Flexible and transparent capacitive pressure sensor with patterned microstructured composite rubber dielectric for wearable touch keyboard application

Shi, Ruilong; Lou, Zheng; Chen, Shuai; Shen, Guozhen

doi:10.1007/s40843-018-9267-3

Cited by 141 publications

(101 citation statements)

References 32 publications

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“…A batteryless Bluetooth smart sensor that exploits a wireless power transfer system was recently reported that overcomes this disadvantage . In addition to NFC and Bluetooth, the wireless communication method using a printed circuit board (PCB) is one of the most frequently used wireless communication methods . Several other wireless communication technologies that can communicate with smart mobile devices include Zigbee, wi‐fi, etc., all of which continue to be further developed.…”

Section: Advanced Strategies For Wearable Smart Sensing Systems Basedmentioning

confidence: 99%

Smart Sensing Systems Using Wearable Optoelectronics

Hwang

et al. 2020

Advanced Intelligent Systems

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A wearable smart sensing system is capable of continuously monitoring biometric information such as respiration, pulse, and body temperature while attached to an arbitrary surface on the user's body to be utilized freely during activities. Research conducted on new materials, fabrication processes, structure of electrodes, and wireless communication technologies has made constant progress in the development of smart sensing systems that use entirely wearable forms of devices to go beyond conventional devices that are based on intrinsically rigid components, such as silicon. Among various platforms that can be used in the development of smart sensing systems, optoelectronics provides innovative sensing functions (e.g., human–machine interfaces and phototherapy) that can be transferred from traditional healthcare to smart healthcare, such as point of care. Optoelectronics are light‐mediated displays that allow a light source to be controlled and a large light spectrum to be detected. Recently, this platform that uses smart and wearable optoelectronic sensing systems has become increasingly advanced to better help human beings treat their diseases through self‐healthcare. Herein, recent advanced technologies in materials, structures, and wireless platforms for smart sensors using wearable optoelectronics are reviewed.

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Section: Advanced Strategies For Wearable Smart Sensing Systems Basedmentioning

confidence: 99%

Smart Sensing Systems Using Wearable Optoelectronics

Hwang

et al. 2020

Advanced Intelligent Systems

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“…[156] Our group successfully developed the patterned PDMS/silver nanowires (Ag NWs) based flexible transparent capacitive pressure sensor as shown in Figure 8a-c. [157] Compared to the planar PDMS dielectric layer, the patterned microstructured sensor shows a lower detection limit, a higher sensitivity (0.831 kPa −1 ), good stability, and durability. Currently, these devices can only perceive limited information and be always rigid, such as touch location.…”

Section: Human-machine Interactionmentioning

confidence: 99%

“…Wearable capacitive touch sensors which possess advantages of temperature independent and low power consumption have been widely used in HMI. [156] Our group successfully developed the patterned PDMS/silver nanowires (Ag NWs) based flexible transparent capacitive pressure sensor as shown in Figure 8a-c. [157] Compared to the planar PDMS dielectric layer, the patterned microstructured sensor shows a lower detection limit, a higher sensitivity (0.831 kPa −1 ), good stability, and durability. To achieve the practical application of flexible capacitive sensor in HMI, a large-scale flexible pressure sensor array is developed, which can be used as a flexible wearable keyboard to realize the function of traditional keyboard.…”

Section: Human-machine Interactionmentioning

confidence: 99%

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Recent Advances in Smart Wearable Sensing Systems

Lou

Wang

Shen

2018

Adv Materials Technologies

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158

114

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a research field that integrates a highly diverse range of researchers and practitioners, including electronics, bioengineering, systems engineering, materials science, and other interdisciplinary expertise. [12][13][14][15] However, wearable sensors currently face great challenges because they are still in the initial stage of development. [16] For example, wearable sensors need to be integrated into the proper shape surfaces with compatibility, durability, and abrasion resistance. [17,18] Existing commercial wearable sensing devices are mainly implemented by encapsulating integrated circuits on rigid packaged solid substrates. But rigid packages are not mechanically compatible with soft and curved human bodies, resulting in unreliable measurement results due to measurement positions changed and unreliable skin contact. [19,20] In addition, smart wearable sensing requires complex sensing systems, which can complete a variety of functional electronic components, including data acquisition and processing, equipment operation control, intelligent data display, and self-powered operation.Despite these challenges, new SWSS with flexibility and stretchability has been evolved over the years as the ability to process large amounts of information in real time grows rapidly. [18,21,22] Flexible and stretchable electronic devices are emerging technologies that aim to fabricate electronic circuits on "soft" substrates to achieve mechanical flexibility and stretchable of sensor components, making it possible to construct SWSS with unique characteristics, such as great conformability, excellent stretchability, low cost, and low weight. [23] Flexible sensors can capture target analytes more effectively and produce high-quality signals, while the traditional ones are unable to capture poor quality signal transduction analytes due to their rigidity hindering. [24] In particularly, users can perceive their surroundings in a convenient, effective, and timely manner with the SWSS help. In recent years, the focus on the construction of ultrathin flexible and stretchable sensors has prompted emerging applications of SWSS. [25][26][27][28] Meanwhile, the development of SWSS has become a revolutionary process in sensing technology. In general, the key factor of the SWSS is to respond quickly and accurately to the detection target and then transmit the processed data to the user in an easy to operate display mode. [18] However, despite the rapid growth of wearable and flexible sensing technologies, few SWSSs appear on the market due to their inherent limitations. Therefore, a comprehensive review and systematic summary of the latest technology in the development of SWSS will be beneficial for the entire field.Wearable technology with widespread public attention has generated tremendous economic and social impact, resulting in changes in healthcare procedures and personal lifestyle. Smart wearable sensing systems, as an important type of device in wearable technology which can detect various stimuli relevant to biological species or spe...

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“…Therefore, it is particularly important to develop diverse HMI sensors with high sensitivity and fast response. Traditional sensors generally detect signals in direct contacts, such as pressure sensors, strain sensors, etc. However, direct contact sensing not only brings inevitable mechanical wear but limits their use in a broader range of applications such as remote sensing and sensing in toxic or harmful environments.…”

mentioning

confidence: 99%

Flexible Smart Noncontact Control Systems with Ultrasensitive Humidity Sensors

Yang

Shi

Lou

et al. 2019

Small

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135

101

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The development of noncontact humidity sensors with high sensitivity, rapid response, and a facile fabrication process is urgently desired for advanced noncontact human–machine interaction (HMI) applications. Here, a flexible and transparent humidity sensor based on MoO3 nanosheets is developed with a low‐cost and easily manufactured process. The designed humidity sensor exhibits ultrahigh sensitivity, fast response, great stability, and high selectivity, exceeding the state‐of‐the‐art humidity sensors. Furthermore, a wearable moisture analysis system is assembled for real‐time monitoring of ambient humidity and human breathing states. Benefiting from the sensitive and rapid response to fingertip humidity, the sensors are successfully applied to both a smart noncontact multistage switch and a novel flexible transparent noncontact screen for smart mobile devices, demonstrating the potential of the MoO3 nanosheets‐based humidity sensors in future HMI systems.

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Flexible and transparent capacitive pressure sensor with patterned microstructured composite rubber dielectric for wearable touch keyboard application

Cited by 141 publications

References 32 publications

Smart Sensing Systems Using Wearable Optoelectronics

Smart Sensing Systems Using Wearable Optoelectronics

Recent Advances in Smart Wearable Sensing Systems

Flexible Smart Noncontact Control Systems with Ultrasensitive Humidity Sensors

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