Sensors, Vol. 24, Pages 2819: Flexible Force Sensor Based on a PVA/AgNWs Nanocomposite and Cellulose Acetate

Sensors, Vol. 24, Pages 2819: Flexible Force Sensor Based on a PVA/AgNWs Nanocomposite and Cellulose Acetate Sensors doi: 10.3390/s24092819 Authors: Dulce Natalia Castillo-López Luz del Carmen Gómez-Pavón Alfredo Gutíerrez-Nava Placido Zaca-Morán Cesar Augusto Arriaga-Arriaga Jesús Manuel Muñoz-Pacheco Arnulfo Luis-Ramos Nanocomposites are materials of special interest for the development of flexible electronic, optical, and mechanical devices in applications such as transparent conductive electrodes and flexible electronic sensors. These materials take advantage of the electrical, chemical, and mechanical properties of a polymeric matrix, especially in force sensors, as well as the properties of a conductive filler such as silver nanowires (AgNWs). In this work, the fabrication of a force sensor using AgNWs synthesized via the polyol chemical technique is presented. The nanowires were deposited via drop-casting in polyvinyl alcohol (PVA) to form the active (electrode) and resistive (nanocomposite) sensor films, with both films separated by a cellulose acetate substrate. The dimensions of the resulting sensor are 35 mm × 40 mm × 0.1 mm. The sensor shows an applied force ranging from 0 to 3.92 N, with a sensitivity of 0.039 N. The sensor stand-off resistance, exceeding 50 MΩ, indicates a good ability to detect changes in applied force without an external force. Additionally, studies revealed a response time o...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research