The development of a pressure sensor using a technique for patterning silver nanowires on 3-dimensional curved PDMS membranes

Helgason, Rick; Campigotto, Angelica; Lai, Yongjun

doi:10.1088/1361-6439/aba226

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…When subjected to strain, the resistance of such a network increases due to disconnections which occur at some of the junctions between individual AgNWs [15]. This property has been well-explored and used in a variety of sensors and devices, such as strain gauges, human motion detectors, and other wearable sensors [15][16][17].…”

Section: Design and Fabricationmentioning

confidence: 99%

Increased sensitivity of smart contact lenses for continuous intraocular pressure measurement using ring-shaped design

Helgason¹,

Lai²

2022

Flex. Print. Electron.

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Contact lens sensors for continuous intraocular pressure measurement are emerging as an alternate system for monitoring the progression and treatment of glaucoma. To date, such sensors have primarily consisted of strain gauges embedded on traditional contact lenses. This work presents a novel contact lens design consisting of a ring-shaped contact lens with a piezoresistive strain gauge using silver nanowires. We observe an increase in IOP measurement sensitivity of the device with an increase inner diameter of the ring. Ring-shaped sensors with an inner diameter of 2.7 mm show an increase in sensitivity of up to 7.1% and ring-shaped sensors with an inner diameter of 4.7 mm show an increase in sensitivity of up to 17.9%. It is expected that by incorporating a ring-shaped lens, other strain gauge-based smart contact lenses in the literature would experience similar increase in sensitivity.

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Section: Design and Fabricationmentioning

confidence: 99%

Increased sensitivity of smart contact lenses for continuous intraocular pressure measurement using ring-shaped design

Helgason¹,

Lai²

2022

Flex. Print. Electron.

Self Cite

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“…Silicon-based MEMS piezoresistive pressure sensor has always been a mature and stable direction, which is suitable for developing TPMS system, whose principle is the piezoresistive effect [9]. The sensitivity of the piezoresistive sensor can be improved by using new materials and structural innovation [10][11][12][13][14]. However, it is very difficult to mass-manufacture these new structures and materials.…”

Section: Introductionmentioning

confidence: 99%

Development of MEMS composite sensor with temperature compensation for tire pressure monitoring system

Zhang

Wang

Xie

et al. 2021

J. Micromech. Microeng.

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The pressure and temperature inside the tire is mainly monitored by the tire pressure monitoring system (TPMS). In order to improve the integration of the TPMS system, moreover enhance the sensitivity and temperature-insensitivity of pressure measurement, this paper proposes a microelectromechanical (MEMS) chip-level sensor based on stress-sensitive aluminum–silicon hybrid structures with amplified piezoresistive effect and temperature-dependent aluminum–silicon hybrid structures for hardware and software temperature compensations. Two types of aluminum–silicon hybrid structures are located inside and outside the strained membrane to simultaneously realize the measurement of pressure and temperature. The model of this composite sensor chip is firstly designed and verified for its effectiveness by using finite element numerical simulation, and then it is fabricated based on the standard MEMS process. The experiments indicate that the pressure sensitivity of the sensor is between 0.126 mV/(V·kPa) and 0.151 mV/(V·kPa) during the ambient temperature ranges from −20 °C to 100 °C, while the measurement error, sensitivity and temperature coefficient of temperature-dependent hybrid structures are individually ±0.91 °C, −1.225 mV/(V °C) and −0.150% °C−1. The thermal coefficient of offset (TCO) of pressure measurement can be reduced from −3.553%FS °C−1 to −0.375%FS °C−1 based on the differential output of the proposed sensor. In order to obtain the better performance of temperature compensation, Elman neural network based on ant colony algorithm is applied in the data fusion of differential output to further eliminate the temperature drift error. Based on which, the overall measured error is within 3.45 kPa, which is less than ±1.15%FS. The TCO is −0.017%FS °C−1, and the thermal coefficient of span is −0.020%FS °C−1. The research results may provide a useful reference for the development of the high-performance MEMS composite sensor for the TPMS system.

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Recent progress for silver nanowires conducting film for flexible electronics

et al. 2021

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Graphic abstract Silver nanowires (AgNWs), as one-dimensional nanometallic materials, have attracted wide attention due to the excellent electrical conductivity, transparency and flexibility, especially in flexible and stretchable electronics. However, the microscopic discontinuities require AgNWs be attached to some carrier for practical applications. Relative to the preparation method, how to integrate AgNWs into the flexible matrix is particularly important. In recent years, plenty of papers have been published on the preparation of conductors based on AgNWs, including printing techniques, coating techniques, vacuum filtration techniques, template-assisted assembly techniques, electrospinning techniques and gelating techniques. The aim of this review is to discuss different assembly method of AgNW-based conducting film and their advantages. Conducting films based on silver nanowires (AgNWs) have been reviewed with a focus on their assembly and their advantages.

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The development of a pressure sensor using a technique for patterning silver nanowires on 3-dimensional curved PDMS membranes

Cited by 6 publications

References 31 publications

Increased sensitivity of smart contact lenses for continuous intraocular pressure measurement using ring-shaped design

Increased sensitivity of smart contact lenses for continuous intraocular pressure measurement using ring-shaped design

Development of MEMS composite sensor with temperature compensation for tire pressure monitoring system

Recent progress for silver nanowires conducting film for flexible electronics

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