Graphene as a piezoresistive material in strain sensing applications

Sayar Irani, Farid and Hosseinpour Shafaghi, Ali and Taşdelen, Melih Can and Delipınar, Tuğçe and Kaya, Ceyda Elcin and Yapici, Guney Guven and Yapıcı, Murat Kaya (2022) Graphene as a piezoresistive material in strain sensing applications. Micromachines, 13 (1). ISSN 2072-666X

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High accuracy measurement of mechanical strain is critical and broadly practiced in several application areas including structural health monitoring, industrial process control, manufacturing, avionics and the automotive industry, to name a few. Strain sensors, otherwise known as strain gauges, are fueled by various nanomaterials, among which graphene has attracted great interest in recent years, due to its unique electro-mechanical characteristics. Graphene shows not only exceptional physical properties but also has remarkable mechanical properties, such as piezoresistivity, which makes it a perfect candidate for strain sensing applications. In the present review, we provide an in-depth overview of the latest studies focusing on graphene and its strain sensing mechanism along with various applications. We start by providing a description of the fundamental properties, synthesis techniques and characterization methods of graphene, and then build forward to the discussion of numerous types of graphene-based strain sensors with side-by-side tabular comparison in terms of figures-of-merit, including strain range and sensitivity, otherwise referred to as the gauge factor. We demonstrate the material synthesis, device fabrication and integration challenges for researchers to achieve both wide strain range and high sensitivity in graphene-based strain sensors. Last of all, several applications of graphene-based strain sensors for different purposes are described. All in all, the evolutionary process of graphene-based strain sensors in recent years, as well as the upcoming challenges and future directions for emerging studies are highlighted.
Item Type: Article
Uncontrolled Keywords: Gauge factor; Graphene; Graphene transfer and integration; MEMS; Piezoresistance; Piezoresistivity; Strain gauge; Strain sensor
Divisions: Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Murat Kaya Yapıcı
Date Deposited: 25 Aug 2022 21:15
Last Modified: 25 Aug 2022 21:15

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