Concentration-Gradient-Dependent Ion Current Rectification in Charged Conical Nanopores
文献类型：期刊论文
| 作者 | Cao, Liuxuan3; Guo, Wei1,2; Wang, Yugang3; Jiang, Lei1,2,4 |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2012-01-31 |
| 卷号 | 28期号:4页码:2194-2199 |
| ISSN号 | 0743-7463 |
| DOI | 10.1021/la203837q |
| 英文摘要 | Ion current rectification (ICR) in negatively charged conical nanopores is shown to be controlled by the electrolyte concentration gradient depending on the direction of ion diffusion. The degree of ICR is enhanced with the increasing forward concentration difference. An unusual rectification inversion is observed when the concentration gradient is reversely applied. A numerical simulation based on the coupled Poisson and Nernst-Planck (PNP) equations is proposed to solve the ion distribution and ionic flux in the charged and structurally asymmetric nanofluidic channel with diffusive ion flow. Simulation results qualitatively describe the diffusion-induced ICR behavior in conical nanopores suggested by the experimental data. The concentration-gradient-dependent ICR enhancement and inversion is attributed to the cooperation and competition between geometry-induced asymmetric ion transport and the diffusive ion flow. The present study improves our understanding of the ICR in asymmetric nanofluidic channels associated with the ion concentration difference and provides insight into the rectifying biological ion channels. |
| 语种 | 英语 |
| WOS记录号 | WOS:000300466100035 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/47927]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Guo, Wei |
| 作者单位 | 1.Chinese Acad Sci, BNLMS, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China 3.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 4.Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm, Beijing 100191, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Liuxuan,Guo, Wei,Wang, Yugang,et al. Concentration-Gradient-Dependent Ion Current Rectification in Charged Conical Nanopores[J]. LANGMUIR,2012,28(4):2194-2199. |
| APA | Cao, Liuxuan,Guo, Wei,Wang, Yugang,&Jiang, Lei.(2012).Concentration-Gradient-Dependent Ion Current Rectification in Charged Conical Nanopores.LANGMUIR,28(4),2194-2199. |
| MLA | Cao, Liuxuan,et al."Concentration-Gradient-Dependent Ion Current Rectification in Charged Conical Nanopores".LANGMUIR 28.4(2012):2194-2199. |
入库方式： OAI收割
来源：化学研究所
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