printing solved these challenges owing to its simple process, low-cost, easily implementing patterning, and volume-production features. By changing the pattern on the screen plate, a variety of shapes of conductive patterns are easily obtained through screen printing. Moreover, the fabricated strain sensors via screen-printing method could shape a unique microstructure since the conductive ink layer at the location under mesh-opening is higher than ones under screen mesh, enabling the sensor to improve the sensitivity. [11] Currently, various conductive materials explored for building percolating networks of strain sensors mostly include carbon nanotubes (CNTs), [12] metal nanoparticles (NPs), [13] metal nanowires (NWs), [1d,3c,14] graphene, [15] ionic liquids, [16] and conductive polymers (e.g., poly(pyrrole), poly(3,4-ethylenedioxythiophene):pol ystyrene sulfonate, poly(aniline)). [17] However, the uniformity worries and low gauge factor (GF) of CNTs-based strain sensors limit their practical application in the field of sensing. [18] Metal NPs (e.g., Ag NPs) type of strain sensors usually have a disadvantage in terms of maximum strain ranges and demand high sintering temperature (> 150 °C). [19] Moreover, strain sensors based on graphene and ionic liquids usually possess low sensitivity, [6a,20] and the conductivity of conductive polymers are significantly lower than Ag NWs. [17] However, strain sensors possessing high sensitivity and wide sensing range are crucial for human motion detection. Therefore, Ag NWs-based strain sensors become a strong candidate for fabricating high-performance sensor in which Ag NWs possess many superior properties, such as excellent conductivity, straightforward preparation process, relatively low sintering temperature (120 °C), etc. The Ag NW is a mature nanomaterial, its applications will promote the commercialization and further reduce the cost of device fabrication. However, it remains a huge challenge to large-scale manufacture printed strain sensors with Ag NWs inks through one-step screen-printing technology since the Ag NWs are generally difficult to disperse uniformly in most binders owing to their high aspect ratio.Herein, Ag NWs with high aspect ratio are synthesized via an improved solvothermal method and employed to formulate the conductive ink. Rheological behavior tests are applied to study the printability of the conductive ink. Then the Ag NWs inks are transferred easily onto the textile by screen printing to fabricate textile-based strain sensors (TSSs). Furthermore, the TSSs possess tunable sensing performance by tuning the various line widths and line types of Ag NWs layer on the TSSs, which is Wearable strain sensors have attracted a lot of interests due to their unlimited prospects in applications such as human motion detections, electronic skin, and human-computer interactions. However, the complex manufacturing methods are generally used to fabricate the strain sensors with wide sensing ranges and high sensitivity. Herein...

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Section: Methodssupporting

confidence: 67%

One‐Step‐Printed, Highly Sensitive, Textile‐Based, Tunable Performance Strain Sensors for Human Motion Detection

Luo

Tian

Liu

et al. 2020

Adv Materials Technologies

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“…Notably, the sensor conductivity remained almost unchanged after stretching, indicating that the GNP network sandwiched between PDMS is highly stable and robust and that the conductance recovery is fast and consistent even at a high frequency. Figure 4(b) summarizes the gauge factors and maximum stretchabilities of previously reported flexible strain sensors [5,14,[26][27][28][29][30][31][32][33][34][35][36][37][38][39]. As indicated by the dashed line, the gauge factor and stretchability have a trade-off.…”

Section: Change Of Electro-mechanical Properties Of G-pdms Sensors Apmentioning

confidence: 99%

“…(b) Summary of the gauge factors and maximum stretchability of the flexible strain sensors. The dashed line indicates the correlation between the gauge factor and the maximum stretchability, which exhibits a tradeoff relationship[5,14,[26][27][28][29][30][31][32][33][34][35][36][37][38].…”

mentioning

confidence: 99%

Highly flexible graphene nanoplatelet-polydimethylsiloxane strain sensors with proximity-sensing capability

Lee

Kim

Lee

et al. 2020

Mater. Res. Express

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Flexible strain sensors are essential for providing electronic skin with the ability to detect motions and pressure, enabling their use in health applications and robotics. In this context, strain sensors should simultaneously guarantee a high sensitivity and flexibility, with a fast response when applied to the detection of various human motions. Here, we demonstrate a flexible strain sensor made of graphene nanoplatelets encapsulated between two elastomer films with a high sensitivity and stretchability. The liquid-exfoliated graphene nanoplatelets were spray-coated on the first elastomer film and then encapsulated by the second elastomer film. The encapsulated graphene sensor exhibited a high gauge factor, fast responsivity, and high durability. It proved stretchable up to 290% and highly bendable (operating at almost zero bending radius). As an additional key feature, proximity sensing to detect remote motions of a distant object was demonstrated, owing to the unique characteristic of graphene, i.e., variations in its electrostatic in response to the interaction between the surface charges of the elastomer and the electrostatic charges of the remote object. Our work introduces a novel route for the fabrication of flexible graphene sensors with proximitysensing capability, which are useful for wearable smart devices and human motion detection.

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“…Various strategies have been developed to fabricate flexible strain sensors, including modulating aspect ratios, incorporation, orientation, and selective distribution, surface functionalization of active elements or conductive fillers . Among published examples, strain sensors based on graphene woven fabric structure and gold nanostructures have achieved extremely high sensitivity at small deformations. The external strain changes the percolated conductive networks of these composites, which gives an electrical signal output to be detected …”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable, Adaptable, and Durable Strain Sensing Based on a Bioinspired Dynamically Cross‐Linked Graphene/Polymer Composite

Lin

Zhao

Jiang

et al. 2019

Small

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Flexible strain sensors can detect physical signals (e.g., temperature, humidity, and flow) by sensing electrical deviation under dynamic deformation, and they have been used in diverse fields such as human motion detection, medical care, speech recognition, and robotics. Existing sensing materials have relatively low adaptability and durability and are not stretchable and flexible enough for complex tasks in motion detection. In this work, a highly flexible self‐healing conductive polymer composite consisting of graphene, poly(acrylic acid) and amorphous calcium carbonate is prepared via a biomineralization‐inspired process. The polymer composite shows good editability and processability and can be fabricated into stretchable strain sensors of various structures (sandwich structures, fibrous structures, self‐supporting structures, etc.). The developed sensors can be attached on different types of surfaces (e.g., flat, cambered) and work well both in air and under water in detecting various biosignals, including crawling, undulatory locomotion, and human body motion.

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A highly sensitive graphene woven fabric strain sensor for wearable wireless musical instruments

Abstract: Integrated GWF/PDMS composite sensors with Bluetooth wireless communication and smartphone function as a wireless wearable musical instrument.

Cited by 200 publications

References 64 publications

One‐Step‐Printed, Highly Sensitive, Textile‐Based, Tunable Performance Strain Sensors for Human Motion Detection

One‐Step‐Printed, Highly Sensitive, Textile‐Based, Tunable Performance Strain Sensors for Human Motion Detection

Highly flexible graphene nanoplatelet-polydimethylsiloxane strain sensors with proximity-sensing capability

Highly Stretchable, Adaptable, and Durable Strain Sensing Based on a Bioinspired Dynamically Cross‐Linked Graphene/Polymer Composite

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