Multifunctional and high-performance electronic skin based on silver nanowires bridging graphene

Qiao, Yancong; Wang, Yunfan; Jian, Jinming; Li, Mingrui; Jiang, Guangya; Li, Xiaoshi; Deng, Ge; Ji, Shourui; Wei, Yuhong; Pang, Yu; Wu, Qi; Tian, He; Yang, Yi; Wu, Xiaoming; Ren, Tian‐Ling

doi:10.1016/j.carbon.2019.08.032

Cited by 70 publications

(41 citation statements)

References 41 publications

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“…One of the major trends is to apply textiles made of functional yearns and coatings or to use flexible materials to fabricate devices for detecting physiological signals [24][25][26] , conducting drug delivery 27 , and realizing intuitive humanmachine interfaces [28][29][30][31] . Another trend is the thin-film technique for stretchable electronics and wearables, including epidermal sensors, the epidermal electronic system (EES), and electronic tattoos (e-tattoos), which have demonstrated a wide range of functionalities, including physiological sensing [32][33][34][35][36][37][38][39][40][41][42][43] , on-skin display 44 , ultraviolet (UV) detection 45 , transdermal therapeutics 34 , human-machine interface (HMI) 46 , prosthetic electronic skin 47 , and skin-adhesive rechargeable batteries 48,49 . J.…”

Section: Introductionmentioning

confidence: 99%

An epidermal sEMG tattoo-like patch as a new human–machine interface for patients with loss of voice

Liu

Dong

et al. 2020

Microsyst Nanoeng

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Throat cancer treatment involves surgical removal of the tumor, leaving patients with facial disfigurement as well as temporary or permanent loss of voice. Surface electromyography (sEMG) generated from the jaw contains lots of voice information. However, it is difficult to record because of not only the weakness of the signals but also the steep skin curvature. This paper demonstrates the design of an imperceptible, flexible epidermal sEMG tattoo-like patch with the thickness of less than 10 μm and peeling strength of larger than 1 N cm −1 that exhibits large adhesiveness to complex biological surfaces and is thus capable of sEMG recording for silent speech recognition. When a tester speaks silently, the patch shows excellent performance in recording the sEMG signals from three muscle channels and recognizing those frequently used instructions with high accuracy by using the wavelet decomposition and pattern recognization. The average accuracy of action instructions can reach up to 89.04%, and the average accuracy of emotion instructions is as high as 92.33%. To demonstrate the functionality of tattoo-like patches as a new human-machine interface (HMI) for patients with loss of voice, the intelligent silent speech recognition, voice synthesis, and virtual interaction have been implemented, which are of great importance in helping these patients communicate with people and make life more enjoyable.

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Section: Introductionmentioning

confidence: 99%

An epidermal sEMG tattoo-like patch as a new human–machine interface for patients with loss of voice

Liu

Dong

et al. 2020

Microsyst Nanoeng

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“…In recent years, with the development of sensors able to measure different parameters (e.g., temperature, pressure, and humidity), mimicking the functioning of human skin receptors, tactile sensing technologies have been widely explored to reproduce the human sense of touch [1][2][3][4][5][6][7][8][9][10][11]. Such devices are mainly classified according to the transduction principle that they exploit, distinguishing between piezoresistive [12], capacitive [13], optical [9,14,15], and piezoelectric sensors [7,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Seedless Hydrothermal Growth of ZnO Nanorods as a Promising Route for Flexible Tactile Sensors

et al. 2020

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Hydrothermal growth of ZnO nanorods has been widely used for the development of tactile sensors, with the aid of ZnO seed layers, favoring the growth of dense and vertically aligned nanorods. However, seed layers represent an additional fabrication step in the sensor design. In this study, a seedless hydrothermal growth of ZnO nanorods was carried out on Au-coated Si and polyimide substrates. The effects of both the Au morphology and the growth temperature on the characteristics of the nanorods were investigated, finding that smaller Au grains produced tilted rods, while larger grains provided vertical rods. Highly dense and high-aspect-ratio nanorods with hexagonal prismatic shape were obtained at 75 °C and 85 °C, while pyramid-like rods were grown when the temperature was set to 95 °C. Finite-element simulations demonstrated that prismatic rods produce higher voltage responses than the pyramid-shaped ones. A tactile sensor, with an active area of 1 cm2, was fabricated on flexible polyimide substrate and embedding the nanorods forest in a polydimethylsiloxane matrix as a separation layer between the bottom and the top Au electrodes. The prototype showed clear responses upon applied loads of 2–4 N and vibrations over frequencies in the range of 20–800 Hz.

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“…25,26 Ren reported an electronic skin using GR bridged with AgNWs, which showed a large measuring range and high mechanical sensitivity. 27 Fortunately, AgNW has low absorption in the near ultraviolet region, so its addition to photoresists has little influence on the photopolymerization depth. 16 In summary, the one-step fabrication of composite photoresist with AgNW/GR as conductive elements may endow traditional photoresist with good electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and electrochemical application of an AgNW/graphene/SU‐8 composite conductive photoresist

Wei

et al. 2021

J of Applied Polymer Sci

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Photoresists play an increasingly important role in industrial fields like microelectro mechanical systems, micromachining, and chip packaging. However, the traditional one-component photoresist is insulated, and additional steps are required to make it conductive, which complicates the process and limits its application. In order to solve the problem, we establish a one-step strategy to build conductive composite photoresist. Herein, graphene (GR) and silver nanowire (AgNW) are doped into SU-8 photoresist to fabricate a photopatternable conductive composite. The composite photoresist is employed to make micro-patterns on an ITO electrode using photolithography, followed by electrochemical reduction of copper nanoparticles (CuNPs) to produce a nonenzymatic sensing coating. Experimental results prove that the response current of the obtained sensor is linearly related to the concentration of hydrogen peroxide in the range of 1-25 mM. The sensitivity and detection limit of the sensor are 41.8 μA mM À1 cm À2 and 9 μM, respectively. Moreover, excellent sensing performance including anti-interference, repeatability, and stability demonstrates the potential application of CuNPs/AgNW/GR/SU-8 composite material in electrochemical sensing.

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Multifunctional and high-performance electronic skin based on silver nanowires bridging graphene

Cited by 70 publications

References 41 publications

An epidermal sEMG tattoo-like patch as a new human–machine interface for patients with loss of voice

An epidermal sEMG tattoo-like patch as a new human–machine interface for patients with loss of voice

Seedless Hydrothermal Growth of ZnO Nanorods as a Promising Route for Flexible Tactile Sensors

Preparation and electrochemical application of an AgNW/graphene/SU‐8 composite conductive photoresist

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