Double layer carbon-nanoparticle-based flexible pressure sensor with high precision and stability

Yang, Xin; Cao, Zimei; Chen, Yan; Wu, Di; Qiu, Xianbo; Yu, Duli; Guo, Xiaoliang

doi:10.1016/j.eml.2020.100715

Cited by 18 publications

(8 citation statements)

References 39 publications

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“…It is revealed that the curve of each cycle is almost the same (insets in Figure ), suggesting that the 150PS1MX6 sensor has excellent stability. In comparison with other relative pressure sensors (Table S2), − this sensor combines several advantages, such as comparable sensitivity, a wide sensing pressure range, and great stability.…”

Section: Results and Discussionmentioning

confidence: 99%

Free-Standing, Flexible Carbon@MXene Films with Cross-Linked Mesoporous Structures toward Supercapacitors and Pressure Sensors

Bai

Wang

Xue

et al. 2021

ACS Appl. Mater. Interfaces

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The preparation of multifunctional materials with low cost and simple synthesis processes is still challenging. Herein, by employing various sizes (50–500 nm) of polystyrene (PS) spheres as templates, different free-standing carbon@MXene films with three-dimensional (3D) mesoporous structures were fabricated through a simple multistep route. The microstructure, composition, mechanical property, conductivity, electrochemical activity, and sensing characteristics of these carbon@MXene films were investigated in detail. The intercalation of the PS spheres can effectively reduce the self-accumulation of MXene nanosheets and construct 3D cross-linked mesoporous structures, therefore broadening the ion transport channels and exposing more active sites of carbon@MXene films. When applied in a symmetrical supercapacitor, the optimized carbon@MXene electrode has a satisfactory specific capacitance of 447.67 F g–1 at a current density of 1 A g–1. Moreover, the 3D mesoporous structures of carbon@MXene films can significantly improve the sensitivity of the resultant pressure sensors with excellent stability (10,000 cycles). Thus, such mesoporous carbon@MXene films prepared by a facile yet robust route will be a versatile material for many applications.

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Section: Results and Discussionmentioning

confidence: 99%

Free-Standing, Flexible Carbon@MXene Films with Cross-Linked Mesoporous Structures toward Supercapacitors and Pressure Sensors

Bai

Wang

Xue

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…Percussion wave (P wave), tidal wave (T wave), and diastolic wave (D wave) represent systolic and diastolic blood pressure, ventricular pressure and heart rate, which is consistent with the results detected in other pressure sensor related work. [60,61] After comparison, the waveform after exercise shows diverse characteristics, including the enhanced P wave and the insignificant T wave, which may be attributed to changes in the heart. The pulse information and waveform results obtained by the above sensors are consistent with the current pulse interpretation, indicating that the tactile sensor in this work can realize the detection of weak pulse signals.…”

Section: Application Of the Sensormentioning

confidence: 99%

Highly Reliable Sensitive Capacitive Tactile Sensor with Spontaneous Micron‐Pyramid Structures for Electronic Skins

Zhao

et al. 2022

Macro Materials & Eng

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In recent years, it is still challenging to develop a capacitive tactile sensor with low cost, high sensitivity, and controllable morphology. Herein, the flexible capacitive pressure sensor (FCPS) with high sensitivity is fabricated via a one-step template method to produce spontaneous micron-pyramid structured polydimethylsiloxane (PDMS) by releasing a four-way stretched PDMS film treated with ultraviolet ozone exposure. The capacitive sensor is composed of two silver nanowire electrodes coated on polyimide substrate and a patterned PDMS dielectric layer sandwiching in the middle, exhibits an ultrahigh sensitivity of 15.66 kPa −1 , an ultralow limit of detection of 0.2 Pa, a fast response time of 42.4 ms, and excellent cycling stability. The finite-elemental analysis suggests that the uniform micro-pyramid structures are vital to obtain ultrahigh sensitivity, low detection limit, and fast response. In particular, the FCPS can keep the tactile performance unchanged after 4000 repeated tests, reflecting the high robustness. In conclusion, the significant advantages of the sensor enable it to be well applied in the fields of sign language detection, spatial pressure distribution, and physiological signal monitoring, indicating that FCPS has a potential application prospect in the fields of flexible wearable electronic devices and electronic skins.

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“…[1][2][3] Among various types of pressure sensors, that is, capacitive, [4] piezoresistive, [5,6] piezoelectric, [7] and triboelectric, [8,9] the wearable piezoresistive sensors made great progress toward practical application, which benefits from its low cost, facile fabrication, abundant raw materials, excellent sensing performance, simple integration, etc. [10,11] Meanwhile, new requirements for wearable piezoresistive sensors are put forward, such as sensing precision [12] and stability, [13,14] multifunctional performance, [15] wearing comfort, [16][17][18][19] and so on.…”

Section: Doi: 101002/admi202201528mentioning

confidence: 99%

A Flexible, Highly Accurate, and Stable Pressure Sensor with Anti‐Interference from Temperature, Sweat, and Humidity

Liu

Yang

et al. 2022

Adv Materials Inter

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The highly accurate and stable pressure sensors with anti‐interference from varying sensing environments (temperature and humidity) are essential and a challenge in practical applications. However, real‐time electrical resistance fluctuation or even sensing inaccuracy are widely existed due to the sensibility of conductive materials towards varying temperatures, humidity, and sweat circumstance. Here, for the first time, the hydrophobic, non‐fluoride, titanium dioxide nanoparticle (TiO2‐ODI) modified carbon nanotube (CNT)/carbon black (CB) pressure sensors are introduced to achieve anti‐interference from temperature, droplets, and humidity. The sensors with a near‐zero temperature coefficient of resistance (near‐ZTC) effect (≈ −10 to 70 °C). The anti‐interference from moisture benefits from the effective isolation effect of the hydrophobic TiO2‐ODI layer. Meanwhile, the TiO2‐ODI/CNT/CB pressure sensors obtain a favorable sensitivity of 1.57 kPa−1, a fast response time of 20 ms, a negligible hysteresis ratio of 1.9%, prominent air permeability, and a facile scalable strategy. Hence, the TiO2‐ODI/CNT/CB pressure sensors are feasible for accurately and stably sensing under varying sensing environments by efficiently suppressing interferences from varying temperatures, high humidity, and sweat.

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Double layer carbon-nanoparticle-based flexible pressure sensor with high precision and stability

Cited by 18 publications

References 39 publications

Free-Standing, Flexible Carbon@MXene Films with Cross-Linked Mesoporous Structures toward Supercapacitors and Pressure Sensors

Free-Standing, Flexible Carbon@MXene Films with Cross-Linked Mesoporous Structures toward Supercapacitors and Pressure Sensors

Highly Reliable Sensitive Capacitive Tactile Sensor with Spontaneous Micron‐Pyramid Structures for Electronic Skins

A Flexible, Highly Accurate, and Stable Pressure Sensor with Anti‐Interference from Temperature, Sweat, and Humidity

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