Beilstein J. Nanotechnol.2015,6, 472–479, doi:10.3762/bjnano.6.48
analysis reveals that the mechanism of SiO2 formation is based on subsurface crystal growth. By dissolving the polymer, the silica nanotubes are released from the ion-track membrane. The thickness of the tube wall is well controlled by the ALD process. Because the track-etchedchannels exhibited diameters
in the range of nanometres and lengths in the range of micrometres, cylindrical tubes with an aspect ratio as large as 3000 have been produced.
Keywords: atomic layer deposition (ALD); ion-track technology; nanochannels; polycarbonate; silica (SiO2); small angle X-ray scattering (SAXS); track-etched
channels; X-ray photoelectron spectroscopy (XPS); Introduction
Track-etched membranes are fabricated by heavy-ion irradiation of polymer foils and subsequent chemical etching of the ion tracks [1][2]. By controlling the etching parameters, cylindrical and conical channels can be fabricated by symmetric
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Figure 1:
Schematics of the fabrication of SiO2 coated membranes: (a) irradiation of PC foil with GeV heavy i...