Osmotically-Driven Transport in Carbon Nanotube Porins
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- 作者：Kyunghoon Kim ; Jia Geng ; Ramya Tunuguntla ; Luis R. Comolli ; Costas P. Grigoropoulos ; Caroline M. Ajo-Franklin ; Aleksandr Noy
- 刊名：Nano Letters
- 出版年：2014
- 出版时间：December 10, 2014
- 年：2014
- 卷：14
- 期：12
- 页码：7051-7056
- 全文大小：437K
- ISSN：1530-6992
文摘
We report the measurements of transport of ions and uncharged species through carbon nanotube (CNT) porins鈥攕hort segments of CNTs inserted into a lipid bilayer membrane. Rejection characteristics of the CNT porins are governed by size exclusion for the uncharged species. In contrast, rejection of ionic species is governed by the electrostatic repulsion and Donnan membrane equilibrium. Permeability of monovalent cations follows the general trend in the hydrated ion size, except in the case of Cs+ ions.