US Patent 7579077 - Nanofiber reservoir for drug delivery

http://www.freepatentsonline.com/7579077.html

This patent from Nanosys teaches a drug delivery system which uses semiconductor nanofibers in forming a high surface area reservoir for medical compounds. Claim 1 reads:

1. A drug delivery device for introduction of one or more substances into a subject, which device comprises a substrate made from a first material, which substrate comprises:

at least a first surface, a plurality of semiconductor nanofibers attached to the first surface which nanofibers are made from a second compositionally different material from the first material,

a reservoir of the one or more substances comprised between the members of the plurality of nanofibers, and

the one or more substance incorporated into the reservoir such that said one or more substances is at least partially shielded from direct exposure to bodily fluids within the subject when the device is introduced into the subject.