Direct ink writing of a graphene/CNT/silicone composite strain sensor with a near-zero temperature coefficient of resistance

Zhu, Wenying; Xue, Shuwen; Zhang, Hao; Wang, You-Yong; Huang, Pei; Tang, Zhenhua; Li, Yuanqing; Fu, Shao‐Yun

doi:10.1039/d2tc00918h

Cited by 42 publications

(30 citation statements)

References 47 publications

(62 reference statements)

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“…[ 55 ] SR Si−(CH 3 ) 2 , Si−O−Si, Si−CH 3 , and C−OH characteristic bands of the peak intensity could be observed from 782, 1007, 1257, and 1411 cm −1 to 780, 1003, 1255, and 1406 cm −1 . The downward shift of the peaks for magnetic nanocomposites proves the existence of a molecular relationship between MWCNTs, GR, Fe 3 O 4 , and SR, [ 48,56 ] which is beneficial to enhance the performance of magnetic nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Guo

Hong

Zhao

et al. 2022

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Recently, flexible stretchable sensors have been gaining attention for their excellent adaptability for electronic skin applications. However, the preparation of stretchable strain sensors that achieve dual‐mode sensing while still retaining ultra‐low detection limit of strain, high sensitivity, and low cost is a pressing task. Herein, a high‐performance dual‐mode stretchable strain sensor (DMSSS) based on biomimetic scorpion foot slit microstructures and multi‐walled carbon nanotubes (MWCNTs)/graphene (GR)/silicone rubber (SR)/Fe3O4 nanocomposites is proposed, which can accurately sense strain and magnetic stimuli. The DMSSS exhibits a large strain detection range (≈160%), sensitivity up to 100.56 (130–160%), an ultra‐low detection limit of strain (0.16% strain), and superior durability (9000 cycles of stretch/release). The sensor can accurately recognize sign language movement, as well as realize object proximity information perception and whole process information monitoring. Furthermore, human joint movements and micro‐expressions can be monitored in real‐time. Therefore, the DMSSS of this work opens up promising prospects for applications in sign language pose recognition, non‐contact sensing, human‐computer interaction, and electronic skin.

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Section: Resultsmentioning

confidence: 99%

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Guo

Hong

Zhao

et al. 2022

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“…During the fabrication of flexible sensors, VO 2 films were prone to breakage during transfer to the flexible substrate, resulting in the reduction of sensor performance. To our knowledge, the preparation of conductive patterns directly on flexible substrates by direct writing will significantly reduce the breakage rate of VO 2 films, thus improving the performance of flexible sensors and significantly promoting the application of semiconductor materials in flexible sensors. , …”

Section: Introductionmentioning

confidence: 99%

“…To our knowledge, the preparation of conductive patterns directly on flexible substrates by direct writing will significantly reduce the breakage rate of VO 2 films, thus improving the performance of flexible sensors and significantly promoting the application of semiconductor materials in flexible sensors. 36,37 Here, VO 2 (B) nanobelts with the width ranging from 100 to 200 nm were prepared by the hydrothermal method and then mixed with polymers to make VO 2 (B) conductive ink, which was patterned on various flexible substrates through traditional Chinese calligraphy and hard-pen calligraphy. The conductive pathway composed of VO 2 (B) and LA133 achieved a dual response to the temperature and strain.…”

Section: Introductionmentioning

confidence: 99%

Flexible Strain Sensors Based on Direct-Writing VO₂ Nanobelts Inks for Monitoring Human Motions and Human–Machine Interaction

Han,

Cheng,

Fang

et al. 2023

ACS Appl. Nano Mater.

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Flexible strain sensors have attracted extensive attention due to their promising applications in wearable electronics and artificial intelligence, and VO 2 smart materials have been applied in this field due to their sole stimuli-response. In addition, the direct writing method is very facile for the preparation of flexible sensors. Herein, the VO 2 (B) nanobelts with the width ranging from 100 to 200 nm were synthesized by the hydrothermal method in this work. Subsequently, VO 2 (B)-based flexible sensors were prepared via the direct-writing strategy, where the conductive ink containing synthesized VO 2 (B) powders was patterned on the different substrates by pen or brush. The sensors exhibited high sensitivity (GF = 470) and excellent stability (stretch−release cycles more than 1000) and can accurately monitor varieties of human health signals (respiration, pulse, muscle state, etc.). As-prepared smart integrated glove associating with LEDs and power supply can effectively achieve gesture recognition and a primary human−computer interaction model. Furthermore, the sensing signals of joint movements were collected by VO 2 (B)-based flexible sensors and then remotely transmitted to the smart terminal through a wireless local-area network, which achieved real-time monitoring of human movement. Therefore, this work demonstrated the potential application of a VO 2 (B)-based conductive ink in wearable electronic devices and human−computer interaction systems.

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“…Embedding the nanostructured sensing materials with near zero temperature coefficient of resistance (TCR) into traditional polymer substrates is an alternative strategy to obtain low-temperature strain sensors with high sensitivity and noninterference feature to temperature. [40][41][42][43] The flexible strain sensor constructed by compounding graphene (G) with a negative TCR and silver nanowires (Ag NWs) with a positive TCR into the PDMS matrix possessed a very high gauge factor GF (9156) and ideal resistance to temperature interference over a wide temperature range of −40 to 20 °C. [41] Similarly, based on the silver nanoparticle (Ag NP) film that was modulated with organic and halide ligands, the wearable strain sensor delivered a very low TCR value of 1.9 × 10 −5 , making it highly insensitive to temperature changes.…”

Section: Introductionmentioning

confidence: 99%

3D Printing Assisted‐Fabrication of Low‐Temperature Strain Sensors with Large Working Range and Outstanding Stability

Niu,

He,

Chen

et al. 2023

Adv Materials Technologies

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Recently, low‐temperature wearable strain sensors, referring to those working at sub‐zero temperatures, are attracting increasing attentions. However, the fabrication of low‐temperature strain sensors with large working ranges, high sensitivity, and good stability remains a major challenge. In this study, a novel low‐temperature wearable strain sensor is fabricated by depositing the silver nanoplates (Ag NPs)/carbon nanotubes (CNTs) composite onto a cured silicone (DS) substrate that is constructed by using a 3D printing technology. The synergistic effect of the Ag NPs with positive temperature coefficient of resistance (TCR) and the CNTs with negative TCR enable the Ag NPs/CNTs/DS strain sensor's TCR value (−1.16 × 10−5 K−1) to approach zero. The Ag NPs/CNTs/DS strain sensor demonstrates a high gauge factor over a large working range (0–100%) and fast response and recovery rates. Simultaneously, the Ag NPs/CNTs/DS strain sensor displays outstanding reproducibility and long‐term stability at −40 °C as well as excellent temperature cycling resistance under cyclic temperature of −40 to 60 °C. The Ag NPs/CNTs/DS strain sensor is further validated by incorporating into a wireless sensing system for remotely monitoring various human activities at −40 °C. This work provides wearable strain sensors for monitoring human‐machine interaction under low‐temperature condition.

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Direct ink writing of a graphene/CNT/silicone composite strain sensor with a near-zero temperature coefficient of resistance

Abstract: Developing wearable strain sensors with zero temperature coefficient of resistance (TCR), which is crucial to overcome the problem of temperature disturbance, has been scarcely studied. Herein, highly stretchable graphene nanoplatelet...

Cited by 42 publications

References 47 publications

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Flexible Strain Sensors Based on Direct-Writing VO₂ Nanobelts Inks for Monitoring Human Motions and Human–Machine Interaction

3D Printing Assisted‐Fabrication of Low‐Temperature Strain Sensors with Large Working Range and Outstanding Stability

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Direct ink writing of a graphene/CNT/silicone composite strain sensor with a near-zero temperature coefficient of resistance

Abstract: Developing wearable strain sensors with zero temperature coefficient of resistance (TCR), which is crucial to overcome the problem of temperature disturbance, has been scarcely studied. Herein, highly stretchable graphene nanoplatelet...

Cited by 42 publications

References 47 publications

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Bioinspired Dual‐Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination

Flexible Strain Sensors Based on Direct-Writing VO2 Nanobelts Inks for Monitoring Human Motions and Human–Machine Interaction

3D Printing Assisted‐Fabrication of Low‐Temperature Strain Sensors with Large Working Range and Outstanding Stability

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Flexible Strain Sensors Based on Direct-Writing VO₂ Nanobelts Inks for Monitoring Human Motions and Human–Machine Interaction