Gold Nanoparticle Thin Film-Based Strain Sensors for Monitoring Human Pulse

Jheng, Wei-Wun; Su, Yu-Shun; Hsieh, Yun-Lien; Lin, Yu-Jhan; Tzeng, Shien-Der; Chang, Chih-Wei; Song, Jenn‐Ming; Kuo, Wu‐Hsien

doi:10.1021/acsanm.0c03167

Cited by 27 publications

(17 citation statements)

References 44 publications

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“…As shown in Figure S6, the VGCM50 sensor exhibited an accurate response to a small strain of 0.1‰–0.5‰ at the base strains from 1% to 4%. Compared with previously reported strain sensors ,,− (Figure d and Table S1), the VGCM50-based strain sensor possesses the lowest detection limit. Furthermore, cyclic stability is an important property of sensors for practical applications.…”

Section: Resultsmentioning

confidence: 74%

Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution

Han

et al. 2022

ACS Appl. Mater. Interfaces

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The development of microstrain sensors offers significant prospects in diverse applications, such as microrobots, intelligent human–computer interaction, health monitoring, and medical rehabilitation. Among strain sensor materials, vertical graphene (VG) has demonstrated considerable potential as a resistive material; however, VG-based strain sensors with high resolution are yet to be developed. In addition, the detection mechanism of VG has not been extensively investigated. Herein, we developed a VG canal mesh (VGCM) to fabricate a flexible strain sensor for ultralow strain sensing, achieving an accurate response to strains as low as 0.1‰ within a total strain range of 0%–4%. The detection of such low strains is due to the rigorous structural design and strain concentration effect of the three-dimensional micronano structure of the VGCM. Through experimental results and theoretical simulation, the evolution of microcracks in VG and the sensing mechanism of VG and VGCM are elaborated, and the unique advantages of VGCM are revealed. Finally, the VGCM-based strain sensors are proposed as portable breathing test equipment for rapid breathing detection.

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Section: Resultsmentioning

confidence: 74%

Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution

Han

et al. 2022

ACS Appl. Mater. Interfaces

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“…Tactile sensors with high sensitivity are made quite effectively with gold nanoparticles. They have been used to make stretchable strain sensors [53][54][55][56][57]. For health monitoring systems, gold nanowires (AuNWs) were integrated with latex rubber to fabricate AuNWs/latex strain sensor [58].…”

Section: Piezo-resistive Sensormentioning

confidence: 99%

Recent Advances in Flexible Sensors and Their Applications

Zazoum

Batoo

Khan

2022

Sensors

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Flexible sensors are low cost, wearable, and lightweight, as well as having a simple structure as per the requirements of engineering applications. Furthermore, for many potential applications, such as human health monitoring, robotics, wearable electronics, and artificial intelligence, flexible sensors require high sensitivity and stretchability. Herein, this paper systematically summarizes the latest progress in the development of flexible sensors. The review briefly presents the state of the art in flexible sensors, including the materials involved, sensing mechanisms, manufacturing methods, and the latest development of flexible sensors in health monitoring and soft robotic applications. Moreover, this paper provides perspectives on the challenges in this field and the prospect of flexible sensors.

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“…The need for miniaturization requires developing novel approaches on how to build even smaller, yet functional devices. One of these approaches is by utilizing nanoparticles and incorporating them into devices. − Either individual nanoparticles can be utilized or nanoparticles assembled into a thin layer. − …”

Section: Introductionmentioning

confidence: 99%

Multilayer Langmuir Film of Monodisperse Au Nanoclusters: Unusual Growth via Bilayers

et al. 2022

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The assembly of nanomaterials into thin films is an important area in the nanofabrication of novel devices. The monodispersity of nanoparticles plays an essential role in the resulting quality of the assembled mono-and multilayers. Larger polydispersity leads to smaller lateral correlation lengths and smaller domains of aligned nanoparticles, thus resulting in more point and line defects. Perfectly monodisperse nanoparticles should therefore minimize the number of defects in the assembled films. Despite tremendous progress in reducing the polydispersity of nanoparticles, there has been limited research on the assembly of thin films out of perfectly monodisperse nanoclusters. Here, we show a formation of Langmuir films using perfectly monodisperse gold nanoclusters with composition Au 32 ( n Bu 3 P) 12 Cl 8 exhibiting a diameter of 1.8 nm. Using both in situ and ex situ small-angle X-ray scattering, we show that the monolayer formed on a Langmuir− Blodgett trough exhibits long-range order. Moreover, after compressing the monolayer, we found that the stress accumulated prior to the monolayer collapse triggers a transition to a short-range order not previously reported. If such monolayer is compressed further, the second layer is not formed as in the case of standard nanoparticles. Instead, a growth of islands by an odd number of layers is observed, leading to a thin film with a structure consisting of two different orientations of the hexagonal lattice. Such anomalous behavior may have implications for the possibilities of thin-film formation.

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Gold Nanoparticle Thin Film-Based Strain Sensors for Monitoring Human Pulse

Cited by 27 publications

References 44 publications

Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution

Vertical Graphene Canal Mesh for Strain Sensing with a Supereminent Resolution

Recent Advances in Flexible Sensors and Their Applications

Multilayer Langmuir Film of Monodisperse Au Nanoclusters: Unusual Growth via Bilayers

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