Measurements of the ion-depletion zone evolution in a micro/nano-channel
文献类型：期刊论文
| 作者 | Yu Q(余群) ; Li ZH(李占华)
|
| 刊名 | Microfluidics and Nanofluidics
 |
| 出版日期 | 2011 |
| 卷号 | 11期号:5页码:623-631 |
| 通讯作者邮箱 | lili@imech.ac.cn |
| 关键词 | Ion-Depletion And Enrichment Depletion Extension Propagation Velocity Hybrid Micro/Nano-Channels Sample Preconcentration Nanofluidic Channels Transport Enrichment Separation Devices Chip Flow |
| ISSN号 | 1613-4982 |
| 产权排序 | [Yu, Qun; Silber-Li, Zhanhua] Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Silber-Li, Z (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| 中文摘要 | 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. |
| 学科主题 | Science & Technology - Other Topics; Instruments & Instrumentation; Physics |
| 分类号 | 一类 |
| 类目[WOS] | Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Fluids & Plasmas |
| 研究领域[WOS] | Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics |
| 关键词[WOS] | SAMPLE PRECONCENTRATION ; NANOFLUIDIC CHANNELS ; TRANSPORT ; ENRICHMENT ; SEPARATION ; DEVICES ; CHIP ; FLOW |
| 收录类别 | SCI ; EI |
| 资助信息 | 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. |
| 原文出处 | http://dx.doi.org/10.1007/s10404-011-0828-z |
| 语种 | 英语 |
| WOS记录号 | WOS:000296013400012 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/44898]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yu Q,Li ZH. 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.(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. |
入库方式： OAI收割
来源：力学研究所
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