| Measurements of the ion-depletion zone evolution in a micro/nano-channel | |
Yu Q(余群) ; Li ZH(李占华); Silber-Li, Z (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
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| Source Publication | Microfluidics and Nanofluidics
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| 2011 | |
| Volume | 11Issue:5Pages:623-631 |
| ISSN | 1613-4982 |
| Abstract | Ion-depletion and ion-enrichment are the most important phenomena found in a hybrid micro/nano-channel. This depletion process significantly decreases the ion concentration at the anodic end of the nano-channels and lower concentration propagation in the microchannel. The present paper focuses on measurement and analyzes the extension of the depletion zone with time and propagation of concentration perturbation. The systemic experiments were conducted using the nano-porous membranes with different pore diameters (I center dot 15 nm, I center dot 50 nm), the applied electric voltages (20-100 V) and the buffer solution pH values (pH 5.4, 9.2). According to dimensionless analysis, the extension of the depletion boundary was initially found to be independent of time and to have a non-linear variation for larger times. Based on Nernst-Planck equation, a one-dimensional wave equation is obtained under certain hypothesis, which also shows the propagation of concentration perturbation in depletion zone with constant speed at the initial time. |
| Keyword | Ion-depletion And Enrichment Depletion Extension Propagation Velocity Hybrid Micro/nano-channels Sample Preconcentration Nanofluidic Channels Transport Enrichment Separation Devices Chip Flow |
| Subject Area | Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics |
| DOI | 10.1007/s10404-011-0828-z |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000296013400012 |
| WOS Keyword | SAMPLE PRECONCENTRATION ; NANOFLUIDIC CHANNELS ; TRANSPORT ; ENRICHMENT ; SEPARATION ; DEVICES ; CHIP ; FLOW |
| WOS Research Area | Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics |
| WOS Subject | Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Fluids & Plasmas |
| Funding Organization | The authors wish to acknowledge, with thanks, the financial support of the National Basic Research Program of China (2007CB714501), Knowledge Innovation Program of CAS (KJCX2-YW-H18) and the National Natural Science Foundation of China (10872203). The authors thank Trevor H. Moulden for useful discussions. |
| Department | LNM微纳米流体力学 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44898 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Silber-Li, Z (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Yu Q,Li ZH,Silber-Li, Z . Measurements of the ion-depletion zone evolution in a micro/nano-channel[J]. Microfluidics and Nanofluidics,2011,11,5,:623-631. |
| APA | 余群,李占华,&Silber-Li, Z .(2011).Measurements of the ion-depletion zone evolution in a micro/nano-channel.Microfluidics and Nanofluidics,11(5),623-631. |
| MLA | 余群,et al."Measurements of the ion-depletion zone evolution in a micro/nano-channel".Microfluidics and Nanofluidics 11.5(2011):623-631. |
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