Nanofluidic gates for diffusion-free controlled release from microfluidic devices

Konferenz: Mikrosystemtechnik 2013 - Von Bauelementen zu Systemen
14.10.2013 - 16.10.2013 in Aachen, Deutschland

Tagungsband: Mikrosystemtechnik 2013

Seiten: 4Sprache: EnglischTyp: PDF

Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt

Autoren:
Jones, P. D.; Stelzle, M. (NMI – Naturwissenschaftliches und Medizinisches Institut, 72770 Reutlingen, Germany)
Molares, M. E. Toimil (GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany)
Trautmann, C. (GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany )

Inhalt:
We present a novel mechanism for controlled fluid release, based on hydrophobic gating of nanopores. Pores produced by the ion-track etching method can switch between discrete open and closed states in response to applied voltages, evidenced by measurements of transmembrane ionic conductance. Such gating indicates the formation of a nanoscale vapour barrier in a hydrophobic region of the pore, which disrupts the solvent pathway through the membrane, and can reversibly open and close in response to electrical actuation.