Tailoring the Temperature Coefficient of Resistance of Silver Nanowire Nanocomposites and their Application as Stretchable Temperature Sensors

Cui, Zheng; Poblete, Felipe R.; Zhu, Yong

doi:10.1021/acsami.9b04045

Cited by 142 publications

(135 citation statements)

References 35 publications

(50 reference statements)

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“…A comparison between our printed sensor and recently reported temperature sensors were made from the five aspects which were firmly related to practical application: the sensitivity, response time and recovery time, humidity stability, completed circuit, and fabrication method, as shown in Table 1 15,19,20,37,49,50 . It unambiguously indicated the superior comprehensive performance of our printed sensor.…”

Section: Resultsmentioning

confidence: 99%

Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring

Wang

Sekine

Takeda

et al. 2020

Sci Rep

206

183

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, takeo Shiba, takao nishikawa & Shizuo tokito * facile fabrication and high ambient stability are strongly desired for the practical application of temperautre sensor in real-time wearable healthcare. Herein, a fully printed flexible temperature sensor based on cross-linked poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was developed. By introducing the crosslinker of (3-glycidyloxypropyl)trimethoxysilane (GOPS) and the fluorinated polymer passivation (CYTOP), significant enhancements in humidity stability and temperature sensitivity of PEDOT:PSS based film were achieved. The prepared sensor exhibited excellent stability in environmental humidity ranged from 30% RH to 80% RH, and high sensitivity of −0.77% °C −1 for temperature sensing between 25 °C and 50 °C. Moreover, a wireless temperature sensing platform was obtained by integrating the printed sensor to a printed flexible hybrid circuit, which performed a stable real-time healthcare monitoring. Body temperature is an essential vital parameter reflecting the physiological activities. Monitoring of body temperature provides insight into human health conditions, such as cardiovascular condition, wound healing, pulmonological diagnostics, and syndromes prediction 1-4. Therefore, the flexible temperature sensor is highly desired to realize personal healthcare devices, which enable real-time monitoring of an individual's health state 5,6. Many efforts have been made to develop flexible temperature sensors, which mainly contain three types: pyroelectric detectors 7,8 , resistive temperature detectors (RTDs) 9,10 , and thermistors 11. Among them, the thermistor which relies on the thermo-resistive effect of sensing material is widely used, due to its simple device structure, fast response, and wide sensing range 12,13. Various thermistor materials have been developed and investigated, including composites of conductive filler with polymer, and temperature sensing conductive materials such as silver nanowire (AgNW) 14,15 , carbon nanotubes (CNTs) 16 , reduced graphene oxide (rGO) 17,18 , and poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) 19,20. However, most of these studies focused on improving the sensitivity and mechanical performance of temperature sensors, while their ambient stability, especially humidity stability, has rarely been considered. Additionally, the development of wearable temperature sensors via simple fabrication still a big challenge. Since the use of wearable devices inevitably exposed to ambient humidity, it is of great interest to develop a facile fabricated humidity-resistant temperature sensor. In contrast to its counterparts, PEDOT:PSS has been proven as a promising candidate for the wearable temperature sensor, not only owing to its outstanding mechanical properties and turntable electrical characteristics, but also the superior in simple, patternable, and high reproducible fabrication, such as printing 21,22. However, as a water-soluble polymer, the resistance of PEDOT:PSS also be easily affecte...

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Section: Resultsmentioning

confidence: 99%

Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring

Wang

Sekine

Takeda

et al. 2020

Sci Rep

206

183

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“…The resistance of a conductive material changes with temperature because of thermally introduced charge carrier scattering (resistance increase) or thermally enhanced charge transport (resistance decrease). [ 14 ] Changes in resistance were recorded as a function of temperature change (Figure 4C). Very good sensitivity was achieved, with a temperature coefficient of resistance (TCR) of ≈3353 ppm °C −1 , both before and after the recovery of structural damage (Figure 4D).…”

Section: Figurementioning

confidence: 99%

“…[9] (2410 ppm °C −1 ) and very close to that of bulk Ag and Pt (the widely used material for temperature sensors) that show TCR values of ≈3800 and ≈3900 ppm °C −1 , respectively. [ 14 ] For pressure sensing, we used a resistive sensor based on a composite of PPGPUU and CB. The application of pressure leads to an increased distance between the conductive fillers, and therefore to an increase in resistance (Figure 4E).…”

Section: Figurementioning

confidence: 99%

A Multifunctional Electronic Skin Empowered with Damage Mapping and Autonomic Acceleration of Self‐Healing in Designated Locations

et al. 2020

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Integrating self‐healing capabilities into soft electronic devices and sensors is important for increasing their reliability, longevity, and sustainability. Although some advances in self‐healing soft electronics have been made, many challenges have been hindering their integration in digital electronics and their use in real‐world conditions. Herein, an electronic skin (e‐skin) with high sensing performance toward temperature, pressure, and pH levels—both at ambient and/or in underwater conditions is reported. The e‐skin is empowered with a novel self‐repair capability that consists of an intrinsic mechanism for efficient self‐healing of small‐scale damages as well as an extrinsic mechanism for damage mapping and on‐demand self‐healing of big‐scale damages in designated locations. The overall design is based on a multilayered structure that integrates a neuron‐like nanostructured network for self‐monitoring and damage detection and an array of electrical heaters for selective self‐repair. This system has significantly enhanced self‐healing capabilities; for example, it can decrease the healing time of microscratches from 24 h to 30 s. The electronic platform lays down the foundation for the development of a new subcategory of self‐healing devices in which electronic circuit design is used for self‐monitoring, healing, and restoring proper device function.

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“…Besides, the electron transport efficiency within the 1D nanowire is improved as well. Other nanomaterials-based resistive temperature sensors also have showed such advantages of nanomaterials in temperature detecting (Joh et al, 2018;Sehrawat et al, 2018;Bang et al, 2019;Cui et al, 2019). However, reducing the materials dimension will not influence the deformation ratio of the PSS boundaries, which is related to the amount of the water absorbed, thus the change of S/V ratio will not influence the thermal sensitivity of PEDOT: PSS.…”

Section: Temperature Sensingmentioning

confidence: 99%

Simultaneously Optimize the Response Speed and Sensitivity of Low Dimension Conductive Polymers for Epidermal Temperature Sensing Applications

Tang

Zhang

et al. 2020

Front. Chem.

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Low dimension poly(3,4-ethylenedioxythiophene) poly (styrenesulfonate) (PEDOT: PSS) has been applied as resistor-type devices for temperature sensing applications. However, their response speed and thermal sensitivity is still not good enough for practical application. In this work, we proposed a new strategy to improve the thermal sensing performance of PEDOT: PSS by combined micro/nano confinement and materials doping. The dimension effect is carefully studied by fabricating different sized micro/nanowires through a low-cost printing approach. It was found that response speed can be regulated by adjusting the surface/volume (S/V) ratio of PEDOT: PSS. The fastest response (<3.5 s) was achieved by using nanowires with a maximum S/V ratio. Besides, by doping PEDOT: PSS nanowires with Graphene oxide (GO), its thermo-sensitivity can be maximized at specific doping ratio. The optimized nanowires-based temperature sensor was further integrated as a flexible epidermal electronic system (FEES) by connecting with wireless communication components. Benefited by its flexibility, fast and sensitive response, the FEES was demonstrated as a facile tool for different mobile healthcare applications.

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Tailoring the Temperature Coefficient of Resistance of Silver Nanowire Nanocomposites and their Application as Stretchable Temperature Sensors

Cited by 142 publications

References 35 publications

Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring

Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring

A Multifunctional Electronic Skin Empowered with Damage Mapping and Autonomic Acceleration of Self‐Healing in Designated Locations

Simultaneously Optimize the Response Speed and Sensitivity of Low Dimension Conductive Polymers for Epidermal Temperature Sensing Applications

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