Molecularly Engineered Organic Semiconductor Networks with Ion-Trapping Effect for Long-Term Memory Transistor
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초록
내용
Organic electrochemical transistor is promising candidate for long-term potentiation (LTP), a synaptic function vital for memory formation. LTP is induced by repetitive stimulation and is promoted by an increase in neurotransmitter release and ion-binding receptors. Emulating biological synapses requires high ion concentrations and ion trapping in semiconductors. Here, we propose an ion trapping interpenetrating polymer semiconductor network(IT-IPSN) with an organosilica precursor and compare memory characteristics under different electric field to modulate ionic flow into the semiconductor. The unreacted silanol groups(-OH) of the IT-IPSN act as artificial receptors, providing effective ion trap sites due to their electron-withdrawing properties. As a result, the IT-IPSN synaptic transistor achieved high memory levels(~100µA) and long-term retention(~26 min), effectively mimicking biological LTP. We believe that our approach offers significant insights into bio-inspired synaptic transistors.