Highly Stretchable, Highly Sensitive, and Antibacterial Electrospun Nanofiber Strain Sensors with Low Detection Limit and Stable CNT/MXene/CNT Sandwich Conductive Layers for Human Motion Detection

He, Jingqiang; Zou, Xiaoling; Wang, Weijie; Chen, Meimei; Jiang, Shun-Yuan; Cui, Ce; Tang, Hong; Li, Yang; Guo, Ronghui

doi:10.1021/acs.iecr.3c00905

Cited by 10 publications

(3 citation statements)

References 57 publications

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“…The sensitivity of the bilayer sensor is directly influenced by the MXene loading, suggesting an optimal selection for the target strain to boost the resistance changes. Compared with reported MXene/CNT nanocomposite strain sensors, our devices demonstrate competitive sensitivities and working ranges, as shown in Table S1, ,,,− illustrating the advantage of the bilayer design to achieve optimal performances.…”

Section: Resultsmentioning

confidence: 76%

Stretchable MXene/Carbon Nanotube Bilayer Strain Sensors with Tunable Sensitivity and Working Ranges

Yang,

Huang,

Lin

et al. 2024

ACS Appl. Mater. Interfaces

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Stretchable strain sensors have gained increasing popularity as wearable devices to convert mechanical deformation of the human body into electrical signals. Two-dimensional transition metal carbides (Ti3C2T x MXene) are promising candidates to achieve excellent sensitivity. However, MXene films have been limited in operating strain ranges due to rapid crack propagation during stretching. In this regard, this study reports MXene/carbon nanotube bilayer films with tunable sensitivity and working ranges. The device is fabricated using a scalable process involving spray deposition of well-dispersed nanomaterial inks. The bilayer sensor’s high sensitivity is attributed to the cracks that form in the MXene film, while the compliant carbon nanotube layer extends the working range by maintaining conductive pathways. Moreover, the response of the sensor is easily controlled by tuning the MXene loading, achieving a gauge factor of 9039 within 15% strain at 1.92 mg/cm2 and a gauge factor of 1443 within 108% strain at 0.55 mg/cm2. These tailored properties can precisely match the operation requirements during the wearable application, providing accurate monitoring of various body movements and physiological activities. Additionally, a smart glove with multiple integrated strain sensors is demonstrated as a human–machine interface for the real-time recognition of hand gestures based on a machine-learning algorithm. The design strategy presented here provides a convenient avenue to modulate strain sensors for targeted applications.

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Section: Resultsmentioning

confidence: 76%

Stretchable MXene/Carbon Nanotube Bilayer Strain Sensors with Tunable Sensitivity and Working Ranges

Yang,

Huang,

Lin

et al. 2024

ACS Appl. Mater. Interfaces

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“…These sensors are applied in real-time movement detection in amyotrophic lateral sclerosis patients, writing encryption, and human–machine information transfer [ 162 ]. Electrospun nanofiber strain sensors with a Ti 3 C 2 T x -based conductive interlayer demonstrate remarkable performance in gesture language recognition [ 163 ]. Moreover, multifunctional, robust, flexible knitted strain sensors composed of conductive Ti 3 C 2 T x nanosheets serve as intelligent sensing gloves for accessible communication among individuals with impaired hearing [ 164 ].…”

Section: Application Of Ti 3 C 2 ...mentioning

confidence: 99%

Research Progress on Ti3C2Tx-Based Composite Materials in Antibacterial Field

Chen,

Wang,

Chen

et al. 2024

Molecules

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The integration of two-dimensional Ti3C2Tx nanosheets and other materials offers broader application options in the antibacterial field. Ti3C2Tx-based composites demonstrate synergistic physical, chemical, and photodynamic antibacterial activity. In this review, we aim to explore the potential of Ti3C2Tx-based composites in the fabrication of an antibiotic-free antibacterial agent with a focus on their systematic classification, manufacturing technology, and application potential. We investigate various components of Ti3C2Tx-based composites, such as metals, metal oxides, metal sulfides, organic frameworks, photosensitizers, etc. We also summarize the fabrication techniques used for preparing Ti3C2Tx-based composites, including solution mixing, chemical synthesis, layer-by-layer self-assembly, electrostatic assembly, and three-dimensional (3D) printing. The most recent developments in antibacterial application are also thoroughly discussed, with special attention to the medical, water treatment, food preservation, flexible textile, and industrial sectors. Ultimately, the future directions and opportunities are delineated, underscoring the focus of further research, such as elucidating microscopic mechanisms, achieving a balance between biocompatibility and antibacterial efficiency, and investigating effective, eco-friendly synthesis techniques combined with intelligent technology. A survey of the literature provides a comprehensive overview of the state-of-the-art developments in Ti3C2Tx-based composites and their potential applications in various fields. This comprehensive review covers the variety, preparation methods, and applications of Ti3C2Tx-based composites, drawing upon a total of 171 English-language references. Notably, 155 of these references are from the past five years, indicating significant recent progress and interest in this research area.

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“…Sun et al developed a novel strain sensor by combining double-layer micropatterned Au and SWCNTs to achieve a strain sensor with a GF as high as 3.4 × 10 6 under 100% strain [ 27 ]. He et al successfully fabricated a sandwich structure consisting of a sensing layer composed of CNTs and MXene on a flexible thermoplastic polyurethane substrate [ 34 ]. The strain sensor exhibits exceptional sensing range (390%) and sensitivity (GF = 2159.5).…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive and ultrastretchable metal crack strain sensor based on helical polydimethylsiloxane

Chen,

Liu,

Chen

et al. 2024

Beilstein J. Nanotechnol.

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The majority of crack sensors do not offer simultaneously both a significant stretchability and an ultrahigh sensitivity. In this study, we present a straightforward and cost-effective approach to fabricate metal crack sensors that exhibit exceptional performance in terms of ultrahigh sensitivity and ultrahigh stretchability. This is achieved by incorporating a helical structure into the substrate through a modeling process and, subsequently, depositing a thin film of gold onto the polydimethylsiloxane substrate via sputter deposition. The metal thin film is then pre-stretched to generate microcracks. The sensor demonstrates a remarkable stretchability of 300%, an exceptional sensitivity with a maximum gauge factor reaching 107, a rapid response time of 158 ms, minimal hysteresis, and outstanding durability. These impressive attributes are attributed to the deliberate design of geometric structures and careful selection of connection types for the sensing materials, thereby presenting a novel approach to fabricating stretchable and highly sensitive crack-strain sensors. This work offers a universal platform for constructing strain sensors with both high sensitivity and stretchability, showing a far-reaching significance and influence for developing next-generation practically applicable soft electronics.

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Highly Stretchable, Highly Sensitive, and Antibacterial Electrospun Nanofiber Strain Sensors with Low Detection Limit and Stable CNT/MXene/CNT Sandwich Conductive Layers for Human Motion Detection

Cited by 10 publications

References 57 publications

Stretchable MXene/Carbon Nanotube Bilayer Strain Sensors with Tunable Sensitivity and Working Ranges

Stretchable MXene/Carbon Nanotube Bilayer Strain Sensors with Tunable Sensitivity and Working Ranges

Research Progress on Ti3C2Tx-Based Composite Materials in Antibacterial Field

Ultrasensitive and ultrastretchable metal crack strain sensor based on helical polydimethylsiloxane

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