Gum Sensor: A Stretchable, Wearable, and Foldable Sensor Based on Carbon Nanotube/Chewing Gum Membrane

Darabi, Mohammad Ali; Khosrozadeh, Ali; Wang, Q.; Xing, Malcolm

doi:10.1021/acsami.5b08276

Cited by 87 publications

(67 citation statements)

References 44 publications

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“…Moreover, their electrical resistance almost completely recovered upon release of tensile strain in each cycle (Figure 4b). The ionogel nanocomposite-based strain sensor demonstrates high GF with the largest deformation compared with previously reported stretchable strain sensors (Figure 4c), [28,[37][38][39][40][41][42][43][44][45][46][47][48] and its sensitivity is also much higher than many of the reported results such as strain sensors based on typical metal (≈2 at 5% strain), [38,49] ionic conductor (0.348 ± 0.11 at 700% strain), [44] and hydrogel (1.51 at 1000% strain). [28] The results demonstrate that our ionogel nanocomposite-based strain sensor is capable of measuring strain from 1% to 1400% with high stretching sensitivity, whether it was assembled by original or self-healed sample.…”

Section: All These Merits Are Achieved Mainly Due To the Integration mentioning

confidence: 72%

Self‐Healing, Adhesive, and Highly Stretchable Ionogel as a Strain Sensor for Extremely Large Deformation

Zhang

Cheng

et al. 2019

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Fabricating a strain sensor that can detect large deformation over a curved object with a high sensitivity is crucial in wearable electronics, human/machine interfaces, and soft robotics. Herein, an ionogel nanocomposite is presented for this purpose. Tuning the composition of the ionogel nanocomposites allows the attainment of the best features, such as excellent self‐healing (>95% healing efficiency), strong adhesion (347.3 N m−1), high stretchability (2000%), and more than ten times change in resistance under stretching. Furthermore, the ionogel nanocomposite–based sensor exhibits good reliability and excellent durability after 500 cycles, as well as a large gauge factor of 20 when it is stretched under a strain of 800–1400%. Moreover, the nanocomposite can self‐heal under arduous conditions, such as a temperature as low as −20 °C and a temperature as high as 60 °C. All these merits are achieved mainly due to the integration of dynamic metal coordination bonds inside a loosely cross‐linked network of ionogel nanocomposite doped with Fe3O4 nanoparticles.

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Section: All These Merits Are Achieved Mainly Due To the Integration mentioning

confidence: 72%

Self‐Healing, Adhesive, and Highly Stretchable Ionogel as a Strain Sensor for Extremely Large Deformation

Zhang

Cheng

et al. 2019

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“…[10,12,13,[15][16][17][18][19][20] Recently, many attempts have been made to address this conflict and achieve a large stretchability (>100%) and high gauge factor (>20) simultaneously in a single sensor platform. [21][22][23][24][25][26][27] The unique architectures of CNTs, with their aligned wavy bundles [21] and highly oriented fibers, [22] have the potential to enhance the sensing performance by appropriately modulating the contact area between the CNTs upon stretching. The piezoresistive responses of strain sensors based on elastomeric composites with conductive nanofillers (e.g., CNTs, CBs, mNWs, mNPs, and graphene) are highly dependent on the shape of the nanofillers.…”

Section: Doi: 101002/smll201704232mentioning

confidence: 99%

Highly Sensitive and Stretchable Resistive Strain Sensors Based on Microstructured Metal Nanowire/Elastomer Composite Films

Kim

Jang

et al. 2018

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High sensitivity and high stretchability are two conflicting characteristics that are difficult to achieve simultaneously in elastic strain sensors. A highly sensitive and stretchable strain sensor comprising a microstructured metal nanowire (mNW)/elastomer composite film is presented. The surface structure is easily prepared by combining an mNW coating and soft-lithographic replication processes in a simple and reproducible manner. The densely packed microprism-array architecture of the composite film leads to a large morphological change in the mNW percolation network by efficiently concentrating the strain in the valley regions upon stretching. Meanwhile, the percolation network comprising mNWs with a high aspect ratio is stable enough to prevent electrical failure, even under high strains. This enables the sensor to simultaneously satisfy high sensitivity (gauge factor ≈81 at >130% strain) and high stretchability (150%) while ensuring long-term reliability (10 000 cycles at 150% strain). The sensor can also detect strain induced by bending and pressure, thus demonstrating its potential as a versatile sensing tool. The sensor is successfully utilized to monitor a wide range of human motions in real time. Furthermore, the unique sensing mechanism is easily extended to detect more complex multiaxial strains by optimizing the surface morphology of the device.

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“…Wearable and skin-mountable sensors need to comply with stringent requirements with regard to flexibility, robustness, stretchability, lightness, and biocompatibility. For these reasons, various flexible strain/pressure sensors have been recently developed using metal nanoparticles [3,4], nanowires [5][6][7], and low-dimensional carbon materials [8,9].…”

Section: Introductionmentioning

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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Gum Sensor: A Stretchable, Wearable, and Foldable Sensor Based on Carbon Nanotube/Chewing Gum Membrane

Cited by 87 publications

References 44 publications

Self‐Healing, Adhesive, and Highly Stretchable Ionogel as a Strain Sensor for Extremely Large Deformation

Self‐Healing, Adhesive, and Highly Stretchable Ionogel as a Strain Sensor for Extremely Large Deformation

Highly Sensitive and Stretchable Resistive Strain Sensors Based on Microstructured Metal Nanowire/Elastomer Composite Films

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

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