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Analysis of Voxel Size During Two-Photon Polymerization

[+] Author Affiliations
Serge L. H. F. Gregory, Elijah Kannatey-Asibu, Jr.

University of Michigan, Ann Arbor, MI

Paper No. MSEC2012-7374, pp. 465-472; 8 pages
  • ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing
  • ASME 2012 International Manufacturing Science and Engineering Conference
  • Notre Dame, Indiana, USA, June 4–8, 2012
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 978-0-7918-5499-0
  • Copyright © 2012 by ASME


Two-photon polymerization combines the concepts of multi-photon absorption with polymerization of a free radical polymerizable monomer. It can be used to fabricate a variety of micro-devices including micro-fluidic, biomedical, micro-optical, and micro-mechanical devices. A critical aspect of two-photon polymerization is the resolution of the process. This paper derives an expression for the voxel (volume element) size produced during two-photon polymerization. The model assumes a Gaussian beam and the effects of beam power, lens parameters, and resin polymerization threshold are investigated. A sensitivity analysis is also performed, and the results show that the voxel formed is more sensitive to changes in beam power and resin threshold than to changes in the incident beam diameter.

Copyright © 2012 by ASME



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