Compressible and robust PANI sponge anchored with erected MXene flakes for human motion detection

Chang, Kangqi; Li, Le; Zhang, Chao; Ma, Piming; Dong, Weifu; Huang, Yunpeng; Liu, Tianxi

doi:10.1016/j.compositesa.2021.106671

Cited by 42 publications

(35 citation statements)

References 34 publications

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“…The major challenge of MXene synthesis is still related to etching rather than intercalation and delamination. These flexible and conductive MXene nanosheets can homogeneously disperse in a variety of solutions, 95,96 and assemble into freestanding films, 35,97 flexible fibers, 98,99 compressible sponges, 100,101 and vertical arrays. 102,103 MXene flakes have additional functionalities, for example, superconductivity, by making good use of their surface chemistry.…”

Section: Methods Classification Mxene Types Etchant Referencesmentioning

confidence: 99%

Flexible MXene films for batteries and beyond

Huang

et al. 2022

Carbon Energy

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MXenes add dozens of metallic conductors to the family of two‐dimensional (2D) materials. A top‐down synthesis approach removing A‐layer atoms (e.g., Al, Si, and Ga) in MAX phases to produce 2D flakes attaches various surface terminations to MXenes. With these terminations, MXenes show tunable properties, promising a range of applications from energy storage devices to electronics, including sensors, transistors, and antennas. MXenes are also excellent building blocks to create flexible films used for flexible and wearable devices. This article summarizes the synthesis of MXene flakes and highlights aspects that need attention for flexible devices. Rather than listing the development of energy storage devices in detail, we focus on the main challenges of and solutions for constructing high‐performance devices. Moreover, we show the applications of MXene films in electronics to call on designs to construct a complete system based on MXene with good flexibility, which consists of a power source, sensors, transistors, and wireless communications.

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Section: Methods Classification Mxene Types Etchant Referencesmentioning

confidence: 99%

Flexible MXene films for batteries and beyond

Huang

et al. 2022

Carbon Energy

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“…When the external pressure is under 2 kPa, an ultrahigh sensitivity of up to 26.65 kPa –1 can be realized, whereas under a higher pressure exertion (over 2 kPa), the sensitivity is still maintained at around 3.07 kPa –1 , exhibiting a much higher sensitivity compared to other MXene based pressure sensors (Figure S11). ,− The main reason for such a decrease in sensitivity with the increasing external pressure lies in the microstructural changes of the sensitive material. When the loaded pressure is low, the successful construction of numerous new conductive networks leads to a significant reduction in R c .…”

Section: Resultsmentioning

confidence: 99%

3D MXene/PEDOT:PSS Composite Aerogel with a Controllable Patterning Property for Highly Sensitive Wearable Physical Monitoring and Robotic Tactile Sensing

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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MXene based composite conductive aerogels have been extensively investigated as sensitive materials for wearable pressure sensors owing to their effective 3D network microstructures and the excellent conductivity of MXene. In this work, we fabricated a 3D porous Ti3C2T x MXene/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) composite aerogel (MPCA) with a controllable patterning property utilizing the Cu-assisted electrogelation method. The prepared composite aerogel can be assembled into pressure sensors for wearable physical monitoring and high-resolution sensor microarrays for robotic tactile sensing. The multi-interactions between MXene and PEDOT:PSS enable the MPCA to have a stable 3D conductive network, which consequently enhances both the mechanical flexibility and the piezoresistive property of the MPCA. Thus, the fabricated pressure sensor demonstrating high sensitivity (26.65 kPa–1 within 0–2 kPa), fast response ability (106 ms), and excellent stability can be further applied for wearable physical monitoring. Moreover, due to the controllable patterning property of the electrogelation preparation method, a high-resolution pressure sensor microarray was successfully prepared as an artificial tactile interface, which can be attached to a robotic fingertip to directly recognize the tactile stimuli from human fingers and identify braille letters like human fingers. The proposed MPCA, endowed with a remarkable comprehensive property, particularly the highly sensitive sensing performance and controllable patterning property, demonstrates an enormous advantage and a great potentiality toward wearable electronics.

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“…Yet conventional wearable devices are usually made up of rigid, brittle, and hermetical matrixes that cannot realize the intimate contact with human skin nor satisfy long-term wearing comfort. Fortunately, elastic microfibers/textiles with porous networks, high specific area, and a low Young’s modulus perfectly meet the requirements to develop comfortable and conformable wearing electronics. − Additionally, visualized stretchable electronics with human-readable visual optical signals have attracted considerable research interest due to the highly efficient human–machine dialogue in solid-state lighting, displays, and biomedicine. − So far, the reported visualized electronic skins are mainly focused on electroluminescence , and mechanoluminescence . Nevertheless, the development of the mechano-/electro-induced luminescent devices ineluctably implicates complicated preparation processes, high cost, and an external power supply (e.g., electroluminescent devices require voltage higher than 1 kV) .…”

Section: Design Of the Janus E-textilementioning

confidence: 99%

Perspiration-Wicking and Luminescent On-Skin Electronics Based on Ultrastretchable Janus E-Textiles

et al. 2022

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Stretchable electronics have attracted surging attention for next-generation smart wearables, yet traditional flexible devices fabricated on hermetical elastic substrates cannot satisfy lengthy wearing comfort and signal stability due to their poor moisture and air permeability. Herein, perspiration-wicking and luminescent on-skin electrodes are fabricated on superelastic nonwoven textiles with a Janus configuration. Through the electrospin-assisted face-to-face assembly of all-SEBS microfibers with differentiated diameters and composition, porosity and wettability asymmetry are constructed across the textile, endowing it with antigravity water transport capability for continuous sweat release. Also, the phosphor particles evenly encapsulated in the elastic fibers empower the Janus textile with stable light-emitting capability under extreme stretching in a dark environment. Additionally, the precise printing of highly conductive liquid metal (LM) circuits onto the matrix not only equips the electronic textile with broad detectability for various biophysical and electrophysiological signals but also enables successful implementation of human–machine interface (HMIs) to control a mechanical claw.

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Compressible and robust PANI sponge anchored with erected MXene flakes for human motion detection

Cited by 42 publications

References 34 publications

Flexible MXene films for batteries and beyond

Flexible MXene films for batteries and beyond

3D MXene/PEDOT:PSS Composite Aerogel with a Controllable Patterning Property for Highly Sensitive Wearable Physical Monitoring and Robotic Tactile Sensing

Perspiration-Wicking and Luminescent On-Skin Electronics Based on Ultrastretchable Janus E-Textiles

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