Stretchable Resistive NO₂-Mediated Biomimetic Olfactory Synaptic Electronics

Neuromorphic electronic devices have already exhibited tremendous potential in mimicking the basic sensory and neuro-memory functions of living beings. However, while olfactory sensing electronics with ideal sensitivity and high selectivity achieved significant breakthroughs, synaptic devices that mimic the olfactory system have rarely been reported. Herein, a stretchable resistive olfactory neuromorphic device is proposed, which combines the common ductility of stretchable gold nanowires and porous polymer films to enable the olfactory synaptic function under different stretching states. The device achieves NO2-mediated synaptic plasticity and realize typical synaptic behaviors, including functions such as paired-pulse facilitation (PPF), short-term potential (STP) and long-term depression (LTD), and is able to mimic the cumulative damage that can be caused by exposure to NO2 even in the tensile strains up to 50%. The proposed stretchable electrons pave a new way for next-generation olfactory biomimetic systems.