Multi-functional stretchable sensors based on a 3D-rGO wrinkled microarchitecture

Jia, Jin; Huang, Guotao; Wang, Mingti; Lv, Yunyun; Chen, Xiangyang; Deng, Jianping; Pan, Kai

doi:10.1039/c9na00429g

Cited by 11 publications

(5 citation statements)

References 50 publications

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“…In Figure 3f, we compare the gauge factor and workable sensing strain range of our strain sensor with those of the previously reported piezoresistive strain sensors with the surface buckling method. [22][23][24][25][26][27][28] The work of these peers falls into three categories including metals, carbon materials, and semiconductor materials such as ITO in this work. It is found that the ITObased strain sensor in this work exhibits the highest sensitivity of 610 compared to the reported sensors, and promotes the recording sensitivity of the same type of sensors nearly by one order of magnitude.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, surface buckling has been explored to develop stretchable piezoresistive strain sensors with carbon or metal materials. [22][23][24][25][26][27][28] The sensitivity of these devices is mainly decided by the geometric effect since the resistivities of carbon or metal materials change little versus strain. Carbon-based strain sensors that are made of 2D materials exhibit the large stretchability due to the small mechanical strengths.…”

Section: Introductionmentioning

confidence: 99%

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Transparent and Stretchable Piezoresistive Strain Sensors with Buckled Indium Tin Oxide Film

Kong

Zhao

et al. 2023

Adv Elect Materials

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Owing to excellent performance and a simple mechanism, stretchable piezoresistive strain sensors have been applied to human skin for monitoring physical activities, physiological activities, etc. However, it is still a challenge to simultaneously realize highly sensitive and stretchable piezoresistive strain sensors with high optical transparency. This study reports a transparent and stretchable piezoresistive strain sensor with 2D surface buckling by fabricating ultrathin indium tin oxide (ITO) film on the biaxially pre-stretched polyacrylate (VHB) elastomer followed by pre-stretch releasing. To the authors' knowledge, semiconductors are applied for a stretchable piezoresistive strain sensor for the first time. Furthermore, this strain sensor exhibits a high sensitivity of 569, a high transparency of 88% and a high biaxial stretchability of 110% at the same time. This device demonstrates the good long-term stability over 500 stretching-relaxing cycles. The high sensitivity can be mainly attributed to the piezoresistive effect of the semiconductor where carrier mobility and the resulting resistivity can be significantly changed by the strain. The strain sensors attached to human skin are used to monitor many human motions such as chewing, swallowing, breathing, and walking. ITO-based strain sensors pave the way toward the development of highly stretchable and sensitive wearable electronics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transparent and Stretchable Piezoresistive Strain Sensors with Buckled Indium Tin Oxide Film

Kong

Zhao

et al. 2023

Adv Elect Materials

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“…The disappearing characteristic peaks of oxygen‐containing functional groups and the significantly decreased relative oxygen content on rGO film can exemplify (from Fourier transform infrared (FTIR) spectra and energy dispersive X‐ray mapping images of Figures S1,S2, Supporting Information) that the GO film has been well reduced. [ 32,33 ] In the next step, the pre‐stretched rGO substrate was applied as the receiver for the subsequent electrospinning process of ferric chloride (FeCl 3 )‐doped poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP) nanofiber film. After releasing the pre‐stress, a light yellow WNF with a large specific surface area was formed (Figure S3a, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Fingerprint‐Inspired High Conductive PEDOT‐Coated Nanofiber Film for Ultra‐Sensitive, Stretchable, and Flexible Piezoresistive Sensor

Fang

Zhao

Qin

et al. 2021

Adv Materials Technologies

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Flexible piezoresistive sensors are extensively applied in smart health monitoring systems due to their excellent shape adaptability, portability, and comfortableness. However, constructing piezoresistive sensors with both high sensitivities and wide pressure range remains a huge challenge. In this paper, inspired by the fingerprint structure, a 3D poly (3,4‐ethylenedioxythiophene) coated wrinkled nanofiber film based flexible piezoresistive sensor is developed through a simple method. Benefiting from the undulating structure of the conductive nanofiber film, there are abundant micro‐ridges on the surface of the rough nanofiber network, which make a significant contribution to the construction of new conductive paths under different pressures. This assembled sensor exhibits an ultra‐high sensitivity of 397.54 kPa−1 in a small pressure range (0–3 kPa) as well as an ultra‐wide pressure range of 0–25.48 kPa. In addition, it can maintain stable signal output even after 16 500 compression cycles. Furthermore, this high‐performance piezoresistive sensor is demonstrated to accurately identify the wrist pulse and joint bending of human body, which enables an extensive application prospect in the field of wearable electronics.

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“…Also, because laser-reduced graphene is flexible, highly conductive, and green and non-toxic, it can be applied to the manufacture of human wearable smart sensors [31][32][33]. Although many graphene-based piezoresistive sensors have been reported [7,[34][35][36], there is still room for improvement in terms of sensitivity and linear range. Compared with the layered structure of pure graphene films, the graphene-based piezoresistance sensor with wrinkle [37], conical frustum-like [38], pyramid [39] and other microstructures [40,41] prepared by different methods always show better sensing performance.…”

Section: Introductionmentioning

confidence: 99%

Gradient expanded-structured graphene pressure sensor prepared by one-step laser reduction with superhigh sensitivity and ultrawide detection range

Lv¹,

Qin²,

Fang³

et al. 2023

Smart Mater. Struct.

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With the advancement of information data, intelligent devices have put forward higher performance requirements for pressure sensors. Reasonable structural design of active material provides an effective way for the preparation of high-performance pressure sensor. Herein, we propose a simple method to prepare gradient expandion-structured graphene-based flexible pressure sensors by laser reduction. There are many gas gaps exist under the graphene surface, showing a certain gradient as a whole. Benefiting from the synergy effect of the unique structure, the designed piezoresistive sensor shows high sensitivity (127.8 kPa-1 in the range of 0.33 ~ 0.667 kPa), broad linear range (0 ~ 16.7 kPa), low detection limit (33 Pa), short response time (200 ms), and good stability (more than 7000 cycles). Furthermore, the notion of creating and constructing gradient structures has been applied to practical applications of position sensing, and possible applications for mapping the position and intensity of pressure have also been investigated.

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Multi-functional stretchable sensors based on a 3D-rGO wrinkled microarchitecture

Abstract: A 3D-rGO wrinkled film with a graphene expansion structure and stretchable 3D-rGO bulge for application in multi-functional sensors is reported.

Cited by 11 publications

References 50 publications

Transparent and Stretchable Piezoresistive Strain Sensors with Buckled Indium Tin Oxide Film

Transparent and Stretchable Piezoresistive Strain Sensors with Buckled Indium Tin Oxide Film

Fingerprint‐Inspired High Conductive PEDOT‐Coated Nanofiber Film for Ultra‐Sensitive, Stretchable, and Flexible Piezoresistive Sensor

Gradient expanded-structured graphene pressure sensor prepared by one-step laser reduction with superhigh sensitivity and ultrawide detection range

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