KMS Chongqing Institute of Green and Intelligent Technology, CAS
| rectificationofioncurrentdeterminedbythenanoporegeometryexperimentsandmodelling | |
Zhou Daming ; Deng Yunsheng; Ying Cuifeng; Zhang Yuechuan; Feng Yanxiao; Huang Qimeng; Liang Liyuan; Wang Deqiang
| |
| 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. |
| 发表期刊 | chinesephysicsletters
 |
| ISSN | 0256-307X |
| 卷号 | 33期号:10页码:158 |
| 语种 | 英语 |
