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research article

Controlling Light in Scattering Materials for Volumetric Additive Manufacturing

Madrid-Wolff, Jorge  
•
Boniface, Antoine  
•
Loterie, Damien  
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May 18, 2022
Advanced Science

3D printing has revolutionized the manufacturing of volumetric components and structures in many areas. Several fully volumetric light-based techniques have been recently developed thanks to the advent of photocurable resins, promising to reach unprecedented short print time (down to a few tens of seconds) while keeping a good resolution (around 100 mu m). However, these new approaches only work with homogeneous and relatively transparent resins so that the light patterns used for photo-polymerization are not scrambled along their propagation. Herein, a method that takes into account light scattering in the resin prior to computing projection patterns is proposed. Using a tomographic volumetric printer, it is experimentally demonstrated that implementation of this correction is critical when printing objects whose size exceeds the scattering mean free path. To show the broad applicability of the technique, functional objects of high print fidelity are fabricated in hard organic scattering acrylates and soft cell-laden hydrogels (at 4 million cells mL(-1)). This opens up promising perspectives in printing inside turbid materials with particular interesting applications for bioprinting cell-laden constructs.

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Type
research article
DOI
10.1002/advs.202105144
Web of Science ID

WOS:000797221900001

Author(s)
Madrid-Wolff, Jorge  
Boniface, Antoine  
Loterie, Damien  
Delrot, Paul  
Moser, Christophe  
Date Issued

2022-05-18

Publisher

WILEY

Published in
Advanced Science
Article Number

2105144

Subjects

Chemistry, Multidisciplinary

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Nanoscience & Nanotechnology

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Materials Science, Multidisciplinary

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Chemistry

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Science & Technology - Other Topics

•

Materials Science

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bioprinting

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complex materials

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light-based 3d printing

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light scattering

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volumetric additive manufacturing

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3d

•

2d

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LAPD  
Available on Infoscience
June 6, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188279
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