KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Rectification of Ion Current Determined by the Nanopore Geometry: Experiments and Modelling | |
Zhou, Da-Ming ; Deng, Yun-Sheng; Ying, Cui-Feng; Zhang, Yue-Chuan; Feng, Yan-Xiao; Huang, Qi-Meng; Liang, Li-Yuan; Wang, De-Qiang
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| 2016 | |
| 摘要 | We provide a way to precisely control the geometry of a SiNx nanopore by adjusting the applied electric pulse. The pore is generated by applying the current pulse across a SiNx membrane, which is immersed in potassium chloride solution. We can generate single conical and cylindrical pores with different electric pulses. A theoretical model based on the Poisson and Nernst-Planck equations is employed to simulate the ion transport properties in the channel. In turn, we can analyze pore geometries by fitting the experimental current-voltage (I-V) curves. For the conical pores with a pore size of 0.5-2nm in diameter, the slope angles are around -2.5 degrees to -10 degrees. Moreover, the pore orifice can be enlarged slightly by additional repeating pulses. The conic pore lumen becomes close to a cylindrical channel, resulting in a symmetry I-V transport under positive and negative biases. A qualitative understanding of these effects will help us to prepare useful solid-nanopores as demanded. |
| DOI | 10.1088/0256-307X/33/10/108501 |
| 发表期刊 | CHINESE PHYSICS LETTERS
 |
| ISSN | 0256-307X |
| 卷号 | 33期号:10 |
| 通讯作者 | Wang, DQ (reprint author), Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000386125200038 |
| 语种 | 英语 |
