Creep- and fatigue-resistant, rapid piezoresistive responses of elastomeric graphene-coated carbon nanotube aerogels over a wide pressure range

Tsui, Michelle N.; Islam, Mohammad F.

doi:10.1039/c6nr07432d

Cited by 36 publications

(41 citation statements)

References 43 publications

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“…In addition, their scalable production makes for an attractive choice for practical implementation [21]. Recently, researchers have developed several porous materials as templates to generate 3D graphene porous structures, such as polymer sponges (including polyurethane (PU) and polyvinyl chloride (PVC)) [73][74][75][76][77][78], various fabrics [79][80][81], cellulose paper [82], multilayer silk [83], all kinds of metal foams [84][85][86], and others [87][88][89].…”

Section: Graphene Tactile Sensors Using 3d Porous Structuresmentioning

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: Graphene Tactile Sensors Using 3d Porous Structuresmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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“…Graphene 44,45,46 and metal 47 are both intrinsically piezoresistive. For metals, this effect is predominately geometrical; there is a negligible change in the resistivity with strain.…”

Section: Mechanical Sensingmentioning

confidence: 99%

Metallic nanoislands on graphene: a metamaterial for chemical, mechanical, optical, and biological applications

et al. 2017

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Graphene decorated with metallic nanoparticles exhibits electronic, optical, and mechanical properties that neither the graphene nor the metal possess alone. These composite films have electrical conductivity and optical properties that can be modulated by a range of physical, chemical, and biological signals. Such properties are controlled by the morphology of the nanoisland films, which can be deposited on graphene using a variety of techniques, including in situ chemical synthesis and physical vapor deposition. These techniques produce non-random (though loosely defined) morphologies, but can be combined with lithography to generate deterministic patterns. Applications of these composite films include chemical sensing and catalysis, energy storage and transport (including photoconductivity), mechanical sensing (using a highly sensitive piezroresistive effect), optical sensing (including so-called “piezoplasmonic” effects), and cellular biophysics (i.e sensing the contractions of cardiomyocytes and myoblasts).

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“…Graphene, because of the prominent mechanical strength, high electric and thermal conductivity, and high carrier mobility, has received ever‐growing interest in creating pressure sensors, together with other candidates like carbon nanotubes (CNTs), metallic nanowires, and polypyrrole . Wavy graphene structure can form periodic wrinkles and is considered as one type of skin‐inspired crumpled structures, which can be fabricated by the pattern‐assisted method and the pre‐strain method .…”

Section: Introductionmentioning

confidence: 99%

Wavelength‐Gradient Graphene Films for Pressure‐Sensitive Sensors

Wang

Qiu

Jia

et al. 2018

Adv Materials Technologies

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Graphene, because of the prominent mechanical strength, [17] high electric and thermal conductivity, [18] and high carrier mobility, [19][20][21] has received ever-growing interest in creating pressure sensors, [22,23] together with other candidates like carbon nanotubes (CNTs), [24,25] metallic nanowires, [26] and polypyrrole. [27] Wavy graphene structure can form periodic wrinkles and is considered as one type of skin-inspired crumpled structures, which can be fabricated by the pattern-assisted method [28] and the pre-strain method. [29] Wavy graphene materials have been widely applied in diverse applications, for example, capacitors [30] and strain sensors. [31] However, the wavy graphene structure, especially the one with gradient feature, has not attracted enough attention for developing novel pressure sensors.In this work, we prepared wavelength-gradient graphene films to exhibit the gradient feature and other conventional properties of pressure sensors. Due to the gradient structure, the electrical conductivity in the sensors increased when applying equal pressures on different areas where the average wavelength of the wrinkles increased. And the pressure sensor also exhibited a high sensitivity toward external pressure in a wide range (0-5000 Pa), a low limit of detection of 24.5 Pa, and a slow response time of ≈1 s. Accordingly, we further anticipate the novel pressure sensor to find practical applications in detecting the position of equal pressures and in amplifying the difference of electric signal of two similar pressures, due to the pressure-sensitive performance of the unique gradient structure. Figure 5. a) The detection limit of the pressure sensor and its response time. b) Current change of the pressure sensor at different pressure of 49, 122.5, 367.5, and 980 Pa. c) Current change of the pressure sensor under a pressure of 2 kPa at a frequency of 0.025 Hz for 500 cycles, and current change of the pressure sensor restarting after a 30 min pause. www.advancedsciencenews.com

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Creep- and fatigue-resistant, rapid piezoresistive responses of elastomeric graphene-coated carbon nanotube aerogels over a wide pressure range

Cited by 36 publications

References 43 publications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Metallic nanoislands on graphene: a metamaterial for chemical, mechanical, optical, and biological applications

Wavelength‐Gradient Graphene Films for Pressure‐Sensitive Sensors

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