M13 Bacteriophage-Assisted Morphological Engineering of Crack-Based Sensors for Highly Sensitive and Wide Linear Range Strain Sensing

Kim, Kang-Hyun; Nguyen, Thanh Mien; Ha, Sung‐Hun; Choi, Eun Jung; Kim, Yeji; Kim, Won‐Geun; Oh, Jin‐Woo; Kim, Jong-Man

doi:10.1021/acsami.0c13307

Cited by 21 publications

(11 citation statements)

References 43 publications

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“…Cycling performance was also evaluated, as shown in Figure 2g, a ≈270 cycle-sensor conditioning was observed, which is common for strain sensors. [48,54,55] The average level of peak ΔR/R 0 tends to be generally stable in the next 800 cycles. Certain fluctuations of the peak resistance change were observed, which may arise from cracking process and polymer substrate issue (Note 2, Supporting Information).…”

Section: The Overall Sensor Performancementioning

confidence: 99%

Nacre‐Inspired, Liquid Metal‐Based Ultrasensitive Electronic Skin by Spatially Regulated Cracking Strategy

Feng

Jiang

Zou

et al. 2021

Adv Funct Materials

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The realization of liquid metal-based wearable systems will be a milestone toward high-performance, integrated electronic skin. However, despite the revolutionary progress achieved in many other components of electronic skin, liquid metal-based flexible sensors still suffer from poor sensitivity due to the insufficient resistance change of liquid metal to deformation. Herein, a nacreinspired architecture composed of a biphasic pattern (liquid metal with Cr/Cu underlayer) as "bricks" and strain-sensitive Ag film as "mortar" is developed, which breaks the long-standing sensitivity bottleneck of liquid metal-based electronic skin. With 2 orders of magnitude of sensitivity amplification while maintaining wide (>85%) working range, for the first time, liquid metal-based strain sensors rival the state-of-art counterparts. This liquid metal composite features spatially regulated cracking behavior. On the one hand, hard Cr cells locally modulate the strain distribution, which avoids premature cut-through cracks and prolongs the defect propagation in the adjacent Ag film. On the other hand, the separated liquid metal cells prevent unfavorable continuous liquid-metal paths and create crack-free regions during strain. Demonstrated in diverse scenarios, the proposed design concept may spark more applications of ultrasensitive liquid metal-based electronic skins, and reveals a pathway for sensor development via crack engineering.

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Section: The Overall Sensor Performancementioning

confidence: 99%

Nacre‐Inspired, Liquid Metal‐Based Ultrasensitive Electronic Skin by Spatially Regulated Cracking Strategy

Feng

Jiang

Zou

et al. 2021

Adv Funct Materials

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“…[20,21] Conventional crack-based strain sensors typically consist of an elastomeric substrate to provide stretchability and a brittle conductive layer to generate cracks. [22][23][24][25] The constructed cracks in the brittle conductive layer cause a significant change in the resistance of the sensor. The generation of cracks in the conductive network improves the sensitivity of the sensor but unpredictable cracks evolution reduces the sensing range.…”

Section: Introductionmentioning

confidence: 99%

Serpentine‐Inspired Strain Sensor with Predictable Cracks for Remote Bio‐Mechanical Signal Monitoring

Ren

Zhu

et al. 2022

Macromol. Rapid Commun.

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Flexible strain sensors have attracted intense interest due to their application as intelligent wearable electronic devices. However, it is still a huge challenge to achieve a flexible sensor with simultaneous high sensitivity, excellent durability, and a wide sensing region. In this work, a crack-based strain sensor with a paired-serpentine conductive network is fabricated onto flexible film by screen printing. The innovative conductive network exhibits a controlled crack morphology during stretching, which endows the prepared sensor with outstanding sensing characteristics, including high sensitivity (gauge factor up to 2391.5), wide detection (rang up to 132%), low strain detection limit, a fast response time (about 40 ms), as well as excellent durability (more than 2000 stretching/releasing cycles). Benefiting from these excellent performances, full-range human body motions including subtle physiological signals and large motions are accurately detected by the prepared sensor. Furthermore, wearable electronic equipment integrated with a wireless transmitter and the prepared strain sensor shows great potential for remote motion monitoring and intelligent mobile diagnosis for humans. This work provides an effective strategy for the fabrication of novel strain sensors with highly comprehensive performance.

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“…Combining the conductive materials (metallic nanoparticles/nanowires, graphene, carbon nanotubes (CNTs), carbon black (CB)) with polymer matrix (Ecoflex, poly(dimethylsiloxane) (PDMS), polyurethane (PU)) to form nanocomposite structures is one of the favorable methods to prepare flexible strain sensors. ,− The conductive materials play critical roles in determining the sensing performance. , Carbon fiber material, a type carbon-based nanomaterial, possessing the merits of good conductivity, high flexibility, and excellent stability, is a kind of desirable sensing material in flexible electronics. ,, Soaking, coating, spinning, and chemical vapor deposition (CVD) have been widely used to prepare conductive carbon fiber materials for flexible strain sensors . For example, Yin et al reported a flexible strain sensor based on reduced graphene oxide woven fabrics through the dip-coating method.…”

Section: Introductionmentioning

confidence: 99%

Stretchable Strain Sensors Based on Two- and Three-Dimensional Carbonized Cotton Fabrics for the Detection of Full Range of Human Motions

Shen

Liang

et al. 2021

ACS Appl. Electron. Mater.

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Recently, flexible strain/pressure sensors have made rapid development under the stimulus of the demand for wearable electronics. Those based on carbonized fabrics have attracted great attention by virtue of their outstanding sensing performance, facile fabrication, and low cost. However, it is still challenging for a stretchable sensor to achieve both a wide sensing range and high sensitivity up to now. Therefore, stretchable strain sensors based on carbonized cotton fabrics (CFs) with two-and three-dimensional (2D and 3D) structures are designed utilizing a simple one-step carbonization process, realizing the complementary performance requirement for sensitivity and working range. The 2D sensor based on a planar structure shows a high gauge factor (GF) of 24.12 within a stretching range of 50−100%, while the 3D sensor based on a helical structure exhibits a linear response within a broad strain range of 0−180%. Furthermore, both sensors have been demonstrated to have excellent stability, low detection limit, and good reliability and are also successfully applied to detect small physical stimuli and large joint motions. It is believed that our sensors have great potential in wearable devices for the detection of the full range of human activities.

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M13 Bacteriophage-Assisted Morphological Engineering of Crack-Based Sensors for Highly Sensitive and Wide Linear Range Strain Sensing

Cited by 21 publications

References 43 publications

Nacre‐Inspired, Liquid Metal‐Based Ultrasensitive Electronic Skin by Spatially Regulated Cracking Strategy

Nacre‐Inspired, Liquid Metal‐Based Ultrasensitive Electronic Skin by Spatially Regulated Cracking Strategy

Serpentine‐Inspired Strain Sensor with Predictable Cracks for Remote Bio‐Mechanical Signal Monitoring

Stretchable Strain Sensors Based on Two- and Three-Dimensional Carbonized Cotton Fabrics for the Detection of Full Range of Human Motions

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