Highly sensitive, reliable and flexible piezoresistive pressure sensors featuring polyurethane sponge coated with MXene sheets

Li, Xiaopeng; Li, Yue; Song, Dekui; Peng, Min; Hu, C. J.; Zhang, Haobin; Koratkar, Nikhil; Yu, Zhong‐Zhen

doi:10.1016/j.jcis.2019.01.123

Cited by 293 publications

(165 citation statements)

References 57 publications

Supporting

Mentioning

162

Contrasting

Order By: Relevance

“…The MXene film is obtained by vacuum filtration using MXene nanosheet solution, the XRD of MXene film is shown in Figure S1c (Supporting Information) and the result is consistent with the reported XRD of exfoliated Ti 3 C 2 T x . [30] The steps of preparing the MXSD is shown in Figure S2a (Supporting Information). The MXene film is sandwiched between two layers of the substrate made of polydimethylsiloxane (PDMS).…”

Section: Fabrication and Characterizationmentioning

confidence: 99%

Deep‐Learning‐Enabled MXene‐Based Artificial Throat: Toward Sound Detection and Speech Recognition

Jin

Wen

et al. 2020

Adv Materials Technologies

View full text Add to dashboard Cite

Wearable sound detectors require strain sensors that are stretchable, sensitive, and capable of adhering conformably to the skin, and toward this end, 2D materials hold great promise. However, the vibration of vocal cords and muscle contraction are complex and changeable, which can compromise the sensing performance of devices. By combining deep learning and 2D MXenes, an MXene‐based sound detector is prepared successfully with improved recognition and sensitive response to pressure and vibration, which facilitate the production of a high‐recognition and resolution sound detector. By training and testing the deep learning network model with large amounts of data obtained by the MXene‐based sound detector, the long vowels and short vowels of human pronunciation are successfully recognized. The proposed scheme accelerates the application of artificial throat devices in biomedical fields and opens up practical applications in voice control, motion monitoring, and many other fields.

show abstract

Section: Fabrication and Characterizationmentioning

confidence: 99%

Deep‐Learning‐Enabled MXene‐Based Artificial Throat: Toward Sound Detection and Speech Recognition

Jin

Wen

et al. 2020

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…[ 9 ] Numerous interesting nanomaterials and smart structures have been designed with a view to outstanding performance in a broad range. These designs include a network of percolative nanomaterial blocks, [ 87 ] interlocked mechanisms, [ 93 ] porous networks, [ 94–96 ] conductively coated micro/nanofibers, [ 97 ] and other patterns. [ 98,99 ] For example, Figure A shows the sea urchin‐shaped microparticles (SUSM) with a forest of nanostructured spines.…”

Section: Resistive Stretchable Sensorsmentioning

confidence: 99%

Advances in Rational Design and Materials of High‐Performance Stretchable Electromechanical Sensors

Dinh

Nguyen

Phan

et al. 2020

Small

View full text Add to dashboard Cite

curved surfaces and deformed objects. [5,6] An effective solution is using stretchable intrinsic materials and stretchable structural designs to form mechanical sensors. [7,8] Compared to conventional rigid sensors, it is desirable for stretchable sensors to provide mechanical robustness, biocomparability, multifunctionality, as well as comfort of wearing such sensors. [9,10] Stretchable electromechanical sensors are capable of being comfortably attached on the human body and skin and perceiving mechanical stimuli. These sensors have huge potential applications in personal healthcare, including detection of human motion/gesture, breath, and pulse monitoring. Stretchable electromechanical sensors have recently attracted great interest due to their high sensitivity, stretchability, simplicity in design, and implementation. Compared with the other kinds of sensors, for example, stretchable piezoelectric/triboelectric sensors, electromechanical sensors usually require supply power or battery.A stretchable sensor typically consists of a sensing block embedded or integrated into a stretchable substrate that can be elongated under application of mechanical stimuli. [11,12] The sensing block acts as a mechanical sensing unit, which for instance converts stress/strain into a measurable electrical signal. The presence of nanomaterials and composites in the sensing block has been utilized as a preferable design for stretchable sensors. [11,13] Selection criteria of these materials include structural stretchability, suitable conductivity, and high mechanical strength. Designing the sensing structure aims for high sensitivity, fast response, linearity, and a wide working range. [14,15] The integration of nanomaterials and nanocomposites into stretchable sensors are currently an emerging trend of wearable sensors in their research, development, and commercialization. [10,11] The development of stretchable sensors with low power consumption for portable applications is also of great interest. [16,17] The conventional design method for "partly stretchable" sensing devices integrates "hard" sensors and "soft" interconnects to form "island-interconnect" configurations. [18,19] This approach deploys an isolated island to carry the rigid sensors and a stretchable network of interconnections. Geometric engineering structures including serpentine and fractal designs have been widely employed, to achieve stretchability Stretchable and wearable sensor technology has attracted significant interests and created high technological impact on portable healthcare and smart human-machine interfaces. Wearable electromechanical systems are an important part of this technology that has recently witnessed tremendous progress toward high-performance devices for commercialization. Over the past few years, great attention has been paid to simultaneously enhance the sensitivity and stretchability of the electromechanical sensors toward high sensitivity, ultra-stretchability, low power consumption or selfpower functionalities, miniaturisation as well a...

show abstract

“…The GF in the pressure range of 0-5.37 and 5.37-18.56 kPa is 147 and 442, respectively. Li X.-P. et al (2019) used the same method to load MXenes lamellae onto the skeleton of a polyurethane (PU) sponge treated with chitosan. Because chitosan is positively charged and the MXenes lamellae surface is negatively charged, MXenes lamellae can be evenly and tightly adsorbed on the sponge.…”

Section: Pressure Sensormentioning

confidence: 99%

MXenes and Their Applications in Wearable Sensors

et al. 2020

View full text Add to dashboard Cite

MXenes, a kind of two-dimensional material of early transition metal carbides and carbonitrides, have emerged as a unique class of layered-structured metallic materials with attractive features, as good conductivity comparable to metals, enhanced ionic conductivity, hydrophilic property derived from their hydroxyl or oxygen-terminated surfaces, and mechanical flexibility. With tunable etching methods, the morphology of MXenes can be effectively controlled to form nanoparticles, single layer, or multi-layer nanosheets, which exhibit large specific surface areas and is favorable for enhancing the sensing performance of MXenes based sensors. Moreover, MXenes are available to form composites with other materials facilely. With structure design, MXenes or its composite show enhanced mechanical flexibility and stretchability, which enabled its wide application in the fields of wearable sensors, energy storage, and electromagnetic shielding. In this review, recent progress in MXenes is summarized, focusing on its application in wearable sensors including pressure/strain sensing, biochemical sensing, temperature, and gas sensing. Furthermore, the main challenges and future research are also discussed.

show abstract

Highly sensitive, reliable and flexible piezoresistive pressure sensors featuring polyurethane sponge coated with MXene sheets

Cited by 293 publications

References 57 publications

Deep‐Learning‐Enabled MXene‐Based Artificial Throat: Toward Sound Detection and Speech Recognition

Deep‐Learning‐Enabled MXene‐Based Artificial Throat: Toward Sound Detection and Speech Recognition

Advances in Rational Design and Materials of High‐Performance Stretchable Electromechanical Sensors

MXenes and Their Applications in Wearable Sensors

Contact Info

Product

Resources

About