Flexible Pressure Sensor Based on Molybdenum Diselide/Multi-Walled Carbon Nanotubes for Human Motion Detection

Abstract

In recent years, with the rapid development of artificial intelligence and Internet of Things, flexible pressure sensors are attracting more and more attentions. Because the flexible pressure sensor has good flexibility, the sensor can be attached to the surface of the human skin as well as the surface of the object with complex structure. In the text, we used molybdenum diselide (MoSe ₂ )/multi-walled carbon nanotubes (MWNTs) as the sensing element, using polydimethylsiloxane (PDMS) stripped from sandpaper as the substrate, preparing a pressure sensor with a microscopic surface structure that is rough. This whole production process was simple, economical and could be used for large-scale production. MoSe ₂ /MWNTs pressure sensors offer compelling performance, including fast response (~150 ms), good repeatability (~10000 cycles), and a large operating range (0-30 kPa). Not only could it detect large human movements in real time, such as finger bending, walking, running, and swallowing, but also could detect subtle human movements such as coughing, gargling, and breathing. All results indicated that MoSe ₂ /MWNTs-based pressure sensors were promising candidates for medical monitoring and artificial intelligence wearable device applications, and could also be potential candidates for human-computer interaction systems.