期刊
SMALL
卷 14, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201702131
关键词
biosensing; iontronics; nanofluidics; solid-state nanopores; supramolecular chemistry
类别
资金
- Deutsche Forschungsgemeinschaft [DFG-FOR 1583]
- CONICET [PIP0370]
- ANPCyT [PICT-2013-0905, PICT-2016-1680]
- CONICET
- LOEWE project iNAPO - Hessen State Ministry of Higher Education, Research and Arts
There is currently high interest in developing nanofluidic devices whose iontronic output is defined by biological interactions. The fabrication of a phosphate responsive nanofluidic diode by using the biological relevant amine-phosphate interactions is shown. The fabrication procedure includes the modification of a track-etched asymmetric (conical) nanochannel with polyallylamine (PAH) by electrostatic self-assembly. PAH is the arcaetypical model of polyamine and it is further used to address the nanochannels with phosphate responsivity. In order to explore the influence that phosphate in solution has in the conductance of the modified nanochannels, current-voltage measurements using different concentrations of phosphates are performed. Furthermore, to have a complete physicochemical understanding of the system, experimental data is analyzed using a continuous model based on Poison-Nernst-Planck equations and compared with results obtained from stochastic Monte Carlo simulations.
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