A Novel Linear Capacitive Temperature Sensor Using Polydimethylsiloxane

Salmaz, Uzma; Islam, Tarikul; Sohail, Shiraz

doi:10.1109/tim.2020.2986120

Cited by 22 publications

(7 citation statements)

References 24 publications

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“…It is worth noting that the capacitive sensor in MCES exhibited low sensitivity to pressure and temperature during strain detection, where the capacitance showed low sensitivity by pressure due to parallel thin plate mode (Figure S1b). 55 In addition, the capacitance change was negligible when heating stress (from room temperature to ∼80 °C) was applied, where only the dielectric constant of the PDMS would decrease 56 with temperature to slightly affect the capacitance (Figure S1c). In addition, as depicted in Figure 2b, the MCES exhibited superior repeatability at 10, 20, 30, 40, 60, and 80% strains during the cyclic stretch/release process.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Stretchable, Adhesive, and Bioinspired Visual Electronic Skin with Strain/Temperature/Pressure Multimodal Non-Interference Sensing

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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It is highly desirable to construct a single-multimodal sensor that could synchronously perceive multiple stimuli without interference. Here, we propose an adhesive multifunctional chromotropic electronic skin (MCES) that can respond to and distinguish three different stimuli of stain, temperature, and pressure within the two-terminal sensing unit. The mutually discriminating "three-in-one" device converts strain into capacitance and pressure into voltage signals for a tactile stimulus response and produces visual color changes against temperature. In this MCES system, the interdigital capacitor sensor shows high linearity (R 2 = 0.998), and temperature sensing is realized via reversible multicolor switching bioinspired by the chameleon, showing attractive potential in visualization interaction. Notably, the energy-harvesting triboelectric nanogenerator in MCES can not only detect pressure incentive but also identify objective material species. Looking forward, these findings promise for multimodal sensor technology with reduced complexity and production costs that are highly anticipated in soft robotics, prosthetics, and human−machine interaction applications.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Stretchable, Adhesive, and Bioinspired Visual Electronic Skin with Strain/Temperature/Pressure Multimodal Non-Interference Sensing

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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“…Sensing at low temperature environment [ 52,73] (≤0 °C) Sensing at high temperature environment [ 50,51,54,[73][74][75] (≥100 °C) Repeatability Wide temperature range…”

Section: Temperature Sensorsmentioning

confidence: 99%

“…Recently, to further improve the sensitivity of capacitive pressure sensors, the dielectric material in middle layer of the sensor have been replaced by ionic gel-based materials to form electric double layer (EDL) capacitance, becoming supercapacitive sensors with ultrahigh sensitivity. [48,49] Capacitive temperature sensors [50][51][52][53][54] exhibit great potential to be applied in anti-icing systems, [55] body temperature measurement, and hightemperature chemical reaction monitoring. In recent, to improve the sensing performance of temperature sensor, ionic material is used to improve the performance of temperature sensor, [56,57] and the structure like kirigami was introduced, [58] contributing toward the enhancement of sensitivity and stretchability.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Capacitive Sensors: Materials, Microstructure Designs, Applications, and Opportunities

Cheng

Sha

et al. 2023

Adv Materials Technologies

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Capacitive sensors have advanced rapidly to create new applications including wearable sensors for human health monitoring, integrated sensors for intelligent surgical devices, tactile interfaces for robots. Compared to other types of pressure or strain sensors, capacitive sensors require low power consumption and offer excellent linearity and fast response time. Herein, this review concentrates on the recent advancements and developments of high‐performance capacitive sensors with new materials and microstructures, which significantly enhance their sensitivity, accuracy, linearity, and response time. This work also provides a review of recent applications, from which current challenges and future opportunities are proposed and discussed.

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“…It should be noted that temperature fluctuations can also cause capacitive changes due to the thermal expansion of the PDMS. [8,[34][35][36] Therefore, when deformation and temperature signals simultaneously change, we can evaluate them through the corresponding resistance and capacitance of the sensor.…”

Section: The Decoupling Mechanism Of the Dual-parameter X-t Sensormentioning

confidence: 99%

Liquid‐Metal‐Based Stretchable Dual‐Parameter Sensor for Simultaneous Detection of Deformation and Temperature

Zhang

et al. 2022

Adv Materials Technologies

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Multiparameter sensors that can individually monitor mechanical and thermal signals from multiple stimuli have attracted immense attention. Due to interferences caused by signal crosstalk, it is a challenge for multiparameter sensors to simultaneously differentiate mechanic and thermal stimuli within a broad working range. Herein, a liquid‐metal‐based stretchable dual‐parameter sensor that can simultaneously detect deformation (0–4.5 mm) and temperature (0–60 °C) is fabricated. The sensor adopts a multilayer structure in which a capacitive deformation‐sensing unit is stacked on top of a resistive temperature‐sensing unit. The deformation unit possesses excellent linear responses (R2 = 0.999) and ultralow detection limit (0.04 mm, ≈0.02%). Attributed to these merits, the deformation unit can be used to monitor physiological actions (e.g., finger bending, swallowing, and speaking). The temperature unit exhibits strong stability under multiple stimuli. With the cooperation of the two units, the dual‐parameter sensor can accurately differentiate deformation and temperature stimuli with an average error of 0.04 mm and 0.82 °C. Because of these remarkable performances, the sensor can achieve real‐time acquisition of the deformation and temperature change during finger movements. The dual‐parameter sensing abilities of the sensor indicate its promising potential in human motion monitoring and wearable devices.

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A Novel Linear Capacitive Temperature Sensor Using Polydimethylsiloxane

Cited by 22 publications

References 24 publications

Stretchable, Adhesive, and Bioinspired Visual Electronic Skin with Strain/Temperature/Pressure Multimodal Non-Interference Sensing

Stretchable, Adhesive, and Bioinspired Visual Electronic Skin with Strain/Temperature/Pressure Multimodal Non-Interference Sensing

Recent Advances of Capacitive Sensors: Materials, Microstructure Designs, Applications, and Opportunities

Liquid‐Metal‐Based Stretchable Dual‐Parameter Sensor for Simultaneous Detection of Deformation and Temperature

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