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Langmuir. 2009 Oct 20;25(20):11993-7. doi: 10.1021/la902792f.

Logic gates using nanofluidic diodes based on conical nanopores functionalized with polyprotic acid chains.

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Technische Universit├Ąt Darmstadt, Fachbereich Material-u. Geowissenschaften, Fachgebiet Chemische Analytik, Petersenstrasse 23, D-64287 Darmstadt, Germany.


Single-track conical nanopores functionalized with polyprotic acid chains have pH-sensitive fixed charge groups and show three levels of conductance that allow integrating several functions on a single nanofluidic diode. Nanometer-scaled pores have previously been employed in separation and sensing but not in logic devices, despite the fact that biological ion channels with pH-dependent fixed charges are known to be responsible for information processing in biophysical structures. As a preliminary application, we propose a logic gate scheme where binary and multivalued logical functions are implemented.


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