2019
DOI: 10.3390/s19092077
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A Spray-on, Nanocomposite-Based Sensor Network for in-Situ Active Structural Health Monitoring

Abstract: A new breed of nanocomposite-based spray-on sensor is developed for in-situ active structural health monitoring (SHM). The novel nanocomposite sensor is rigorously designed with graphene as the nanofiller and polyvinylpyrrolidone (PVP) as the matrix, fabricated using a simple spray deposition process. Electrical analysis, as well as morphological characterization of the spray-on sensor, was conducted to investigate percolation characteristic, in which the optimal threshold (~0.91%) of the graphene/PVP sensor w… Show more

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Cited by 21 publications
(15 citation statements)
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“…Definitely, the sprayer actuated by manumotive compressed air is a better alternative for facilely fabricating films. Stimulated by the excellent manufacturing capability and vast options of functional ink, spraying technique has appeared in the fabrication of a wide range of wearable sensors, including accelerometer, strain sensor, pressure sensor, temperature sensor, gas sensor and glucose sensor [179,[181][182][183][184][185][186]. Vapor deposition, along with metal sputtering, has shown strong fabricating ability for membranes, and many flexible devices have been achieved through this technique (represented by the tattoo sensor form Rogers' group [187]).…”
Section: Facile Film-forming Techniquesmentioning
confidence: 99%
“…Definitely, the sprayer actuated by manumotive compressed air is a better alternative for facilely fabricating films. Stimulated by the excellent manufacturing capability and vast options of functional ink, spraying technique has appeared in the fabrication of a wide range of wearable sensors, including accelerometer, strain sensor, pressure sensor, temperature sensor, gas sensor and glucose sensor [179,[181][182][183][184][185][186]. Vapor deposition, along with metal sputtering, has shown strong fabricating ability for membranes, and many flexible devices have been achieved through this technique (represented by the tattoo sensor form Rogers' group [187]).…”
Section: Facile Film-forming Techniquesmentioning
confidence: 99%
“…Structural Health Monitoring (SHM) has come to prominence can detect defects in their early stage without risking the normal functionality of the structure under inspection. Ultrasonic SHM is an emerging and promising subfield, owing to its ability in monitoring multi-scale structures using both acoustic emission (AE) and guided ultrasonic waves (GUWs) approaches in a broad frequency regime [1][2][3][4].…”
Section: Introductionmentioning
confidence: 99%
“…In ultrasonic SHM, it is critical to develop a network of sensors to quantify and locate structural damage [5][6][7]. A broad range of sensors have been developed for this purpose, including lead zirconate titanate (PZT) wafers [8], carbon nanotube sensors [9,10], optical fibres [11], zinc oxide sensors [12], and graphene/polyvinylpyrrolidone (PVP) sensor [1]. Since a dense grid of sensors is usually required, not only the cost of production is a critical matter, but also sensors' weight and simplicity of fabrication becomes important.…”
Section: Introductionmentioning
confidence: 99%
“…In lieu of conventional NDE approaches, guided ultrasonic wave (GUW)-based inspection [12][13][14][15][16][17] has proven capability of striking a balance among resolution, detectability, practicality, and cost. The premise of GUW-based detection lies in the fact that interaction between GUWs and damage will change wave propagation attributes, inducing delay in arrival time of wave packet, attenuation of wave energy, wave scattering, and mode conversion among others, in which rich information pertaining to damage is encoded.…”
Section: Introductionmentioning
confidence: 99%