High-sensitivity Determination of Polymer Microstructures

Nanofibers Reinforced Polymer Composite Microstructures

Selective functionalization of 3-D polymer microstructures.

We demonstrate the selective functionalization of 3-D polymer microstructures that were created using multiphoton absorption polymerization. By fabricating different portions of the structures with acrylic and methacrylic polymers, we are able to take advantage of the differential reactivities of these materials to perform functionalization chemistry on a single polymeric component. We demonstr...

High sensitivity automated sequence determination of polypeptides.

We report the development of a high sensitivity Edman method for use in the automated protein sequenator. With the use of a radioactive coupling reagent, [35S]phenylisothiocyanate, and minor modifications in the sequenator program, sequence analyses have been performed on nanomole quantities of protein. The radioactive phenylthiohydantoin derivatives produced in the degradation are identified a...

Nanopressing: toward tailored polymer microstructures and nanostructures.

A simple and versatile method is developed for preparing anisotropic polymer particles by pressing polymer microspheres at elevated temperatures. Polystyrene (PS) microspheres are used to demonstrate this approach. Depending on the mechanical deformation and wetting of the polymers on the substrates, polymer structures with special shapes such as barrel-like or dumbbell-like shapes can be prepa...

Fabrication of high-aspect-ratio polymer microstructures and hierarchical textures using carbon nanotube composite master molds.

Scalable and cost effective patterning of polymer structures and their surface textures is essential to engineer material properties such as liquid wetting and dry adhesion, and to design artificial biological interfaces. Further, fabrication of high-aspect-ratio microstructures often requires controlled deep-etching methods or high-intensity exposure. We demonstrate that carbon nanotube (CNT) ...