Direct Writing and Actuation of Three-Dimensionally Patterned Hydrogel Pads on Micropillar Supports
Written by: Grant England AP225 Fall, 2011
Title: Direct Writing and Actuation of Three-Dimensionally Patterned Hydrogel Pads on Micropillar Supports
Authors: Lauren D. Zarzar, Philseok Kim, Mathias Kolle, C. Jeffrey Brinker, Joanna Aizenberg, and Bryan Kaehr
The main results of this paper were the extension of the hydrogel actuation model to include the ability for unconstrained actuation and local actuation of high aspect ratio structures in response to various stimuli (pH, temperature, etc.).
Methods and Results
By using a multiphoton lithographic technique to initiate the polymerization of the hydrogel, the hydrogel can be patterned three-dimensionally onto a substrate, which allows for greater swelling of the hydrogel and therefore a greater amount of actuation of the micropillars. Additionally, the patterning method allows for localized areas of pillars to be actuated by the hydrogels response characteristic as seen in the figures below.