Zinc oxide nanostructure-based textile pressure sensor for wearable applications
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Zinc oxide nanostructure-based textile pressure sensor for wearable applications J. Abanah Shirley1 · S. Esther Florence1 · B. S. Sreeja1 · G. Padmalaya1 · S. Radha1 Received: 21 May 2020 / Accepted: 7 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Wearable textile pressure sensors with piezoelectric properties are a very effective way of detecting movements of the human body based on the force exerted by the sensor. Owing to the merits of flexibility and breathability, the textile pressure sensor finds potential application in biomedical monitoring and human-machine interaction. The textile pressure sensor works on the principle of piezoelectricity where an electrode of conductive woven fabric forms the outer layer and a semi-conductive material such as ZnO is sandwiched between two conductive layers. ZnO is prepared using a simple hydrothermal method and SEM, XRD are two effective methods to detect the presence of ZnO on the conductive fabric. The pressure applied on the fabric is translated into voltage and the output voltages are compared using two samples of ZnO nanostructures. The effect of the seed layer is investigated under identical growth and measurement which influences the output performance of voltage. This property can be used to change the sensitivity and working range of pressure sensor for specific applications. The pressure sensor designed can be sewn directly onto the clothing which conforms to the human body’s flexible curved surface.
1 Introduction Interest has been nourished towards flexible pressure sensors that finds potential applications in the field of wearable electronics [1], soft-robotics [2], human–machine interfacing [3], sports [4], biomedical devices [5] and human motion analysis [6]. Recently, many review papers focused mainly on the development of flexible pressure sensors [7, 8]. Integrating such pressure sensors in cloth or any fabric material has many advantages which proves to be flexible, comfortable lightweight, breathable and washable. Recently, the way pressure measured has made a remarkable turnaround * J. Abanah Shirley [email protected] S. Esther Florence [email protected] B. S. Sreeja [email protected] G. Padmalaya [email protected] S. Radha [email protected] 1
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, TN 603110, India
with increased sensitivity, precision and compact design with the introduction of versatile pressure sensors in the market. Smart textiles with electrical functionalities have hit the market on a high scale in recent times and it has been incorporated as sensor devices for many purposes [9, 10]. The sensor design is very significant, because lots were confined to the compact structure and wearability aspects. Former commercialized pressure sensors are coin-shaped and are made of PCB substrate [11] or PET films [12] which makes it difficult to bend and it also gives a feeling of irritation when the se
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