title: Solution-cast high-aspect-ratio polymer structures from direct-write templates.
abstract: This letter presents a novel strategy for template synthesis of polymer structures with laser machined substrates. User-designed patterns of submicrometer holes with aspect ratios >10:1 and depths >10 μm were produced by focusing 160 fs, 5.2 μJ laser pulses on the surface of fused silica with a high numerical aperture microscope objective. Some holes were enlarged by chemical etching. Polymer solutions were cast into the templates to create high-aspect-ratio polymer structures using replication. Engineered polymer structures prepared by this unique method are useful for a number of applications such as high surface area electrodes and biological substrates.
authors.forename: D
authors.initials: D
authors.lastname: Rajput
authors.forename: L
authors.initials: L
authors.lastname: Costa
authors.forename: K
authors.initials: K
authors.lastname: Lansford
authors.forename: A
authors.initials: A
authors.lastname: Terekhov
authors.forename: W
authors.initials: W
authors.lastname: Hofmeister