Abstract
A flexible acoustic pressure sensor was developed based on the change in electrical resistance of three-dimensional (3D) graphene change under the acoustic waves action. The sensor was constructed by 3D graphene foam (GF) wrapped in flexible polydimethylsiloxane (PDMS). Tuning forks and human physiological tests indicated that the acoustic pressure sensor can sensitively detect the deformation and the acoustic pressure in real time. The results are of significance to the development of graphene-based applications in the field of health monitoring, in vitro diagnostics, advanced therapies, and transient pressure detection.
Highlights
In recent years, flexible pressure sensors have been highly desirable in applications such as electronic skin, structural health monitoring, robot sensor, personal health monitoring, sport performance monitoring, and rehabilitation [1,2,3,4]
Various flexible pressure sensors have been fabricated based on different nanomaterials, such as gold nanowire [9], ZnO nanowire [10], carbon nanotube (CNT) [4,11], and graphene [12]
The 3D graphene foam (GF) was synthesized by chemical vapor deposition method onfoam nickelwas foam as to a template
Summary
Flexible pressure sensors have been highly desirable in applications such as electronic skin, structural health monitoring, robot sensor, personal health monitoring, sport performance monitoring, and rehabilitation [1,2,3,4]. Flexible pressure sensors are divided into two categories: conducting polymer sensors [5]. It is generally believed that conducting polymers as a stress sensor can only detect static stress, while piezoelectric sensors are only suitable for measuring dynamic behavior, such as vibration and acoustic waves. Various flexible pressure sensors have been fabricated based on different nanomaterials, such as gold nanowire [9], ZnO nanowire [10], carbon nanotube (CNT) [4,11], and graphene [12]. Dong et al reported highly sensitive electrochemical sensors for detection of [Fe(CN)6 ]3+ and dopamine with free-standing graphene/ZnO hybrid electrodes.
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