Tunable-Sensitivity flexible pressure sensor based on graphene transparent electrode

Luo, Shi; Yang, Jun; Song, Xianlin; Zhou, Xi; Yu, Linfeng; Sun, Tai; Yu, Chongsheng; Huang, Deping; Du, Chunlei; Wei, Dapeng

doi:10.1016/j.sse.2018.04.003

Cited by 58 publications

(55 citation statements)

References 31 publications

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“…With excellent electrical properties, mechanical flexibility and optical transmittance, graphene has become one of the most promising materials for electrodes in tactile piezocapacitive sensors. For example, to obtain a tunable-sensitivity flexible pressure sensor, a classic method was employed by Luo and coworkers, wherein graphene was used as the electrodes, and polydimethylsiloxane (PDMS) pyramids with different spacings were used as the dielectric layer [42]. By a theoretical calculation model, the authors simulated the relationship curve between the sensitivity and PDMS pyramids with different spacings.…”

Section: Capacitive Tactile Sensorsmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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HIGHLIGHTS• Tremendous progress has been advanced by research into graphene and its derivatives with great benefits toward low-cost, portable, and real-time tactile sensors/electronic skin.• The review presented herein direct future efforts aimed at high-quality graphene-based tactile sensors and their implications for the wider scientific community.• The paper also are informative regarding some basic and crucial issues regarding graphene and its derivatives, such as charge-transport principles, doping/trapping behaviors, correlations between structure/morphology and properties/functions.ABSTRACT Skin is the largest organ of the human body and can perceive and respond to complex environmental stimulations. Recently, the development of electronic skin (E-skin) for the mimicry of the human sensory system has drawn great attention due to its potential applications in wearable human health monitoring and care systems, advanced robotics, artificial intelligence, and human-of graphene materials; (2) state-of-the-art protocols recently developed for high-performance tactile sensing, including representative examples; and (3) perspectives and current challenges for graphene-based tactile sensors in E-skin applications. A summary of these cutting-edge developments intends to provide readers with a deep understanding of the future design of high-quality tactile sensing devices and paves a path for their future commercial applications in the field of E-skin.

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Section: Capacitive Tactile Sensorsmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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“…Capacitance is inversely proportional to the separation distance between the two plates. A small amount of exerted force may cause the plates to deflect and capacitance to change [190]. Like the piezoresistive one, the piezocapacitive sensing principle is widely used in wearable sensors, including the use of graphene and its derivatives [191,192], CNT [193,194], metal NPs and NWs [195][196][197], conductive polymers [198,199] and MXenes [200].…”

Section: Pizocapacitivementioning

confidence: 99%

“…Graphene has been used with PET substrates, such as a graphene electrode [190,247,268], a graphene FET [269] and a stencil mask [192]. Also, it has been used with PDMS, such as a graphene film [242] or as an rGO at PDMS [238] or as an rGO at PDMS and ITO at PET [243].…”

Section: Graphene and Graphene Derivativesmentioning

confidence: 99%

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Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives

Al-Qatatsheh

Morsi

Zavabeti

et al. 2020

Sensors

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Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials’ properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.

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“…Compared with other material based strain sensors, the ultra-thin transparent graphene devices are more commercial and easily integrated, which has attracted much attention for their potential applications in miniaturized and high capability strain sensors. In recent years, different types of graphene-based strain sensors have been developed, including resistance-type graphene strain sensors 9,[15][16][17][18][19] , capacitive strain sensors [20][21][22] , fiber-optic graphene strain sensors or optical strain sensors deal with the plasmonic-enhanced Raman spectrum [23][24][25][26] , in-plane or tunneling graphene strain sensors 27 and other graphene strain sensors [28][29][30][31] . Among the abovementioned strain sensors, the graphene-based piezoresistive sensors have become the most commonly used electromechanical sensors with relatively simple read-out systems.…”

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confidence: 99%

Investigation of a new graphene strain sensor based on surface plasmon resonance

Chen

et al. 2020

Sci Rep

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The high confinement of surface plasmon polaritons in graphene nanostructures at infrared frequencies can enhance the light-matter interactions, which open up intriguing possibilities for the sensing. Strain sensors have attracted much attention due to their unique electromechanical properties. In this paper, a surface plasmon resonance based graphene strain sensor is presented. The considered sensing platform consists of arrays of graphene ribbons placed on a flexible substrate which enables efficient coupling of an electromagnetic field into localized surface plasmons. When the strain stretching is applied to the configuration, the localized surface plasmon resonance frequency sensitively shift. The strain is then detected by measuring the frequency shifts of the localized plasmon resonances. This provides a new optical method for graphene strain sensing. Our results show that the tensile direction is the key parameter for strain sensing. Besides, the sensitivity and the figure of merit were calculated to evaluate the performance of the proposed sensor. The calculated figure of merit can be up to two orders of magnitude, which could be potentially useful from a practical point of view.

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Tunable-Sensitivity flexible pressure sensor based on graphene transparent electrode

Cited by 58 publications

References 31 publications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives

Investigation of a new graphene strain sensor based on surface plasmon resonance

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