| Abstract Scope |
In response to the growing need for humidity sensors in non-contact health monitoring, there is a rising interest in creating devices with broad humidity detection ranges and fast responses. Leveraging the advantages of Direct Ink Writing (DIW), we developed a polymer-nanocomposite ink, combining Silicon carbide (SiC) and magnetite (Fe3O4) fillers within a Polyvinyl Alcohol (PVA) matrix. The hydrophilic nature, swelling properties, stability, and compatibility of PVA as the polymer matrix render it an ideal choice for humidity sensing, enhancing the responsiveness of humidity sensor devices. The synergistic combination of SiC and Fe3O4 ensures rapid response across diverse humidity levels. After rheological characterization, the composite inks were printed into interdigitated patterns. The accuracy of the printed traces was evaluated using image-analysis methods. Humidity detection and responsiveness were evaluated by monitoring electrical characteristics under varying environmental conditions. Our results demonstrate the successful 3D printing of a highly sensitive humidity-responsive nanocomposite using DIW. |