Observation of the induced pressure in a hybrid mlcro/nano-channel |
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Authors: | KONG Gao-pan ZHENG Xu SILBER-LI Zhan-hua XU Zheng |
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Affiliation: | [1]The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China [2]Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, 116024 Dalian, China |
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Abstract: | This paper studies the flow characteristics in micro/nano-channels subjected to an applied electric field. The nano-channel flow was observed by means of the fluorescence Calcein. A Fluorescence Concentration Gradient Interface (FCGI) was observed across the nano-channel array. The front of the FCGI was shown to have an analogous parabolic shape. The propagation of this interface reflects indirectly the induced pressure at the micro/nano-channel junction, where the enrichment-depletion processes are known to take place. This induced pressure was predicted by numerical simulations, and this paper gives the first experimental evidence. |
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Keywords: | : micro/nano-channel induced pressure ion enrichment/depletion |
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