Nanopatterned templates from oriented degradable diblock...

Details Nanopatterned templates from oriented degradable diblock... Nanopatterned templates from oriented degradable diblock...

2004-05-18

2009-12-15

Culbert, Roberts (Department: 1792)

Coating processes

Nonuniform coating

Deforming the base or coating or removing a portion of the...

C427S256000

Reexamination Certificate

active

07632544

ABSTRACT:
A nanopatterned template for use in manufacturing nanoscale objects. The nanopatterned template contains a nanoporous thin film with a periodically ordered porous geomorphology which is made from a process comprising the steps of: (a) using a block copolymerization process to prepare a block copolymer comprising first and second polymer blocks, the first and second polymer blocks being incompatible with each other; (b) forming a thin film under conditions such that the first polymer blocks form into a periodically ordered topology; and (c) selectively degrading the first polymer blocks to cause the thin film to become a nanoporous material with a periodically ordered porous geomorphology. In a preferred embodiment, the block copolymer is poly(styrene)-poly(L-lactide) (PS-PLLA) chiral block copolymer, the first polymer is poly(L-lactide), and the second polymer is polystyrene. Experimental results show that the first polymer blocks can be formed into a hexagonal cylindrical geomorphology with its axis perpendicular to a surface of the thin film. After hydrolysis to selectively degrade the first polymer blocks, a thin film having a series of repeated nanoscale hexagonal-cylindrical channels is obtained.

REFERENCES:
patent: 6054111 (2000-04-01), Antonietti et al.
patent: 6271308 (2001-08-01), de Boer et al.
Zalusky et al. “Mesoporous Polystyrene Monoliths”, Journal American Chemical Society. 2001, 123, 1519-1520.

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