Ultrasensitive artificial synapse based on conjugated polyelectrolyte

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Emulating essential synaptic working principles using a single electronic device has been an important research field in recent years. However, achieving sensitivity and energy consumption comparable to biological synapses in these electronic devices is still a difficult challenge. Here, we report the fabrication of conjugated polyelectrolyte (CPE)-based artificial synapse, which emulates important synaptic functions such as paired-pulse facilitation (PPF), spike-timing dependent plasticity (STDP) and spiking rate dependent plasticity (SRDP). The device exhibits superior sensitivity to external stimuli andlow-energy consumption. Ultrahigh sensitivity and low-energy consumption are key requirements for building up brain-inspired artificial systems and efficient electronic-biological interface. The excellent synaptic performance originated from (i) a hybrid working mechanism that ensured the realization of both short-term and long-term plasticity in the same device, and (ii) the mobile-ion rich CPE thin film that mediate migration of abundant ions analogous to a synaptic cleft. Development of this type of artificial synapse is both scientifically and technologically important for construction of ultrasensitive highly-energy efficient and soft neuromorphic electronics.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Conjugated polyelectrolyte (CPE)-based artificial synapse was fabricated. </LI> <LI> Important working principles of a biological synapse are emulated. </LI> <LI> The artificial synapse potentially exhibited ultrahigh sensitivity and low energy consumption. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>An artificial synapse is fabricated to emulate biological functions with high sensitivity and low-energy consumption</P> <P>[DISPLAY OMISSION]</P>