Tubes with inner diameters on the scale of nanometers

Hollow fibres with inner diameters under 0,1 mm are versatile materials, which are already being used as separation and storage media, for the treatment of water as well as in micro-electronics and optics, for catalyst technology as well as for special fibres of the textile industry. Using previous production procedures it is impossible to manufacture hollow fibres with very small inner diameters, which are both mechanically and thermally stable. A new procedure permits the production of technically usable hollow fibres with inner diameters on the scale of nanometers: Template fibres consisting of degradable materials are produced with electrospinning techniques. They can be coated precisely with different materials. After having removed the template material, the resulting hollow fibres obtain their predefined, minute inner diameter and predetermined surface characteristics.

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