Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 35, Pages 19541-19545Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06015
Keywords
asymmetric nanopores; chemical functionalization; H2O2-sensitive pore; current rectification; Nernst-Planck equations
Funding
- Hessen State Ministry of Higher Education, Research and the Arts, Germany, under the LOEWE project iNAPO
- Ministry of Economic Affairs and Competitiveness
- FEDER [MAT2012-32084]
- Generalitat Valenciana [Prometeo/GV/0069]
- Helmholtz programme Bio-Interfaces in Technology and Medicine
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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 voltage curves provide a suitable method to monitor the H2O2 mediated 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.
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