Rapid Response Humidity Sensor Based on GO/CaCo3@Ag Nanocomposite for Real-Time Applications

Breath-monitoring sensors hold immense potential for real-time healthcare data collection. Furthermore, humidity-sensing devices continue to play a pivotal role in a all-around of industries, such as manufacturing, food processing, agriculture, and meteorology. Here, we have introduced a rapid-response nanocomposite film based on GO/CaCO
3
@Ag coated on the interdigitated capacitor electrode (IDC). The GO/CaCO
3
@Ag composite-based sensor demonstrates a sensitivity of 56.5 pF/% and a hysteresis of 6.9% within the 25-95% RH range. The developed sensor also has a rapid 7.2 s response time and 1.8 s recovery time. This sensing platform proves to be a promising choice for various humidity sensing applications, especially real-time breath monitoring, due to its exceptional sensitivity and rapid response.