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Journal Article

Acoustic fabrication via the assembly and fusion of particles

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Fischer,  Peer       
Max Planck Institute for Medical Research, Max Planck Society;

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https://onlinelibrary.wiley.com/doi/epdf/10.1002/adma.201704507
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https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fadma.201704507&file=adma201704507-sup-0001-S1.pdf
(Supplementary material)

https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fadma.201704507&file=adma201704507-sup-0001-S1.mp4
(Supplementary material)

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Citation

Melde, K., Choi, E., Wu, Z., Palagi, S., Qiu, T., & Fischer, P. (2018). Acoustic fabrication via the assembly and fusion of particles. Advanced Materials, 30(3): 1704507, pp. 1-5. doi:10.1002/adma.201704507.


Cite as: https://hdl.handle.net/21.11116/0000-000B-23E6-A
Abstract
Acoustic assembly promises a route toward rapid parallel fabrication of whole objects directly from solution. This study reports the contact-free and maskless assembly, and fixing of silicone particles into arbitrary 2D shapes using ultrasound fields. Ultrasound passes through an acoustic hologram to form a target image. The particles assemble from a suspension along lines of high pressure in the image due to acoustic radiation forces and are then fixed (crosslinked) in a UV-triggered reaction. For this, the particles are loaded with a photoinitiator by solvent-induced swelling. This localizes the reaction and allows the bulk suspension to be reused. The final fabricated parts are mechanically stable and self-supporting.