Electroviscous effect on the streaming current in a pH-regulated nanochannel |
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| Institution: | 1. Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan;2. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. Institute of Micro/Nanotechnology, Old Domi nion University, Norfolk, VA 23529, USA;1. Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Hangzhou 310018, China;2. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China;3. Key Laboratory of E&M (Zhejiang University of Technology), Ministry of Education & Zhejiang Province, Hangzhou 310014, China;4. State Key Laboratory of Information Photonics and Optical Communication, Beijing University Posts and Telecommunications, Beijing 100876, China;1. Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan;2. Department of Mathematics, Tamkang University, Tamsui, Taipei 25137, Taiwan;3. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan |
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| Abstract: | Accurate and rapid estimation of the streaming current in nanochannels is crucial for the development of the nanofluidics based power generation apparatus. In this study, an analytical model is developed for the first time to examine the electroviscous effect on the streaming current/conductance in a pH-regulated nanochannel by considering practical effects of multiple ionic species, surface chemistry reactions, and the Stern layer. Predictions from the model are in good agreement with the experimental results of the streaming conductance in silica nanochannels available in the literature. The electroviscous effect could have a significant reduction of ca. 30% in the streaming conductance at medium pH and low salt concentration. |
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