Replication of Surface Structures with PDMS Soft Lithography

Full procedure can be found at: https://education.mrsec.wisc.edu/pdms... PDMS is cured by an organometallic crosslinking reaction to give an optically transparent polymer with the ability to reproduce surface features. In this experiment the polymer is cured in contact with optical transform slides or the pits on a CD or DVD. How well are the original features copied? Use diffraction of a laser beam to measure the original feature sizes and the sizes of the copied features. Since PDMS is flexible the surface features imprinted into the elastomer can be also be distorted mechanically and their changing spacings monitored by diffraction. UW MRSEC ON SOCIAL Follow UW MRSEC on Twitter:   / uwmrsec   Like UW MRSEC on Facebook:   / uwmrsec   The NSF-sponsored Wisconsin Materials Research Science and Engineering Center brings together teams of interdisciplinary researchers to address grand challenges in materials science. https://mrsec.wisc.edu/ The Wisconsin MRSEC has free, engaging educational activities for a variety of audiences. https://education.mrsec.wisc.edu/