Patent · US Expired

Method of producing nanostructures in membrances, and asymmetrical membrane

US6908552B2 · kind B2 · utility

3Cited by

12References

6Claims

0Family size

Assignee

Gesellschaft für Schwerionenforschung mbH · DE

Inventors

Zuzanna Siwy · Piekary Śląskie, PL
Dobri Dobrev · Darmstadt, DE
Reinhard Neumann · Dossenheim, DE
Christina Trautmann · Darmstadt, DE
Kai Voss · Darmstadt, DE

Key dates

Filing date	Feb 26, 2002
Grant date	Jun 21, 2005
Priority date	—
Expiry date	Nov 18, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2325/022
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method of producing nanostructures in membranes, in which method a membrane consisting of a polymer material is irradiated with charged particles, especially ions, to produce particle tracks. The particle tracks in the membrane are etched using an etching liquid and the etching operation is stopped using a stop liquid, in such a manner that asymmetrical structures are formed. Polyimide is used as the membrane material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.