Correction: Corrigendum: Hydrogel microphones for stealthy underwater listening

Gao, Yang; Song, Jingfeng; Li, Shumin; Elowsky, Christian; Zhou, Yi; Ducharme, Stephen; Chen, Yong Mei; Zhou, Qin; Tan, Li

doi:10.1038/ncomms13114

Cited by 5 publications

(2 citation statements)

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“…The adhesion strength underwater was in a range of 10–20 kPa (Movie S1). Though the obtained value is about half of that in air, it is strong enough to get adhered to various substrates and has promising applications underwater, such as underwater sensors or microphones. − …”

Section: Resultsmentioning

confidence: 99%

Multiple Weak H-Bonds Lead to Highly Sensitive, Stretchable, Self-Adhesive, and Self-Healing Ionic Sensors

Qiao

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

284

193

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Herein, we demonstrate a ternary ionic hydrogel sensor consisting of tannic acid, sodium alginate, and covalent cross-linked polyacrylamide as skin-mountable and wearable sensors. Based on the multiple weak H-bonds and synergistic effects between the three components, the as-prepared hybrid hydrogel exhibits ultrastretchability with high elasticity, good self-healing, excellent conformability, and high self-adhesiveness to diverse substrates both in air and underwater. More importantly, the ternary hydrogel exhibits high strain sensitivity especially under subtle strains with a gauge factor of 2.0, which is close to the theoretical value of the ionic hydrogel sensors; an extremely large workable range of strain (0.05–2100%); and a low operating voltage 0.07 V. Consequently, the sensor demonstrates superior sensing performance for real-time monitoring of the large and subtle human motions, including limb motions, swallowing, smiling, and wrist pulse. Therefore, it is believed that the STP hydrogel has great potential applications in health monitoring, smart wearable devices, and soft robots.

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Section: Resultsmentioning

confidence: 99%

Multiple Weak H-Bonds Lead to Highly Sensitive, Stretchable, Self-Adhesive, and Self-Healing Ionic Sensors

Qiao

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

284

193

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show abstract

“…Hydrogels are the typical soft materials, by virtue of their great potentials in applications spanning from soft robotics, sensors, actuators to tissue engineering (Wegst et al, 2014;Iwaso et al, 2016;Kim et al, 2016;Banerjee et al, 2018;Dong et al, 2018;Hu et al, 2019). Nevertheless, conventional hydrogels are considered to be mechanically weak due to lack of an effective energy dissipation mechanism or intrinsic structural heterogeneity (Dhivya et al, 2015;Yuk et al, 2016), limiting utilization in some fields that require excellent mechanical properties (Gao et al, 2016;Fan et al, 2019;Lai et al, 2019). Therefore, improving mechanical properties of hydrogels became an important research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Physical Organohydrogels With Extreme Strength and Temperature Tolerance

et al. 2020

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Tough gel with extreme temperature tolerance is a class of soft materials having potential applications in the specific fields that require excellent integrated properties under subzero temperature. Herein, physically crosslinked Europium (Eu)-alginate/polyvinyl alcohol (PVA) organohydrogels that do not freeze at far below 0 • C, while retention of high stress and stretchability is demonstrated. These organohydrogels are synthesized through displacement of water swollen in polymer networks of hydrogel to cryoprotectants (e.g., ethylene glycol, glycerol, and d-sorbitol). The organohydrogels swollen water-cryoprotectant binary systems can be recovered to their original shapes when be bent, folded and even twisted after being cooled down to a temperature as low as −20 and −45 • C, due to lower vapor pressure and ice-inhibition of cryoprotectants. The physical organohydrogels exhibit the maximum stress (5.62 ± 0.41 MPa) and strain (7.63 ± 0.02), which is about 10 and 2 times of their original hydrogel, due to the synergistic effect of multiple hydrogen bonds, coordination bonds and dense polymer networks. Based on these features, such physically crosslinked organohydrogels with extreme toughness and wide temperature tolerance is a promising soft material expanding the applications of gels in more specific and harsh conditions.

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Skin‐Inspired Double‐Hydrophobic‐Coating Encapsulated Hydrogels with Enhanced Water Retention Capacity

Zhu

Jiang

Wang

et al. 2021

Adv Funct Materials

126

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Traditional hydrogels always lose their flexibility and functions in dry environments because the internal water inevitably undergoes evaporation. In this study, a skin-inspired, facile, and versatile strategy for developing encapsulated hydrogels with excellent water retention capacity through a double-hydrophobic coating is proposed. The robust double-layer coating, which integrates a hydrophobic polymer coating with a hydrophobic oil layer simultaneously, can provide a barrier to prevent the evaporation of water. To overcome the weak interfacial strength between the hydrophilic hydrogel surface and the double-hydrophobic coating, (3-aminopropyl) triethoxysilane (APTES) is utilized as a chemical binding agent. Furthermore, the overall mechanical properties of the bulk hydrogel are not significantly affected, because the coating is only anchored to the surface and its thickness is much lower than that of the native hydrogel. Moreover, it is demonstrated that this proposed strategy particularly holds the capability of encapsulating various types and different shapes of hydrogels, leading to enhanced stability and a prolonged lifetime in air. Therefore, the proposed technology provides new insights for multifarious surface functionalization of hydrogel and broadens the range of hydrogel applications.

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Correction: Corrigendum: Hydrogel microphones for stealthy underwater listening

Cited by 5 publications

References 0 publications

Multiple Weak H-Bonds Lead to Highly Sensitive, Stretchable, Self-Adhesive, and Self-Healing Ionic Sensors

Multiple Weak H-Bonds Lead to Highly Sensitive, Stretchable, Self-Adhesive, and Self-Healing Ionic Sensors

Physical Organohydrogels With Extreme Strength and Temperature Tolerance

Skin‐Inspired Double‐Hydrophobic‐Coating Encapsulated Hydrogels with Enhanced Water Retention Capacity

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