Neuromorphic properties of flexible carbon nanotube/polydimethylsiloxane nanocomposites

Liu, Ruochen; Kim, Jae Gwang; Dhakal, Prashant; Li, Wei; Ma, Jun; Hou, Aolin; Merkel, Cory; Qiu, Jingjing; Zoran, Mark J.; Wang, Shiren

doi:10.1007/s42114-022-00599-9

Cited by 38 publications

(17 citation statements)

References 46 publications

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“…The introduced reversible dynamic interactions such as hydrogen bondings, Diels–Alder bonds, boronate ester bonds, and metal–ligand coordination bonds provide a reliable method for the design of self-healing elastomer-based sensors. − Elastomers with excellent mechanical properties are always cross-linked through strong bonds that can increase the molecular network rigidity, but their self-healing ability is always seriously limited . Moreover, embedding carbonaceous nanomaterials − or metallic nanomaterials can improve the mechanical properties of elastomers. − For instance, the tensile strength of an elastomer was enhanced by 100% by adding 21.1% MXene and 2.9% multiwall carbon nanotubes (MWCNT) . However, these elastomers lack a self-healing ability.…”

Section: Introductionmentioning

confidence: 99%

Self-healable and Robust Silicone Elastomer for Ultrasensitive Flexible Sensors

Liu

Zou

et al. 2023

ACS Sustainable Chem. Eng.

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Capturing human motions using wearable electronics provides tremendous opportunities for human–machine interfaces. However, current flexible sensors are always challenged due to the contradiction between the self-healing property and mechanical performance of the flexible matrix. Moreover, the strain sensing range of current sensors is always limited within 5% due to the ineffectiveness of conductive components upon larger strain. Inspired by the synergistic combination of hydrogen bondings and metal coordination, a self-healable elastomer was synthesized, which displayed a tensile strength of 1.73 MPa and a self-healing efficiency of 93%. Moreover, the designed flexible sensor using a synthesized silicone elastomer substrate and a carbon nanotube conductive component displayed a high gauge factor of 1198 contributed by the cooperation of the wrinkle structure and the microcrack mechanism. The flexible sensors exhibited a fast response of 129 ms due to the excellent adhesion of the conductive layer upon the substrate. Furthermore, a wearable intelligent gesture capturing system integrating an elastomer-based sensor and a wireless electronic control module was successfully developed to realize the real-time monitoring of hand gestures. Thus, the developed silicone elastomer-based sensor holds high potential for human–machine interfaces and provides a novel pathway for hand rehabilitation training.

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Section: Introductionmentioning

confidence: 99%

Self-healable and Robust Silicone Elastomer for Ultrasensitive Flexible Sensors

Liu

Zou

et al. 2023

ACS Sustainable Chem. Eng.

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“…Among them, TPU is simply electrostatically spun into fibrous membranes, that exhibit excellent tensile properties, flexibility, and mechanical strength [58,59] . As a kind of emerging nanomaterials, CNTs are also widely used in many fields [60][61][62][63][64] . Selecting suitable materials to prepare various sensors has become the research focus of scholars at home and abroad [65][66][67][68][69][70][71] .…”

Section: Introductionmentioning

confidence: 99%

Flexible Strain Sensor Enabled by Carbon Nanotubes‐Decorated Electrospun TPU Membrane for Human Motion Monitoring

Weng

et al. 2023

Adv Materials Inter

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“…The development of superhydrophobic flexible pressure sensors has received a lot of attention recently. − Wang et al combined fluorinated poly(dimethylsiloxane) with multi-walled carbon nanotubes (MWCNTs) to produce a superhydrophobic strain sensor, which retained superhydrophobicity after 1000% stretching, 10000 stretch cycles, hand-rub, tape-peeling, and high-speed water impact . Poly(dimethylsiloxane) (PDMS) exhibits apparent advantages in fabricating superhydrophobic functional materials due to the high wear resistance and low surface energy. − The superhydrophobic flexible pressure sensor is prepared using PDMS as a binder to enhance the adhesion between hydrophobic materials and substrates. , For instance, Hu et al adopted spray coating to prepare a CB conducting layer atop a PDMS flexible layer, leading to a strain sensor with relatively high GF (up to 67.2), and high tensile strain (up to 100%) . However, developing superhydrophobic pressure sensors with flexibility, high sensitivity, exceptional reliability, durability, and suitability for underwater human motion signal monitoring remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

“…50−52 The superhydrophobic flexible pressure sensor is prepared using PDMS as a binder to enhance the adhesion between hydrophobic materials and substrates. 53,54 For instance, Hu et al adopted spray coating to prepare a CB conducting layer atop a PDMS flexible layer, leading to a strain sensor with relatively high GF (up to 67.2), and high tensile strain (up to 100%). 55 However, developing superhydrophobic pressure sensors with flexibility, high sensitivity, exceptional reliability, durability, and suitability for underwater human motion signal monitoring remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Pressure Sensors Using PPy/MWCNTs/PDMS@Melamine Foam for Human Motion Detection on Land and Underwater

Zhou

Chen

et al. 2023

ACS Appl. Electron. Mater.

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Flexible pressure sensors with high sensitivity and outstanding mechanical reliability are crucial for human motion detection. In this work, we fabricated a flexible pressure sensor with a bilayer conductive structure using PDMS/MWCNTs@polypyrrol@melamine foam (PMPM). Typically, the construction of extra conductive routes is facilitated by a porous structure to achieve a high sensitivity of 117.61 kPa–1 for pressure in a low detection limit and constant gauge factor (GF) of 6.39 over a linear compression strain range. Furthermore, the polypyrrole particles covering the surface of melamine foam could enhance electron transfer and spatial deformation. And such hierarchical structures can form highly interconnected conductive networks, providing sensitive sensing behavior for a pressure range from 0 to 100 kPa and a strain range from 0 to 60%. Moreover, the PMPM sensor presents superhydrophobicity (CA > 150°) and excellent reliability (∼1200 cycles). The PMPM sensors show good sensing performance in detecting typical human movements, such as bending of joints. The motion detection of human motion underwater without encapsulation is also realized. This work may provide an innovative scheme for accessing the next generation of health and sports monitoring electronics.

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Neuromorphic properties of flexible carbon nanotube/polydimethylsiloxane nanocomposites

Cited by 38 publications

References 46 publications

Self-healable and Robust Silicone Elastomer for Ultrasensitive Flexible Sensors

Self-healable and Robust Silicone Elastomer for Ultrasensitive Flexible Sensors

Flexible Strain Sensor Enabled by Carbon Nanotubes‐Decorated Electrospun TPU Membrane for Human Motion Monitoring

High-Sensitivity Pressure Sensors Using PPy/MWCNTs/PDMS@Melamine Foam for Human Motion Detection on Land and Underwater

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