Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices
Abstract
Two-photon polymerization (TPP) is a unique fabrication technique that enables sub-micron scale resolution. Herein, we report on uniaxial tensile tests on millimeter-sized TPP log-pile structures that were fabricated using a recently developed interdigitated stitching strategy. As expected, the Young’s modulus increased with laser intensity, however elastic modulus, ultimate strength and strain-at-failure varied widely, even for nominally identical samples. Post-mortem analysis revealed a series of print defects resulting from various sources including misalignments, resin shrinkage, laser beam shadowing, and local depletion of the oxygen inhibitor. While some of the defects can be eliminated, such as misalignments due to insufficient precision of the mechanical stage, others are more intrinsic to TPP and thus more difficult to address.
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1783455
- Report Number(s):
- LLNL-JRNL-817309
Journal ID: ISSN 2159-6859; 1024849
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- MRS Communications
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 2; Journal ID: ISSN 2159-6859
- Publisher:
- Materials Research Society - Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; elastic properties; lithography; cellular; additive manufacturing; scale-up/manufacturing
Citation Formats
Forien, Jean-Baptiste, Oakdale, James S., Worthington, Matthew A., and Biener, Juergen. Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices. United States: N. p., 2021.
Web. doi:10.1557/s43579-021-00033-z.
Forien, Jean-Baptiste, Oakdale, James S., Worthington, Matthew A., & Biener, Juergen. Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices. United States. https://doi.org/10.1557/s43579-021-00033-z
Forien, Jean-Baptiste, Oakdale, James S., Worthington, Matthew A., and Biener, Juergen. Thu .
"Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices". United States. https://doi.org/10.1557/s43579-021-00033-z. https://www.osti.gov/servlets/purl/1783455.
@article{osti_1783455,
title = {Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices},
author = {Forien, Jean-Baptiste and Oakdale, James S. and Worthington, Matthew A. and Biener, Juergen},
abstractNote = {Two-photon polymerization (TPP) is a unique fabrication technique that enables sub-micron scale resolution. Herein, we report on uniaxial tensile tests on millimeter-sized TPP log-pile structures that were fabricated using a recently developed interdigitated stitching strategy. As expected, the Young’s modulus increased with laser intensity, however elastic modulus, ultimate strength and strain-at-failure varied widely, even for nominally identical samples. Post-mortem analysis revealed a series of print defects resulting from various sources including misalignments, resin shrinkage, laser beam shadowing, and local depletion of the oxygen inhibitor. While some of the defects can be eliminated, such as misalignments due to insufficient precision of the mechanical stage, others are more intrinsic to TPP and thus more difficult to address.},
doi = {10.1557/s43579-021-00033-z},
journal = {MRS Communications},
number = 2,
volume = 11,
place = {United States},
year = {Thu Apr 15 00:00:00 EDT 2021},
month = {Thu Apr 15 00:00:00 EDT 2021}
}
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