Sabbagh Barak, Zhang Zhenyu, Yossifon Gilad
Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Israel.
School of Mechanical Engineering, Southeast University, China.
Faraday Discuss. 2023 Oct 12;246(0):141-156. doi: 10.1039/d3fd00061c.
Bioinspired artificial ionic components are extensively utilized to mimic biological systems, as the vast majority of biological signaling is mediated by ions and molecules. Particular attention is given to nanoscale fluidic components where the ion transport can be regulated by the induced ion permselectivity. As a step from fundamentals toward ion-controlled devices, this study presents the use of ionic diodes made of oppositely charged polyelectrolytes, as a gate for low-abundance molecules. The use of ionic diodes that exhibited nonlinear current-voltage responses enabled realization of a basic Boolean operation of an ionic OR logic gate. Aside from the electrical response, the asymmetric ion transport through the diode was shown to affect the transport of low-abundance molecules across the diode, only allowing crossing when the diode was forward-biased. Integration of multiple diodes enabled implementation of an OR logic operation on both the voltage and the molecule transport, while obtaining electrical and optical output readouts that were associated with low and high logic levels. Similarly to electronics, implementation of logic gates opens up new functionalities of on-chip ionic computation integrated circuits consisting of multiple basic logic gates.
受生物启发的人工离子组件被广泛用于模拟生物系统，因为绝大多数生物信号是由离子和分子介导的。特别关注纳米级流体组件，其中离子传输可以通过诱导的离子选择透过性来调节。作为从基础研究迈向离子控制设备的一步，本研究展示了使用由带相反电荷的聚电解质制成的离子二极管作为低丰度分子的门控。使用呈现非线性电流-电压响应的离子二极管能够实现离子或逻辑门的基本布尔运算。除了电响应外，通过二极管的不对称离子传输被证明会影响低丰度分子穿过二极管的传输，只有在二极管正向偏置时才允许通过。多个二极管的集成实现了电压和分子传输的或逻辑运算，同时获得与低逻辑电平及高逻辑电平相关的电输出和光输出读数。与电子学类似，逻辑门的实现为包含多个基本逻辑门的片上离子计算集成电路开辟了新功能。
