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中文摘要：
通过引入一种新概念型电开关，首次提出研究生物网络液体电路或具有普遍意义的导电性微流体系统中的电学关断问题，通过有选择性地对通路中的水性电溶液实施冻结，则其内在特定方向上传输电流的离子可因溶液冻结后绝缘性的形成而被完全阻断，而一旦复温融化后，则此微流体电路中的电流又恢复其开启状态。为初步证实上述设想，设计了相应的概念性试验，通过检测溶液或生物系统在冻结及加热时的电阻瞬态响应规律，证实了方法的可行性。总结了冻结性电开关在控制导电性液体电路方面的工作性能及其在电泳分析、液相色谱分析以及在控制神经网络中信号传输方面的潜在应用。
英文摘要：
The electrically turning off properties of the liquid circuit in a biological network or a generalized conductive microfluidic system based on a new conception electrical switch was proposed. By selectively freezing part of the electric aqueous solution inside the circuit, the ions to conduct the electric current along a specific direction can be completely shut off due to the formation of the frozen insulation solution. After thawing, the current along the microfluidic circuit will resume its turning-on status again. For a preliminary demonstration, several conceptual experiments were performed to test the transient electrical impedances of the solution or biological system subject at freezing and heating, the convincing results were obtained. The working performances of the freezing electric switch on controlling the conductive liquid circuit were summarized, and its potential applications in electrophoretic analysis, liquid chromatogram analysis or especially controlling the signal transmission across the neural network, are suggested.
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