Investigation on the relationship between the equivalent resistance of the solution in microtubes and the applied voltage

• 1、School of Mechanical Engineering, Southeast University
• 2、Jiangsu Key Laboratory for Design and Manufacture of Micro-nano Biomedical Instruments，School of Mechanical Engineering, Southeast University

Abstract：A test rig is set up to measure the equivalent resistance of the solution in micro and nano tubes. The equivalent resistance for a set of microtubes with diameter ranging from 10 micrometer to 500 micrometer is measured. The experimental results show that: the value of the equivalent resistance of the solution was in inverse proportion to the voltage that applied on the two ends. It rapidly decreased to a constant value with the increase of the applied voltage. The constant value approximately equals the resistance of the corresponding bulk solution. It was considered that the electrolysis and the electric polarization of the solution had an important influence on the equivalent resistance of the solution in the microtubes when DC voltage is applied on the tubes.. The critical voltage at which the equivalent resistance decreases to the value for the bulk solution is about 4~6V.

Keywords： Microtube Equivalent Resistance Characteristics Experimental Study