Nanochannel Filter.
Abstract
The present invention provides a wafer-like glass filter having channels therethrough having an average diameter of less than 1 micron: The invention also provides a method for forming such a filter comprising the steps of: inserting acid etchable glass rods into respective inert hollow glass tubes; heating said rods and tubes to fuse each respective rod to a respective tube; drawing each of said fused rods and tubes to reduce the diameter of the rods and tubes to thereby form a filament; stacking a plurality of said filaments together to form a stack of filaments; heating the stack of filaments to fuse the filaments together to form an elongated bar having a plurality of channels filled with etchable glass; drawing said bar until each of the channels has a diameter of less than 1 micron; cutting the elongated bar to form a wafer-like filter; annealing the filter at an elavated temperature; and acid etching the etchable glass in the wafer-like filter to form channels therethrough having an average diameter of less than about 1 micron.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 12, 1992
- Accession Number
- ADD015645
Entities
People
- Brian Justus
- Ronald J. Tonucci
Organizations
- United States Department of the Navy