Diffusiophoresis of a Charged Sphere in a Necked Nanopore

详细信息    查看全文

• 作者：Ting-Wen Lo ; Chien Hsu ; Kuan-Liang Liu ; Jyh-Ping Hsu ; Shiojenn Tseng
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：September 19, 2013
• 年：2013
• 卷：117
• 期：37
• 页码：19226-19233
• 全文大小：417K
• 年卷期：v.117,no.37(September 19, 2013)
• ISSN：1932-7455

文摘

In an attempt to improve the performance of single-molecule nanopore based biosensors, we study theoretically the diffusiophoresis of a particle along the axis of a charged, necked nanopore, and the mechanisms involved. Numerical simulation is conducted by varying the geometry of the nanopore and its charged status, the particle position, and the background salt concentration to examine the particle behavior under various conditions and to gather necessary information for future device design. We show that the strength of the local concentration gradient, the charge density of the nanopore, and the presence of the nanopore wall yield complicated and interesting diffusiophoretic behaviors, which are informative to potential applications.