Volumetric 3D printing enabled by triplet fusion upconversion nanocapsules

ORAL

Abstract

One way to achieve volumetric 3D printing, where a vat of polymerizable resin is patterned by light in three dimensions, is to use two-photon photopolymerization (2PP). While this approach has its advantages, high energy ultrafast lasers and slow print speeds hinder widespread adoption. Here, we present an analogous process driven by triplet fusion upconversion (UC). To ensure excellent light penetration through the vat of resin with the high sensitizer/annihilator concentrations required, the UC materials are encased in silica to generate robust nanocapsules for suspension in the resin. By pairing UC nanocapsules and commercially available photoinitiators and resins, we rapidly generate macroscale prints with fine detail.

*This research is funded through the support of the Rowland Fellowship at the Rowland Institute at Harvard, the Harvard PSE Accelerator Fund, and the Gordon and Betty Moore Foundation. This work was performed in part at the Center for Nanoscale Systems, a member of the National Nanotechnology Coordinated Infrastructure Network, which is supported by the National Science Foundation under NSF, Award No. 1541959. SNS acknowledges the support of the AOB Postdoctoral Fellowship. MS acknowledges financial support from the Swiss NSF (Project No. P1SKP2 187676).

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Presenters

  • Tracy Schloemer

    • Rowland Institute, Harvard University

Authors

  • Tracy Schloemer

    • Rowland Institute, Harvard University

  • Samuel Sanders

    • Rowland Institute, Harvard University

  • Mahesh Gangishetty

    • Rowland Institute, Harvard University

  • Daniel Anderson

    • Rowland Institute, Harvard University

  • Michael Seitz

    • Física de la Materia Condensada, Univ Autonoma de Madrid
    • Rowland Institute, Harvard University

  • Christopher Stokes

    • Rowland Institute, Harvard University

  • Daniel congreve

    • Stanford University
    • Rowland Institute, Harvard University