Pressure Sensors: A Sensitive and Biodegradable Pressure Sensor Array for Cardiovascular Monitoring (Adv. Mater. 43/2015)

Boutry, Clémentine M.; Nguyen, Amanda; Lawal, Qudus Omotayo; Chortos, Alex; Bao, Zhenan

doi:10.1002/adma.201570294

Cited by 13 publications

(10 citation statements)

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“…An ultrawide working range of 400 kPa has been achieved by Sharma et al and 1000 kPa by Chen et al, but the sensitivity did not exceed 1 kPa –1 at a low-pressure level and dropped quickly to about 10 –3 kPa –1 at a high-pressure level. With sensitivity greater than 10 kPa –1 , the best of those studies showed a working range up to 360 kPa, ,− ,− while our MDM iontronic capacitive pressure sensor achieved a sensitively linear working range from 0.013 to 2063 kPa. To the best of our knowledge, this has been the widest linear working range up to date.…”

Section: Resultsmentioning

confidence: 86%

Multilayer Double-Sided Microstructured Flexible Iontronic Pressure Sensor with a Record-wide Linear Working Range

Xiao

Duan

et al. 2021

ACS Sens.

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Wearable electronics, electronic skins, and human–machine interfaces demand flexible sensors with not only high sensitivity but also a wide linear working range. The latter remains a great challenge and has become a big hurdle for some of the key advancements imperative to these fields. Here, we present a flexible capacitive pressure sensor with ultrabroad linear working range and high sensitivity. The dielectric layer of the sensor is composed of multiple layers of double-sided microstructured ionic gel films. The multilayered structure and the gaps between adjacent films with random topography and size enhance the compressibility of the sensor and distribute the stress evenly to each layer, enabling a linear working range from 0.013 to 2063 kPa. Also, the densely distributed protrusive microstructures in the electric double layer contribute to a sensitivity of 9.17 kPa–1 for the entire linear working range. For the first time, a highly sensitive pressure sensor that can measure loading conditions across 6 orders of magnitude is demonstrated. With the consistent and stable performance from a low- to high-measurement range, the proposed pressure sensor can be used in many applications without the need for recalibration to suit different loading scenarios.

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Section: Resultsmentioning

confidence: 86%

Multilayer Double-Sided Microstructured Flexible Iontronic Pressure Sensor with a Record-wide Linear Working Range

Xiao

Duan

et al. 2021

ACS Sens.

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“…Cardiovascular diseases (CVDs) have been the top killer in the world and continuous monitoring of artery pulse, which is associated with hypertension, is of vital importance for the diagnosis and prevention of CVDs. , Therefore, in recent years, a lot of attention has been drawn to measure artery pulse objectively and automatically by wearable sensors with the advantages of high sensitivity, extreme thinness, ultralight weight, high flexibility, low cost, and great convenience. ,,,, In the following section, the proposed sensor was demonstrated in real-time human radial and carotid pulse measurements, followed by the evaluation of artery stiffness. Figure a,b exhibits human pulse waves of the radial artery and carotid artery measured by the magnetic-assisted piezoresistive sensor adhered to the neck of human and wrapped around the wrist in real-time.…”

Section: Resultsmentioning

confidence: 99%

“…Flexible electronics, especially pressure sensor, is an emerging area in recent years and has attracted wide interests for the vast promising applications, such as flexible display, soft robotics, human motion monitoring, electronic skins (e-skin), and health care. − Just like the mechanoreceptors of human skins, with the capability of real-time tracking physiological signals, including temperature, , pressure, ,− strain, ,− humidity, etc, flexible sensors are crucial components in e-skin. High sensitivity, optical transparency, fast response, and long-term stability are all essential for high-performance pressure sensors of wearable electronics.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-Assisted Transparent and Flexible Percolative Composite for Highly Sensitive Piezoresistive Sensor via Hot Embossing Technology

Wang

Chen

Niu

et al. 2019

ACS Appl. Mater. Interfaces

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A highly transparent and flexible percolative composite with magnetic reduced graphene oxide@nickel nanowire (mGN) fillers in EcoFlex matrix is proposed as a sensing layer to fabricate high-performance flexible piezoresistive sensors. Large excluded volume and alignment of mGN fillers contribute to low percolation threshold (0.27 vol %) of mGN-EcoFlex composites, leading to high electrical conductivity of 0.003 S m–1, optical transmittance of 71.8%, and low Young’s modulus of 122.8 kPa. Large-scale microdome templates for sensors are prepared by hot embossing technology cost-effectively and COMSOL Multiphysics is utilized to optimize the sensor performances. Piezoresistive sensors fabricated experimentally show superior average sensitivity of 1302.1 kPa–1 with a low device-to-device variation of 3.74%, which provides a new way to achieve transparent, highly sensitive, and large-scale electronic skin.

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“…The sensitivities were calculated according to the definition function as the slope of the straight line obtained via linear fitting to Δ I / I 0 versus the pressure curve (Figure S2). Because of the nonlinearity, the Δ I / I 0 versus pressure curve was separated into two segments as reported in previous works. ,, Herein, the sensitivities were recorded as S 1 and S 2 in the two segments. The boundaries of the pressure ranges were constant at 2.76 kPa with regard to the surface pattern of SPNMs (Figure a) and the boundaries of S 1 and S 2 were 2.76, 1.63, and 1.63 kPa when the volume fractions of Ag NWs were 3.8, 5.6 and 7.4%, respectively (Figure b).…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Wearable Pressure Sensors Assembled by Surface-Patterned Polyolefin Elastomer Nanofiber Membrane Interpenetrated with Silver Nanowires

Zhong

Liu

Liu³

et al. 2018

ACS Appl. Mater. Interfaces

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Wearable pressure sensors with ultrahigh sensitivity and flexibility have garnered tremendous attention because of their abilities to mimic the human somatosensory system and perceive surrounding pressure distribution. Herein, an ultrasensitive pressure sensor was fabricated with surface-patterned nanofibrous membranes (SPNMs) via a facile replica method from available plain-weaved nylon textiles. The SPNMs were composed of internal threedimensional interpenetrating polyolefin elastomer nanofibers and silver nanowires (Ag NWs). The effects of the geometry of surface patterns and the density of the Ag NW network on the sensing performance of the assembled pressure sensor were systematically investigated. The results indicated that clavate groove-shaped surface patterns improved the sensitivity and a larger groove spacing contributed to higher sensitivities, whereas denser Ag NWs would reduce the sensing performance. The optimal pressure sensor assembled with SPNMs-45 and a Ag NW fraction of 3.8% showed high sensitivity (19.4 kPa −1 ) below the pressure of 2.76 kPa, a low detection limit (<1.6 Pa), fast response (30 and 42 ms), as well as excellent durability. These outstanding performances demonstrated its promising potential for wearable electronic applications, like detecting the spatial pressure distribution and monitoring human muscle motions.

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Pressure Sensors: A Sensitive and Biodegradable Pressure Sensor Array for Cardiovascular Monitoring (Adv. Mater. 43/2015)

Cited by 13 publications

References 0 publications

Multilayer Double-Sided Microstructured Flexible Iontronic Pressure Sensor with a Record-wide Linear Working Range

Multilayer Double-Sided Microstructured Flexible Iontronic Pressure Sensor with a Record-wide Linear Working Range

Magnetic-Assisted Transparent and Flexible Percolative Composite for Highly Sensitive Piezoresistive Sensor via Hot Embossing Technology

Ultrasensitive Wearable Pressure Sensors Assembled by Surface-Patterned Polyolefin Elastomer Nanofiber Membrane Interpenetrated with Silver Nanowires

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