Hybrid carbon nanotube/polyoxometalate thin film devices exhibit neuromorphic electrical behavior*

Thin films composed of randomly arranged single-walled carbon nanotubes (CNTs) exhibit remarkable electrical properties, enabling a wide range of applications. These properties can be further enhanced by incorporating additional components to form CNT hybrid films. In this work, we investigate the electrical characteristics of CNT thin films complexed with polyoxometalates (POMs). Under specific conditions, devices utilizing CNT/POM systems as the active layer show neuromorphic electrical behavior. Notably, we observe resistive switching during voltage cycling and current spiking under a constant DC bias. Time series analysis of the spiking behavior reveals signatures indicative of the system's proximity to criticality, suggesting potential for applications in neuromorphic computing and complex systems modeling.