A superhydrophobic and anti-corrosion strain sensor for robust underwater applications

Dai, Zhenhong; Ding, Sen; Lei, Ming; Li, Shunbo; Xu, Yuheng; Zhou, Yin‐Ning; Zhou, Boyu

doi:10.1039/d1ta04259a

Cited by 74 publications

(52 citation statements)

References 36 publications

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“…The superhydrophobic surface with low adhesion and strong water repellency can leverage the rolling of the water droplets to remove particles from the surface for self-cleaning) (Figure 4a). [27,117,124,[130][131][132][133] Though washing can partially remove certain contaminations, the PDMS film placed in a dusty environment still shows dramatically decreased transmissivity (Figure 4b-Ι), [88] the contaminated PDMS interlayer in the TENG results in a decrease in electrical output to 51% of its initial value (Figure 4b-II). [87] Compared to the common PDMS, cleaning the contaminated superhydrophobic PDMS leads to a higher transmissivity (Figure 4b-III), and the one in the TENG allows the device to achieve 88% of its initial electrical output (Figure 4b-IV).…”

Section: Self-cleanmentioning

confidence: 99%

Surface Wettability for Skin‐Interfaced Sensors and Devices

Wang

Liu

Cheng

et al. 2022

Adv Funct Materials

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The practical applications of skin-interfaced sensors and devices in daily life hinge on the rational design of surface wettability to maintain device integrity and achieve improved sensing performance under complex hydrated conditions. Various bioinspired strategies have been implemented to engineer desired surface wettability for varying hydrated conditions. Although the bodily fluids can negatively affect the device performance, they also provide a rich reservoir of health-relevant information and sustained energy for next-generation stretchable self-powered devices. As a result, the design and manipulation of the surface wettability are critical to effectively control the liquid behavior on the device surface for enhanced performance. The sensors and devices with engineered surface wettability can collect and analyze health biomarkers while being minimally affected by bodily fluids or ambient humid environments. The energy harvesters also benefit from surface wettability design to achieve enhanced performance for powering on-body electronics. This review first summarizes the commonly used approaches to tune the surface wettability for target applications toward skin-interfaced sensors and devices. By considering the existing challenges, one also discusses the opportunities as a small fraction of potential future developments, which can lead to a new class of skin-interfaced devices for use in digital health and personalized medicine.

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Section: Self-cleanmentioning

confidence: 99%

Surface Wettability for Skin‐Interfaced Sensors and Devices

Wang

Liu

Cheng

et al. 2022

Adv Funct Materials

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“…Additionally, increasing attention has been paid to the waterproof properties of strain sensors. 2,54–58 In previously reported strain sensors, the investigation of the waterproof properties of strain sensors has been mainly focused on characterization of the water repellency ( e.g. , water contact angle).…”

Section: Introductionmentioning

confidence: 99%

“…, water contact angle). 2,54–56 Only a few recently reported strain sensors 57,58 have demonstrated underwater sensing performances ( e.g. , underwater joint motion detection), whereas few strain sensors have been applied to demonstrate underwater dynamic strain-sensing performances (especially when high-frequency dynamic stimuli are involved) which is mainly obstructed by the limited response rate.…”

Section: Introductionmentioning

confidence: 99%

“…2,[54][55][56][57][58] In previously reported strain sensors, the investigation of the waterproof properties of strain sensors has been mainly focused on characterization of the water repellency (e.g., water contact angle). 2,[54][55][56] Only a few recently reported strain sensors 57,58 have demonstrated underwater sensing performances (e.g., underwater joint motion detection), whereas few strain sensors have been applied to demonstrate underwater dynamic strainsensing performances (especially when high-frequency dynamic stimuli are involved) which is mainly obstructed by the limited response rate. Thus, the development of ultrafast dynamic responses of strain sensors with outstanding comprehensive performances is still a great challenge (Table S1, ESI †).…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast dynamic response of waterproof stretchable strain sensors based on wrinkle-templated microcracking

Zheng

Liu

et al. 2022

J. Mater. Chem. A

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“…Therefore, it is imperative to develop intrinsically drying- and freezing-resistant hydrogels to accommodate various application scenarios and different environmental conditions. For instance, a strain sensor needs to operate in a wet or underwater environment for some application scenarios, such as swimmer’s electrocardiogram detection, , a diver’s motion monitoring, − underwater robot sensing systems, and underwater disturbance detection . Note that traditional hydrogels easily absorb water and swell because of their high hydrophilicity, which is not suitable for underwater sensing applications, whereas surface hydrophobic hydrogels are rarely reported.…”

mentioning

confidence: 99%

Hydrophobic and Stable Graphene-Modified Organohydrogel Based Sensitive, Stretchable, and Self-Healable Strain Sensors for Human-Motion Detection in Various Scenarios

Huang

et al. 2022

ACS Materials Lett.

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Developing stretchable/wearable strain sensors in different application scenarios is a global demand for creating a smart society and promoting healthcare, whereas existing hydrogel-based strain sensors suffer from limited sensitivity, low conductance and hydrophilicity, making them difficult to operate underwater. In this work, a highly sensitive, stretchable, and hydrophobic strain sensor is fabricated by coating a layer of reduced graphene oxide (rGO) sheets on the surface of organohydrogel. Furthermore, a facile solvent-replacement approach is utilized to enhance the anti-freezing and anti-drying abilities of hydrogel simultaneously by incorporating propanediol in the solvent. Consequently, the obtained rGO-organohydrogel composite strain sensor features a high gauge factor of 140, a low detection limit of 0.1% strain, a wide detection range (0–400% strain), a fast response time of 190 ms, excellent stability and repeatability, and high hydrophobicity (contact angle of 122°), making it applicable for a wide range of application scenarios, such as the real-time and continuous monitoring of various human motions in extremely cold (−60 °C), dry, and underwater environments. The sensitivity of an rGO-modified organohydrogel strain sensor is more than 30 times higher than that of its unmodified counterpart, which is attributed to the cracking and tunneling effects introduced by the highly conductive rGO surface layer upon stretching.

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A superhydrophobic and anti-corrosion strain sensor for robust underwater applications

Abstract: Exploration of wearable strain sensors for diverse application scenarios is one global mainstream for shaping the future of our intelligent community. However, state-of-the-art wearable devices still face the challenges such...

Cited by 74 publications

References 36 publications

Surface Wettability for Skin‐Interfaced Sensors and Devices

Surface Wettability for Skin‐Interfaced Sensors and Devices

Ultrafast dynamic response of waterproof stretchable strain sensors based on wrinkle-templated microcracking

Hydrophobic and Stable Graphene-Modified Organohydrogel Based Sensitive, Stretchable, and Self-Healable Strain Sensors for Human-Motion Detection in Various Scenarios

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