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The Seventh International Symposium on Swift Heavy Ions in Matter, Lyon : France (2008)
Diode-like ion track asymmetric nanopores: some alternative methods of fabrication
P.Yu Apel 1, 2, I.V. Blonskaya 1, O.L. Orelovitch 1, S.N. Dmitriev 1
(2008-06)

We present two fabrication methods which allow production of ion track nanopore membranes with pronounced geometrical asymmetry and diode-like ionic conductivity. The asymmetry of the pores is provided by self-assembly of surfactant molecules at ion track entrances on one side of the ion-irradiated polymer foil. On the other side of the membrane, the effect of surfactant is excluded using a pre-treatment with ultraviolet radiation or a surfactant-free etching solution. Highly tapered pore profiles are obtained and characterized using SEM and FESEM. In electrolyte solutions, the asymmetric pores thus fabricated exhibit a high rectification of electric current. The nanopores with a large angle aperture can be of interest for resistive-pulse technique applications and for the atomic beam projection nanolithography.
1:  Flerov Laboratory of Nuclear Reactions
JINR
2:  The International University Dubna
The International University Dubna
Physics/Condensed Matter/Materials Science
ion-track – nanopores – surfactant – etching – ionic conductance – nanofluidic diode
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Apel_SHIM2.pdf(48.6 KB)

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