Ionic Transport through Chemically Functionalized Hydrogen Peroxide-Sensitive Asymmetric Nanopores

详细信息    查看全文

• 作者：Mubarak Ali ; Ishtiaq Ahmed ; Saima Nasir ; Patricio Ramirez ; Christof M. Niemeyer ; Salvador Mafe ; Wolfgang Ensinger
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 9, 2015
• 年：2015
• 卷：7
• 期：35
• 页码：19541-19545
• 全文大小：409K
• ISSN：1944-8252

文摘

We describe the fabrication of a chemical-sensitive nanofluidic device based on asymmetric nanopores whose transport characteristics can be modulated upon exposure to hydrogen peroxide (H₂O₂). We show experimentally and theoretically that the current鈥搗oltage curves provide a suitable method to monitor the H₂O₂鈥搈ediated change in pore surface characteristics from the electronic readouts. We demonstrate also that the single pore characteristics can be scaled to the case of a multipore membrane whose electric outputs can be readily controlled. Because H₂O₂ is an agent significant for medical diagnostics, the results should be useful for sensing nanofluidic devices.