A memcapacitor device with a structure of Al/copolymer/ITO is fabricated by an organic donor-acceptor (D-A) copolymer. The device exhibits the bidirectional gradual modulation of the capacitance state, which enables it to simulate the synaptic plasticity. At first, the short-term plasticity (STP) of the synapse is realized in the device, including the paired pulse facilitation (PPF), potentiation and depression behaviors. Then the transition from STP to long-term plasticity (LTP) and the learning-forgetting-relearning behavior of the synapse is achieved by repeatedly applying voltage pulses stimulation. More inspiringly, these synaptic functions are well performed at low operating voltage of 0.1 V, the voltage is reduced by 95% to compare with the previous report. And the sensitivity can reach 50 mV, which is consistent with the action potential producing synaptic plasticity in the human brain. These results provide a powerful reference for the research of high sensitive artificial synapse with low power consumption based on memcapacitor.

通过有机供体-受体（DA）共聚物制造具有Al /共聚物/ ITO结构的膜电容器装置。该设备表现出电容状态的双向渐进调制，从而使其能够模拟突触可塑性。首先，在设备中实现突触的短期可塑性（STP），包括成对的脉冲促进（PPF），增强和抑制行为。然后，通过重复施加电压脉冲刺激，实现了从STP到长期可塑性（LTP）的转变以及突触的学习忘记行为。更令人鼓舞的是，这些突触功能在0.1 V的低工作电压下表现良好，与以前的报告相比，电压降低了95％。灵敏度可以达到50 mV，这与在人脑中产生突触可塑性的动作电位一致。这些结果为基于薄膜电容器的低功耗高灵敏人工突触的研究提供了有力的参考。