Nguyen Viet Cuong
Institute of Advanced Technology, Vietnam Academy of Science and Technology, 1 Mac Dinh Chi, Ho Chi Minh City 70072, Vietnam.
Micromachines (Basel). 2025 Jul 26;16(8):863. doi: 10.3390/mi16080863.
In this work, research on liquid-based resistive switching devices is carried out, using bottom printable electrodes fabricated from Silver (Ag) paste and silver nitrate (AgNO) solution. The self-crossing I-V curves are observed and repeatedly shown by applying 100 sweep cycles, demonstrating repeatability and stability. This liquid device can be refreshed by adding extra droplets of AgNO so that self-crossing I-V hysteresis with up to 493 dual sweeps can be obtained. The ability to be refreshed by supplying a new liquid solution demonstrates an advantage of liquid-based memristive devices, in comparison to their solid counterparts, where the switching layer is fixed after fabrication. The switching mechanism is attributed to Ag migration in the liquid, which narrows the gap between electrodes, giving rise to the observed phenomenon. The devices further show some synaptic properties including excitatory post-synaptic current (EPSC) and potentiation-depression, presenting opportunities to utilize the devices in mimicking some functions of biological neurons. The simplicity and cost-effectiveness of these devices may advance research into fluidic memristors, in which devices with versatile forms and shapes could be fabricated.
在这项工作中，开展了对基于液体的电阻式开关器件的研究，采用由银（Ag）糊剂和硝酸银（AgNO₃）溶液制成的底部可印刷电极。通过施加100个扫描周期观察到并反复呈现了自交叉I-V曲线，证明了其可重复性和稳定性。通过添加额外的硝酸银液滴可以刷新这种液体器件，从而获得高达493次双扫描的自交叉I-V滞后现象。与固态对应物相比，基于液体的忆阻器器件的一个优势在于能够通过供应新的液体溶液来刷新，因为固态器件的开关层在制造后是固定的。开关机制归因于液体中的银迁移，这会缩小电极之间的间隙，从而产生所观察到的现象。这些器件还表现出一些突触特性，包括兴奋性突触后电流（EPSC）和增强-抑制，为利用这些器件模拟生物神经元的某些功能提供了机会。这些器件的简单性和成本效益可能会推动对流体忆阻器的研究，在这种研究中可以制造出具有多种形式和形状的器件。
