3D Photofixation Lithography in Diels-Alder Networks.
3D structures are written and developed in a crosslinked polymer initially formed by a Diels-Alder reaction. Unlike conventional liquid resists, small features cannot sediment, as the reversible crosslinks function as a support, and the modulus of the material is in the MPa range at room temperature. The support structure, however, can be easily removed by heating the material, and depolymerizing the polymer into a mixture of low-viscosity monomers. Complex shapes are written into the polymer network using two-photon techniques to spatially control the photoinitiation and subsequent thiol-ene reaction to selectively convert the Diels-Alder adducts into irreversible crosslinks.
Department of Chemical and Biological Engineering, University of Colorado, Boulder CO 80309-0424, USA.
Brian J
BJ
Adzima
University of Delaware, Department of Materials Science and Engineering & Department of Chemical Engineering, Newark DE 19716 USA.
Christopher J
CJ
Kloxin
Department of Chemical and Biological Engineering, University of Colorado, Boulder CO 80309-0424, USA.
Cole A
CA
DeForest
Howard Hughes Medical Institute, University of Colorado, Boulder CO 80309-0424, USA.
Kristi S
KS
Anseth
Department of Chemical and Biological Engineering, University of Colorado, Boulder CO 80309-0424, USA. christopher.bowman@colorado.edu.
Christopher N
CN
Bowman
D061565:Cycloaddition Reaction; D005663:Furans / Q000737:chemistry*; D008027:Light; D008301:Maleimides / Q000737:chemistry*; D015394:Molecular Structure; D055668:Photochemical Processes; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000528:radiation effects; D013439:Sulfhydryl Reagents / Q000737:chemistry*
D005663:Furans; D008301:Maleimides; D011108:Polymers; D013439:Sulfhydryl Reagents