Flexible temperature sensors made of aligned electrospun carbon nanofiber films with outstanding sensitivity and selectivity towards temperature

Lee, Jeng‐Hun; Chen, Haomin; Kim, Eun Young; Zhang, Heng; Wu, Ke; Zhang, Hongming; Shen, Xi; Zheng, Qingbin; Yang, Jinglei; Jeon, Seungwon; Kim, Jang Kyo

doi:10.1039/d1mh00018g

Cited by 73 publications

(54 citation statements)

References 51 publications

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“…Even any material with a carbon backbone can be used as a precursor for carbon materials, PAN is the most commonly used carbon precursor due to its high carbon yield up to 56%, flexibility for maintaining the structure, excellent mechanical and electrochemical properties [48,49]. PAN based carbon nanofibers have been used in many fields including electrodes [50–56], supercapacitors [57–63], fuel cells [64–67], sensors [68–72], solar cells [73–75], biomedical applications [76] and tissue engineering applications [77–81]. For instance, Kumar et al.…”

Section: Introductionmentioning

confidence: 99%

A statistical analysis on the influence of process and solution properties on centrifugally spun nanofiber morphology

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Ünlü

Yanılmaz

2021

Journal of Industrial Textiles

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Centrifugal spinning is a fast and safe nanofiber production technique and polyacrylonitrile (PAN) nanofibers have been widely studied for many applications including energy storage, filtration, sensors, and biomedical applications. Nanofiber morphology, specific surface area, porosity and average fiber diameter are important to determine the performance of nanofibers in these fields. In centrifugal spinning, nanofiber morphology and average fiber diameter are influenced by solution properties and process parameters including rotational speed, feeding rate, collector distance, and nozzle diameter. In this study, the effect of solution concentration, rotational speed, feeding rate, collector distance and nozzle diameter on average fiber diameter and fiber morphology were studied and statistical analysis was performed to determine the main factors. Optimum solution and process parameters were determined as well. Increased average fiber diameter was seen with increasing polymer concentration and nanofibers produced at 4000 rpm with the feeding rate of 60 ml/h had the lowest average fiber diameter for all studied nozzle sizes (0.3 mm, 0.5 mm and 0.8 mm). 8 wt. % PAN solution was centrifugally spun with the rotational speed of 4000 rpm, feeding rate of 60 ml/h, collector distance of 20 cm and nozzle diameter of 0.3 mm and bead free nanofibers with the average fiber diameter of 680 ± 87 nm was observed.

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Section: Introductionmentioning

confidence: 99%

A statistical analysis on the influence of process and solution properties on centrifugally spun nanofiber morphology

Atıcı

Ünlü

Yanılmaz

2021

Journal of Industrial Textiles

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“…Traditional temperature measurement equipment, including mercury thermometer and infrared thermometer, can only achieve measurement at a given point of time. They cannot provide real-time temperature data [12]. In order to reach continuous and stable temperature monitoring, comfortable flexible temperature sensors are needed and will be widely applied in the temperature monitoring of wearable products [13,14].…”

Section: Introductionmentioning

confidence: 99%

Research of a Novel Ag Temperature Sensor Based on Fabric Substrate Fabricated by Magnetron Sputtering

2021

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TPU-coated polyester fabric was used as the substrate of a flexible temperature sensor and Ag nanoparticles were deposited on its surface as the temperature sensing layer by the magnetron sputtering method. The effects of sputtering powers and heat treatment on properties of the sensing layers, such as the temperature coefficient of resistance (TCR), linearity, hysteresis, drift, reliability, and bending resistance, were mainly studied. The results showed that the TCR (0.00234 °C−1) was the highest when sputtering power was 90 W and sputtering pressure was 0.8 Pa. The crystallinity of Ag particles would improve, as the TCR was improved to 0.00262 °C−1 under heat treatment condition at 160°. The Ag layer obtained excellent linearity, lower hysteresis and drift value, as well as good reliability and bending resistance when the sputtering power was 90 W. The flexible temperature sensor based on the coated polyester fabric improved the softness and comfortableness of sensor, which can be further applied in intelligent wearable products.

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“…reported highly flexible and sensitive temperature sensors based on aligned carbon nanofiber (ACNF) films (Figure 11f). [ 187 ] According to the experimental results, the sensor exhibited a remarkable temperature sensitivity at 1.52% °C −1 , known as the most sensitive sensor in the existing carbon‐based sensors. Meanwhile, it was found that the carbonization temperature was significant in sensitivity control by adjusting atomic structures of ACNFs.…”

Section: Structures‐derived Propertiesmentioning

confidence: 99%

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confidence: 99%

Conductive Materials with Elaborate Micro/Nanostructures for Bioelectronics

2022

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Bioelectronics, an emerging field with the mutual penetration of biological systems and electronic sciences, allows the quantitative analysis of complicated biosignals together with the dynamic regulation of fateful biological functions. In this area, the development of conductive materials with elaborate micro/nanostructures has been of great significance to the improvement of high‐performance bioelectronic devices. Thus, here, a comprehensive and up‐to‐date summary of relevant research studies on the fabrication and properties of conductive materials with micro/nanostructures and their promising applications and future opportunities in bioelectronic applications is presented. In addition, a critical analysis of the current opportunities and challenges regarding the future developments of conductive materials with elaborate micro/nanostructures for bioelectronic applications is also presented.

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Flexible temperature sensors made of aligned electrospun carbon nanofiber films with outstanding sensitivity and selectivity towards temperature

Abstract: Continuous real-time measurement of body temperature using a wearable sensor is an essential part of human health monitoring. Electrospun aligned carbon nanofiber (ACNF) films are employed to assemble flexible temperature...

Cited by 73 publications

References 51 publications

A statistical analysis on the influence of process and solution properties on centrifugally spun nanofiber morphology

A statistical analysis on the influence of process and solution properties on centrifugally spun nanofiber morphology

Research of a Novel Ag Temperature Sensor Based on Fabric Substrate Fabricated by Magnetron Sputtering

Conductive Materials with Elaborate Micro/Nanostructures for Bioelectronics

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